Thanks to our 2026 Sponsors:
  • Idaho Potato Commission
  • Snake River Sugar Research and Seed Alliance
  • Idaho Alfalfa & Clover Seed Commission

Search Results

Your search for "All Alerts" in All Alerts
yielded 2128 results.

Swipe Left or Right to navigate Alerts

2020 Peachtree Borer

General Landscape and Garden    Treasure Valley

Peachtree Borer (Synanthedon exitiosa)

Posted on: June 10, 2020 by Nic Usabel

Peachtree bores have been caught in traps, maintained by Idaho Master Gardeners, in Middleton and Nampa. This pest is a concern for stone fruits: Peach, nectarine, apricot, cherry, and plum. Key symptoms of peachtree borer infestation is the presence of sawdust and frass mixed with the gummy substance near the base of the trunk. Prevention is the best method of control.

Larvae injure the fruit tree primarily by burrowing into the tree trunks just at or below the soil line but may enter trunk up to 12” above the soil line. Larvae feed in the cambium beneath the bark girdling the tree.

Chemical Control, Home Use: For orchards less than 1 acre, or for home yard trees, preventative trunk sprays are the primary control. Apply the first application immediately after first trap catch and repeat application based on product label guidelines. Follow the required pre-harvest interval (time between last application and allowed harvest of fruit) of insecticide product. Apply insecticide as a bark drench at a rate of ½ to 1 gallon of spray mix per tree. Thoroughly cover the lower 12 inches of trunk and soak the ground at the base of tree. Do not allow the sprays to contact fruit. For chemical option review the PNW handbook link below.

Chemical Control, Commercial: Reference the PNW handbook link below to see spring and summer application recommendations.

Cultural Control: Larvae inside the trunks can be killed by inserting a wire into entry holes. Kill larvae in the late summer and fall before they spend the winter and inflict their most extensive feeding damage the following spring. Keep base of tree free of vegetation – heat and dryness reduce the survival of eggs and larvae.

Oregon COVID-19 Costs for Food Security & Farmworker Safety Program

All Crops    Northern Idaho

Posted on: June 10, 2020 by Stuart Reitz

Oregon’s Food Security and Farmworker Safety Program provides assistance to Oregon’s agricultural producers in order to help secure Oregon’s food supply chain and protect essential agricultural workers from COVID-19 exposure and illness.

The COVID-19 emergency caused Oregon’s Occupational Safety and Health Administration (OR-OSHA) to issue temporary rules requiring increased field sanitation measures and more stringent labor housing and transportation regulations.
Agricultural producers are responsible for complying with COVID-19 emergency OR-OSHA requirements for Housing, Transportation, and Field Sanitation. Producers faced with additional costs because of this can apply for assistance in any or all categories. There is no need to fill out a separate application for each; a single application will cover all 3 categories.

Please see https://www.oregon.gov/oweb/fsfs/Pages/index.aspx for application and additional information. One application will cover the three program areas of housing, transportation, and field sanitation.

Additional rules for worker protection is available from Oregon OSHA is at https://osha.oregon.gov/Documents/COVID-19-Emergency-Ag-Rule-Q-A.pdf

Volunteer potato control recommendations for 2020

Potato    All Locations

volunteer potatoes

Posted on: June 10, 2020 by Jerry Neufeld

The pdf below contains "Volunteer potato control recommendations for 2020." This information is provided by Dr. Pamela J.S. Hutchinson, Potato Cropping Systems Weed Scientist, University of Idaho Aberdeen R&E Center.

Stripe rust (or Yellow Rust) in Wheat - Western Idaho

All Crops    All Locations

Stripe rust on wheat

Posted on: June 5, 2020 by Juliet Marshall

Stripe rust has found its way to western Idaho, reported from at least two locations (with accompanying picture), one location was on UI Magic CL+. (Thanks Oliver Neher!) The growth stage of winter wheat in that area is past the window of fungicide application, and is currently in grain fill. Spring wheat is still vulnerable and susceptible varieties should be scouted for the appearance of stripe rust.

In the Magic Valley and into eastern Idaho, winter wheat is heading and susceptible varieties are still vulnerable to significant yield loss associated with stripe rust infection. Stripe rust reaction of last year’s varieties in the Extension Variety Trials is reported in the 2019 Small Grains Report available online at https://www.uidaho.edu/extension/cereals/scseidaho. (The data is included here as attachments.). Also keep an eye out for stripe rust on barley. No barley stripe rust has been reported so far this year.

Please note that while some wheat varieties were reported as resistant in 2019, race changes were reported in California by Dr. Mark Lundy (UC Davis pathologist) in this year’s crop; therefore scouting of all varieties is recommended this season. Please report observations so we can keep track of the in-season spread.

The weather forecast for this and especially next week is very conducive to stripe rust spread and infection. Fungicide application recommendations developed through NCERA-184 pathologists, coordinated by Dr. Erick De Wolfe Kansas State University, is also attached.

New edition of Potato Production Systems

Potato    All Locations

Posted on: June 5, 2020 by Jerry Neufeld

Dr. Mike Thornton, Professor of Plant Sciences, University of Idaho Parma Research and Extension Center is reporting that a new edition of Potato Production Systems was published recently by Springer Publishing. The comprehensive book includes contributions by 39 authors, 22 of whom are current or emeritus U of I faculty. The book, originally published by UI Extension in 2003, functions as a textbook for CALS Potato Science course and as a reference for potato industry professionals. You can find more information about the book on the Springer website by clicking on the link below.

2020 Peach Twig Borer

General Landscape and Garden    Treasure Valley

Peach Twig Borer (Anarsia lineatella)

Posted on: June 4, 2020 by Nic Usabel

Management of the peach twig borer, based on degree days and trap catches, will take place June 5 – June 10. This pest is a concern for those growing peach, nectarine, apricot, plum and prune. Adult moths are 0.3 – 0.5 inches long, with light and dark gray mottled wings. Scales on the front of head cause the head to appear pointed. The larva is a caterpillar, about 0.5 inch long, with a dark brown head and distinctive, alternating light and dark bands on the body.

Larvae injure fruit trees by feeding on the buds and twigs early in the season, then the larvae bore into the shoots, causing a characteristic "flagging" or wilting of the new growth. Later generations of larvae feed within shoots or even on the fruit itself. Flagging of twigs indicates an infestation.

For chemical control management options review the PNW Handbook link below to select a control option appropriate for operation. Apply according to label directions.

For cultural controls prune out shoot strikes in the late spring and early summer as soon as they are detected to prevent these larvae from completing development and contributing to summer generations of the pest. If old shoot strikes are observed during pruning in late winter to early spring, plan to apply early season controls. Old strikes hold onto the dead leaves and appear as “flagged” terminals.

EPA Releases Temporary Guidance on Respiratory Protection for Agricultural Pesticide Handlers During COVID-19

All Crops    All Locations

Posted on: June 3, 2020 by Christy Tanner

The temporary guidance outlines approaches to address the unavailability of required respiratory protection and respiratory fit testing that should first be exhausted before considering any alternative options. Options include:
• Use alternative NIOSH-approved respirators offering equivalent or greater respiratory protection than those required on the pesticide label;
• Hire commercial applicator services with enough respirators and respiratory protection capabilities;
• Opt to use agricultural pesticide products that do not require respirators; or
• Delay pesticide applications until another compliant option is available.
If the above options are exhausted, EPA’s guidance provides additional options with strict terms, conditions, and exhaustion requirements to minimize potential incremental risks to workers:
• Reuse and extended use of disposable N95 filter facepiece respirator;
• Use of “expired” respirators;
• Use of respirators certified in certain other countries or jurisdictions meeting protective conditions outlined; or
• Delay the annual respirator “fit test.”
This is a temporary policy. EPA will assess the continued need for and scope of this temporary guidance on a regular basis. To read the guidance in full and to learn more about EPA’s Worker Protection Standard, visit this webpage: https://www.epa.gov/enforcement/statement-regarding-respiratory-protection-shortages-and-reduced-availability-respirator

COVID-19 Guidance for Ag Employers and Workers

All Crops    All Locations

Posted on: June 2, 2020 by Stuart Reitz

The CDC and US Department of Labor have released guidance to protect agricultural workers on farms and other work sites. Please take time to review the recommendations to maintain a safe work environment and reduce the spread of COVID-19 in your communities.

https://www.cdc.gov/coronavirus/2019-ncov/community/guidance-agricultural-workers.html

Ag Talk Tuesday - June 2

All Crops    All Locations

Posted on: June 1, 2020 by Juliet Marshall

Greetings!
This Tuesday (June 2) brings another Ag Talk Tuesday session of the season. These online interactive sessions occur every 1st and 3rd Tuesday of the growing season (May through August) from 11:00 AM to 1:00 PM MT and provide an opportunity for UofI and the ag industry to share and exchange information about current season crop issues. Featured topics are also presented.

After crop updates, the featured topics are "In-season nutrient management with soil and petiole sampling” with Linda Schott and
"Weed and chemical load on compost vs manure” with Mario E. de Haro-Martí.

You must Register in advance for this meeting:
https://uidaho.zoom.us/meeting/register/vpAkc-uvqTwpZF4DlEg_ZcN8xYE9ezZSkQ

After registering, you will receive a confirmation email containing information about joining the meeting.

If you have already registered, you will not need to register again.

Attached is a flyer for your use to help spread the word.

A schedule with featured topics is available here: https://webpages.uidaho.edu/extension-seed-potato/ATT.html Check back often as items are added regularly.

Sincerely,
Your Ag Talk Tuesday Organizers:
Kasia Duellman
Pamela J.S. Hutchinson
Juliet Marshall

2020 Western Cherry Fruit Fly - ISDA

Tree Fruits    Treasure Valley

Western Cherry Fruit Fly (Rhagoletis indifferens)

Posted on: May 29, 2020 by Paul Castrovillo, Ph.D.

On May 28 the first 2020 Western Cherry Fruit Fly captured in an Idaho State
Department of Agriculture WCFF trap was reported from Canyon County.
Historically we expect to find WCFF in Gem County traps about a week after
the first one is found in Canyon County.

Online phenology and degree-day models for WCFF predicted first flight on
May 24 in Ontario, May 27 in Caldwell and Emmett, May 28 in Parma and Boise
and May 30 in Nampa.

If treatment for WCFF is not already underway it should begin now.

For more information contact Paul Castrovillo at
paul.castrovillo@isda.idaho.gov or call 208-332-8627.

2020 Sequoia Pitch Moth in Pines

General Landscape and Garden    Treasure Valley

Sequoia Pitch Moth in Pines (Synanthedon sequoia)

Posted on: May 28, 2020 by Nic Usabel

The sequoia pitch moth (SPM) has been found in traps. Austrian pine, scotch pine, and other ornamental pines serve as host for the SPM. Primarily found in the truck and large branches where larvae feed on cambium tissue and sapwood. Larvae are found within large resin masses on bark or in a bark notch behind the resin mass.

Damage is primarily aesthetic causing unsightly resin masses on trees. Some trees may experience limb dieback, tree stress or tree death in severe cases. Trees under attack are almost always previously stressed.

There are no recommended insecticide control options for SPM. Management is gained with cultural control; properly plant and keep trees healthy, pick resin masses from the tree and crush larvae within. Avoid pruning or injuring trees April through August while adults are active.

2020 Western Cherry Fruit Fly

General Landscape and Garden    Treasure Valley

Western Cherry Fruit Fly (Rhagoletis indifferens)

Posted on: May 22, 2020 by Nic Usabel

A western cherry fruit fly sample was identified during the University of Idaho Extension, Canyon County Master Gardener plant clinic on May 22. Western cherry fruit fly adults are about 0.2 inch long. They have brownish to black wings with dark bands. White maggots infest cherries. The mature maggot makes a hole in the cherry as it exits. Flies overwinter as pupae in the soil.

Once the cherries start to blush (ripen to a salmon blush color) the fruits are susceptible to egg-laying by the adult females. Consider the maturity of the ripest fruit in the orchard when determining control methods. Spraying a product with the active ingredient kaolin can create a physical barrier that prevents females from laying eggs into the developing fruit. Follow label directions for application. For additional control options see the links below.

Current models indicate the degree days, as of May 21, between 1007 DD and 1030 DD depending on location. Forecasted degree days at 1060 DD is predicted to be May 24.

Ag Talk Tuesdays - May 19 - Register in Advance to Attend

All Crops    All Locations

Posted on: May 16, 2020 by Kasia Duellman, Juliet Marshall, Pam Hutchinson

Hello All:

Please join UI Extension Specialists, Extension Educators and ag professionals for Ag Talk Tuesdays. These sessions occur every first and third Tuesday, May through August. Listen to a featured presentation, hear crop pest and disease updates for the current season, engage with industry professionals, ask questions, provide your crop updates, or sit back and listen on your phone, tablet or laptop with Zoom.

Register in advance for this meeting (required):
https://uidaho.zoom.us/meeting/register/vpAkc-uvqTwpZF4DlEg_ZcN8xYE9ezZSkQ

Register once to be able to attend all 2020 sessions.

To learn more about Ag Talk Tuesdays and to view a schedule of featured presentations, please check the calendar here (check back often as new topics are added regularly): https://webpages.uidaho.edu/extension-seed-potato/ATT.html

After the sessions, read the Ag Talk Report newsletter - this newsletter provides a summary of Ag Talk Tuesday highlights, plus additional timely information that wasn't covered during the live session. The current issue and past issues can be found here:
https://webpages.uidaho.edu/extension-seed-potato/ATT.html

Please distribute this information far and wide.

Sincerely,
Kasia

--------------------------------------
KASIA M. DUELLMAN, Ph.D.
Assistant Professor and Extension Seed Potato Specialist

College of Agricultural and Life Sciences
Entomology, Plant Pathology and Nematology
kduellman@uidaho.edu
webpages.uidaho.edu/extension-seed-potato/
208-757-5476 | 701-793-9456 (Cell)
U of I Idaho Falls | 1776 Science Center Drive, Suite 205 | Idaho Falls ID 83402 | United States

2020 Leafminer in Leafy Greens

General Landscape and Garden    Treasure Valley

Leafminer (Liriomyza spp.)

Posted on: May 14, 2020 by Nic Usabel

The leafminer (Liriomyza spp.) can be destructive to beets, spinach, chard, and other leafy greens. Leafminer describes the larval stage of various insects but are most commonly those that feed on vegetables. The adults are small black to gray flies with yellow markings in order Diptera.

Leafminer larvae form visible tunnels (mines) as they feed within the leaf tissue affecting the market value of vegetables harvested for edible foliage. Larvae are nearly translucent white or yellow color and about 0.25 inch long when mature.

To control regularly check leaves for mines which are sometimes more visible on the underside. For home gardeners using floating row covers to exclude egg-laying females, removing and destroying infested leaves and preserving natural enemies (parasitic wasps) which help control leafminer populations. See links for additional management options for home and commercial use.

2020 Apple Codling Moth, First Generation Degree Day Update

General Landscape and Garden    Treasure Valley

Codling Moth (Cydia pomonella)

Posted on: May 12, 2020 by Nic Usabel

Data as of May 11, current degree day was 187. Please reference the previous alert at http://pnwpestalert.net/alerts/index/2020-apple-codling-moth-first-generation for more detailed management options.

Options A, 200 DD: Forecasted degree day for May 12 is 195 and May 13 at 202.
Option B, 220 – 250 DD: Forecasted degree day for May 15 is 214 and May 18 at 249.

2020 Apple Codling Moth, First Generation

General Landscape and Garden    Treasure Valley

Codling Moth (Cydia pomonella)

Posted on: May 8, 2020 by Nic Usabel

The first apple codling moths were trapped at the end of April (Biofix on April 25). Currently the degree day model is reporting 131 degree days (DD) as of May 7. There are different management options to consider when controlling this pest.

Option A: Starting at 200 DD, forecasted to be May 11, apply a mixture of water and horticultural oil at 1% concentration to smother egg infestation. Follow with first application of insecticide at 350 DD. Reapply insecticides based on the protection interval stated on the label.

Option B: Starting at 220-250 DD, forecasted to be May 14, apply insecticides that target newly hatched larvae. Reapply insecticides based on the protection interval stated on the label.

Reference publication links to view insecticide options for commercial or residential sites. Commercial products with the active ingredients including; spinetoram, acetamiprid, chlorantraniliprole, etc. Residential products with active ingredients including; lambda-cyhalothrin (restricted use pesticide), or esfenvalerate and Spinosad (general-use pesticides). Non-spray option is to bag the fruit.

This pest needs prevention all season long for clean fruit.

2020 Billbug Grub Control

General Landscape and Garden    Treasure Valley

Billbug Grubs

Posted on: May 6, 2020 by Nic Usabel

The term grub is used to designate the larvae of lawn damaging insects. In Idaho, the most common and destructive is the billbug. There are four species of billbug in Idaho: Bluegrass, Rocky Mountain, Phoenix, and Hunting.

Current degree day modeling indicates that 30% of adult billbugs are present with a forecasted 50% adult billbug activity on May 23. If you commonly experience billbug damage, your neighborhood experiences billbug damage, or you have Kentucky Bluegrass this timeframe can be used to apply a systemic insecticide for controlling billbugs if you desire.

Nonchemical control methods include selecting turf varieties of tall fescue, fine fescue, and perennial ryegrass. Select endophytic cultivar(s) in which a fungus produces a compound toxic to grubs.

Systemic insecticide control is most effective. Choose a product that lists one of the following active ingredients: chlorantraniliprole, clothianidan, imidacloprid, or thiamethoxam. Follow label instructions to ensure safety and success.

2020 Peach Leaf Curl Detected

General Landscape and Garden    Treasure Valley

Peach Leaf Curl (Taphrina deformans)

Posted on: May 4, 2020 by Nic Usabel

The Master Gardeners operating the University of Idaho Extension, Canyon County plant diagnostic clinic have identified samples of peach leaf curl. Peach leaf curl is caused by a fungus (Taphrina deformans) and there are no management options after infection has set in. Dispose of symptomatic leaves which fall to the ground. Control can be achieved in the fall with a single application of fungicides after 90% of leaves have fallen. A follow-up alert with control options will be sent in the fall.

Spores of this fungus overwinter on bark, twigs, and old infected leaves. Infection occurs through bud scales in mid- to late winter just as buds begin to swell. Slow growing shoots and leaves can be infected during cool and wet growing seasons. Maximum susceptibility is between bud break and petal fall.

Lygus Bug - Alfalfa Seed 2020

Alfalfa Seed    Treasure Valley

lygus bug

Posted on: May 4, 2020 by Jerry Neufeld

The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition shows that, depending on your location in the Treasure Valley, we have accumulated 242 growing degree days between January 1, 2020 and May 4, 2020. This is 6 days ahead of 2019, and 4 days ahead of the 30-year average. Peak emergence of lygus bug 1st and 2nd instar nymphs should occur right around 272 accumulated growing degree days; this will occur around May 8, and is the time monitoring for lygus bugs in alfalfa seed fields should begin.

When using most insecticides, fields should be treated when numbers of lygus bugs reach 4-5 lygus bug nymphs per 180 degree sweep. Growers using Assail, or Beleaf, as stand-alone sprays probably should treat before 4th instar nymphs are detected.

Below are the instructions for using the degree day calculator.

1) Select the location nearest you by selecting the appropriate pin in the map at the top of the page. The above data are for the Parma location. Results likely will vary depending on the location selected.

2) Select “insects” in the category drop down box under the map, then select the “Lygus bug [alfalfa seed] Ben Simko 2000” model from the “Select model” link to the right of the Model box. It should be model 61 in the list.

3) The predicted date for the 275 degree day accumulation for peak 1st and 2nd instar lygus nymphs will be listed in the “DDs Event” text box. You also can view the full model output by selecting the button labeled “Click here to CALC/ RUN model w/daily output.”

Also, below is the link to the “alfalfa seed-lygus bug” page in the PNW Insect Management Handbook.

Ag Talk Tuesday May 5 - Register in Advance

All Crops    All Locations

Posted on: May 4, 2020 by Juliet Marshall, Kasia Duellman

To: Producers, fieldmen, agronomists, consultants and others in ag
From: Kasia Duellman, University of Idaho Extension Specialist
Re: 2020 UofI Ag Talk Tuesdays

Greetings!

You are invited to attend the 2020 sessions of Ag Talk Tuesday. Ag Talk Tuesdays for 2020 kick off next Tuesday May 5, from 11:00 AM to 1:00 PM. You can attend by Zoom on your computer or you can call in on your phone. More information on what Ag Talk Tuesdays are and an agenda for each session can be found here: https://webpages.uidaho.edu/extension-seed-potato/ATT.html

Check back often as featured topics are added. Registration is required.

Register in advance to attend: https://uidaho.zoom.us/meeting/register/vpAkc-uvqTwpZF4DlEg_ZcN8xYE9ezZSkQ

Once your registration is approved, you will receive instructions on how to join the meeting by Zoom or by your phone.

We hope you can fit these sessions in your busy schedule. The more participation we have, the more interesting and relevant these interactive sessions will be. Listen to Featured Topics, ask questions, provide insight from your own experiences as the season progresses and as issues arise, participate in discussion, or just listen in. A follow up newsletter, The Ag Talk Report, will be released after each session to give more info on topics discussed and those not broached.

Wishing you a productive season!

Sincerely,
Kasia
--------------------------------------
KASIA M. DUELLMAN, Ph.D.
Assistant Professor and Extension Seed Potato Specialist

College of Agricultural and Life Sciences
Entomology, Plant Pathology and Nematology
kduellman@uidaho.edu
webpages.uidaho.edu/extension-seed-potato/
208-757-5476 | 701-793-9456 (Cell)
U of I Idaho Falls | 1776 Science Center Drive, Suite 205 | Idaho Falls ID 83402 | United States

2020 Lilac-Ash Borer

General Landscape and Garden    Treasure Valley

Lilac-Ash Borer Podosesia syringae

Posted on: April 29, 2020 by Nic Usabel

The lilac-ash borer (Podosesia syringae), a clear-wing moth, can be a destructive pest of many species of ash (Fraxinus spp.), previt (Ligustrum spp.), lilac (Sryinga spp.).

The Lilac-ash borers have been caught in traps. Adults are short-lived and typically deposit all eggs within a week after emergence. The first spray should be applied 10-20 days after adult emergence, approximately May 5, before the larvae bore into the trunk. Spray should be applied to the trunk and larger limbs, follow label instructions for application and reapplication depending insecticide selected.

Primary insecticides include permethrin (group 3A), bifenthrin (group 3A) and endosulfan (restricted use; group 2A). Please note that imidacloprid (group 4A), a systemic insecticide, is ineffective against lilac-ash borer and should not be used.

Diversifying species in the landscape, maintaining optimum plant health, monitoring, and preventive sprays (if necessary) are the best methods for preventing infestations. Only preventative treatments exist.

Malheur County Onion Maggot Control

Onion    Northern Idaho

Onion Maggot

Posted on: April 28, 2020 by Stuart Reitz

Please remember the Malheur County Onion Maggot Control order remains in effect until July 1 mandating the proper disposal or treatment of culls, including volunteers, to protect this season’s onion crop. If you have questions or concerns regarding the Order, please contact Casey Prentiss (see his contact below).

Malheur County Onion Maggot Control Order

The Onion Maggot Control Order 603-052-0360 for Malheur County requires that all cull or waste onions in Malheur County have to be disposed of by a method approved of within this control order prior to March 15th each year. The objective of the control order is to protect the onion industry from the Onion Maggot pest.

Please keep in mind that the cull onion disposal order remains in effect and will be enforced through July 1. All cull or waste onions are required to be disposed of, plowed under and covered by 12 inches of onion-free soil by March 15th at the latest. Additionally, for cull onions produced after the March 15 deadline until July 1 the Control Order permits only a maximum of one week for proper disposal.
Culls include “volunteer” onions growing in last season’s fields, which may be planted to another crop at this time. Because the Control Order remains in effect until July 1, volunteer onions still need to be disposed of or treated properly.

The Onion Maggot Control Order offers several disposal options:

A) Disposal by covering in a dump site approved by the Oregon Department of Environmental
Quality (DEQ). Culls and onion debris shall be dumped and covered by at least 12 inches of onion-free soil by March 15 each year;

(B) Disposal by animal feeding: Culls and onion debris shall be completely removed from feeding areas by March 15 and buried under 12 inches of onion-free soil. Onions tramped into the soil so they cannot be removed shall be plowed to a depth of 12 inches;

(C) Disposal by chopping or shredding: Chopped or shredded onion debris that is incapable of
sprouting may be returned to the field at the DEQ-approved tonnage rate which is no higher than 80 tons per acre and plowed to a depth where no onion parts are exposed on the surface;

(D) Composting: All onion debris shall be incorporated into the compost bed and completely covered by 12 inches of onion-free soil;

(E) Disposal of residue in onion producing fields: Commercial onion fields where sort out bulbs are left at harvest shall be disked to destroy the bulbs and shall be plowed to a depth of at least 12 inches by March 15 each year. Seed bulbs shall be disposed of in the same manner following the last harvest;

(F) Culls may be treated with an EPA-labeled insecticide. David Priebe of the ODA Pesticides Program has provided a list of insecticides that can be sprayed on wheat and/or sugar beet fields for onion maggot control. Please see the link below.

Please contact the Ontario ODA office at 541-889-5274 or Casey Prentiss directly at 541-212-3361 cprentiss@oda.state.or.us

2020 Fire Blight - Model Predicts Outbreak Conditions High April 28 - May 2

Apple    Treasure Valley

Fire Blight

Posted on: April 27, 2020 by Nic Usabel

Fire blight is a bacterial plant disease that causes infections through open flowers on apple and pear (Rosaceae family). Infections occur during warm, wet days.

Based on the model, there is a very high potential for infection on open blossoms April 28 – May 2. Fire blight is a disease that needs moisture (precipitation, dew) to cause infection. Higher upcoming temperatures increase the chance for infection with precipitation or dew moisture. Protect the blossoms of young trees and trees that had fire blight last year.

Monitor trees closely starting two weeks after bloom and prune out new infections immediately during dry conditions.

Refer to publications below for additional control methods for your application.

Sugarbeet Root Maggot - 2020

All Crops    All Locations

sugarbeet root maggot

Posted on: April 27, 2020 by Jerry Neufeld

The growing degree day calculator (gdd) (hosted by the Integrated Plant Protection Center at Oregon State University; http://uspest.org/cgi-bin/ddmodel.us) for the sugarbeet root maggot fly shows that—depending on your location in the Treasure Valley—we have accumulated 282 gdd since March 1, 2020 and 177 gdd in the Magic Valley. Peak flight of root maggot flies should occur after 360 accumulated gdd when the maximum high temperature exceeds 80 degrees F. In the Treasure Valley this will be about May 3, in the Magic Valley this will be about May 16. The gdd model does an excellent job of predicting peak flight, but monitoring with orange sticky stake traps is the best way to get local information on fly numbers for a given field to determine if you have the threshold numbers of flies.

Root maggot flies will lay eggs near sugarbeet plants. After the larvae hatch they will begin feeding on the young sugarbeets. Look for these pests to appear in the western end of the Treasure Valley first. The optimal timing for applying granular insecticides against root maggots is within 10 days of peak flight. Granular insecticides must be watered in well to get good uptake by the sugarbeets. The link below from the 2020 PNW Insect Management handbook contains additional information about the sugarbeet root maggot control. I have also attached the links to “ Growing Degree Days (GDD)
Root Maggot Emergence Control” and “Economic Threshold for Sugarbeet Root Maggot Calculator.” These are calculators developed by The Amalgamated Sugar Company.
In addition, I have attached a link to the University of Idaho publication entitled “Sugarbeet Root Maggot; Identification, Biology and Management.” TASCO would like you to visit with your field consultant for treatment options.

Adjusting Cropping Systems Due to Market Impacts from COVID19

All Crops    All Locations

Posted on: April 25, 2020 by Juliet Marshall

ADJUSTING CROPPING SYSTEMS AFFECTED BY THE COVID-19
Walsh, O.S., Cropping Systems Agronomist, University of Idaho, Parma R&E Center
Thornton, M., Plant Scientist, University of Idaho, Parma R&E Center
Marshall, J.M., Cereal Cropping Systems Agronomist and Pathologist, Aberdeen R&E Center
Morishita, D., Weed Scientist, University of Idaho, Kimberly R&E Center (retired)
Felix, J., Weed Scientist, Oregon State University, Malheur Experiment Station
and Hatzenbuehler, P.L., Agricultural Economist, University of Idaho, Twin Falls R&E Center

The agricultural sector has begun to struggle with the negative impacts of the COVID-19 pandemic. The economic shocks on Idaho and Oregon agricultural industries have hit dairy, beef onion, and potato producers particularly hard. This is partially driven by the school and restaurant industry closures, where mass quantities of these products are typically utilized. Thus, the impact has been more immediate and direct compared to other commodities.
Following the shelter-in-place orders in Idaho and Oregon, the negative effects of the reduction in food consumption are now coming to light. Most crop producers implement yearly rotations – alternating the annual crops grown on a specific field in a planned pattern in successive crop years. Many Idaho and Oregon growers have been forced to cut their planned potato, barley and onion acreage due to loss of processing contracts for the 2020-21 crop year. With planting under way, many farmers are looking for ways to sustain their productivity.
Adjusting crop rotations may enable producers to stay profitable. Planting different crops such as small grain cereals, beans or corn are some options that may be appropriate for acres initially intended for potatoes and onions. Agricultural practices such as fertilization, herbicide and other pesticide applications already completed last fall and/or this spring are some of the key practices that must be considered. Agricultural inputs that have already been applied could have a significant impact on the alternative crops eventually planted in those fields. Finally, there may be serious implications if the fields are replanted to the same crop as in the previous year. To help growers make more informed planting decisions this spring, the University of Idaho and Oregon State University researchers put the following guidelines in place.

Nutrients/soil fertility
Situation:
• Most onion and potato fields receive relatively low rates of nitrogen fertilizer (less than 100 pounds per acre) prior to planting.
• Both crops traditionally receive high applications of phosphorus and potassium at the time of bedding in the Fall.
Recommendations:
• Take a new soil sample (2 ft depth) now to determine the current levels of nutrients in each field. For soil testing instructions, please refer to Soil Sampling guide.
• If the soil contains more than 150 pounds of nitrogen per acre in 2 ft sample – beans are not recommended (excessive nitrogen in the soil will hinder nodulation in bean roots). If soil nitrogen levels suggest that a bean crop may be successful in a field, levels of phosphorus and potassium must be considered. If the soil contains at least 120 ppm of potassium in the 12 inch-sample – no additional potassium fertilization is required. Furthermore, soils containing more than 30 ppm (12-inch sample, Olson) require no additional phosphorus, even at the highest free lime content. For complete information regarding bean crop nutrient management, please refer to the Southern Idaho Fertilizer Guide: Beans.
• Spring wheat may be a good choice for the fields relatively high in nitrogen. An irrigated soft white spring wheat crop with a yield potential of 120 bushels per acre (typical for southern Idaho) requires a total of 240 pounds of nitrogen per acre. As a rule of thumb, two pounds of available nitrogen per bushel are required for irrigated soft white spring wheat. Hard red and white spring wheat requires additional nitrogen, in the range of 2.5 to 3.0 pounds of nitrogen per bushel with additional nitrogen top-dressed at heading to flowering to meet protein requirements. For detailed information on spring wheat nutrient management, refer to Southern Idaho Fertilizer Guide: Irrigated Spring Wheat. Please note, that high levels of phosphorus (above the 20 ppm in the top 12-inch soil sample) may reduce wheat yields. Although addition of potassium to wheat is not required at more than 75 ppm (12-inch soil sample), higher potassium levels should not cause issues for wheat growth.
• Silage corn may be another good option for fields high in nitrogen. For a silage yield of 40-50 tons per acre, at least 100 pounds of nitrogen in the soil (based on the 2 ft soil sample) are recommended. Higher levels of potassium and phosphorus are not an issue for most corn hybrids. For complete information, please refer to Nutrient Management for Field Corn Silage and Grain. Sileage varieties of wheat, triticale and barley are also available.

Herbicides and other pesticides
Situation:
• Most potato fields should not have received herbicides yet. Many onion fields would have had Dual Magnum applied last Fall and may have gotten an application of a soil residual herbicide (Ex. Prowl or Nortron) this Spring.
• Furthermore, fumigants may have already been applied last Fall or this Spring.
Recommendations:
• Make sure to check the label for all pesticides that have been applied to determine plant back restrictions.
• Fields that have received Dual Magnum are suitable for both beans and corn (forage, grain or sweet) planting. Herbicides such as Dual Magnum and Prowl would eliminate the possibility of planting small grain cereal crops like spring wheat or barley.
• Fumigants should not impact subsequent crops. If fumigants have been applied, there should be no damage to the crops themselves, just the additional expense associated with application.

Additional considerations
• For cereals, expect a reduction in yield associated with soil-borne pathogens. Use certified seed with appropriate seed treatments, and plant to a uniform seed depth of about 1 to 1.5 inches in good moisture to allow rapid emergence. Make sure volunteer grasses (including cereals) are removed two-three weeks prior to planting.
• Regarding farm management, the Farm Bureau has several resources available online to help keep you and your staff stay safe and physically and mentally healthy. Such resources include draft email templates to send to staff to inform them of protocols and procedures that are being and/or will be instituted to ensure the safety and health of all is maintained throughout the growing and harvest seasons (https://www.fb.org/land/impact-covid19-on-ag).
• Ensuring that best practices for crop and commodity storage are maintained may help provide opportunities for sales later in the current crop year or early in the 2020-21 crop year as supply chains are re-established or alternative supply chains emerge.
• For cash flow considerations, USDA ARC/PLC program payments for the 2019-20 crop year are expected to be made in October 2020. PLC payments for producers with base acres in wheat remain likely despite an upward change in the estimated marketing year average (MYA) price 2019-20 in the USDA WASDE report for April 9, 2020 from the March report (from $4.55/bu to $4.60/bu, with a reference price of $5.50/bu). The 2019-20 barley MYA remained unchanged at $4.60, and a PLC payment is still expected due to a reference price of $4.95/bu. The MYA price for corn was revised downward from $3.80/bu to $3.60/bu, so a PLC payment may now also be made for corn (reference price of $3.70/bu).
• Uncertainty remains regarding eligibility, payment rates, and timeline for USDA administered agricultural producer payments under several bills enacted by Congress in response to the COVID-19 pandemic. However, the payments made under the discretion Office of the Secretary of the USDA are likely to be allocated to specialty crops (including potatoes) and other agricultural industries (such as cattle) not covered under Farm Bill Title I (except dairy is expected to be included in both). More details will be provided by the USDA will be forthcoming, but payments may likely occur around October 2020 as is planned with the PLC/ARC programs (https://www.usda.gov/media/press-releases/2020/04/17/usda-announces-coronavirus-food-assistance-program).

Please Wait... Your request is being processed...