Search Results
Your search for "All Alerts" in All Alerts
yielded 2122 results.
Swipe Left or Right to navigate Alerts
Need Pesticide Credits?
All Crops All Locations
Posted on: July 12, 2022 by Jerry Neufeld
The University of Idaho Pesticide Safety Education Program will be offering a three credit webinar recertification series on August 2, 9, and 16. Click on the pdf below for more information.
2022 Miller Research Potato Pest Management Field Day
All Crops All Locations
Posted on: July 8, 2022 by Jeff Miller
Miller Research will be holding its annual potato pest
management field day on Wednesday, August 17. The event is open to the public
and there is no cost to attend but
please RSVP so we can plan appropriately for the event. This can be
done on our website or by responding to cheryn@millerresearch.com or (208)
431-4420.
The field day will begin at the field located at the main
office at Miller Research at 422 E 200 N in Rupert (42.649075 N, -113.585594
E).
A detailed agenda and additional information can be found at the link provided here.
» https://millerresearch.com/event/2022-miller-research-potato-pest-management-field-day/
2022 Potato psyllid monitoring program underway in Idaho
Potato All Locations
potato psyllid
Posted on: July 7, 2022 by Erik Wenninger
The University of Idaho and our crop consultant collaborators across the state are once again monitoring for potato psyllids, zebra chip disease (ZC), and liberibacter (Lso), the bacterium associated with ZC. The monitoring program covers commercial potato fields throughout southern Idaho and is funded in part by the Idaho Potato Commission and generous in-kind contributions by our cooperators.
Our official monitoring season began with wide deployment of traps last week and will continue for 10 to 12 weeks. We have 72 fields across the state this year, using 4 sticky traps per field at all sites.
This week we had traps deployed in 64 fields, though we are still waiting for traps to come in from three fields. We found a total of 12 psyllids across 7 (11%) of the fields for which we have data. We have been monitoring three fields at the Kimberly Research & Extension Center since mid-May, and, interestingly, this week is the first that we have found potato psyllids. In previous years we nearly always captured psyllids here before the end of May.
Psyllids were captured in the following counties: Canyon (3 fields), Owyhee (1 field), Twin Falls (2 fields), and Minidoka (1 field).
We expect to have results on Lso incidence next week in addition to “heat maps” and additional details.
More information on psyllid monitoring and management can be found here:
https://www.uidaho.edu/cals/potatoes/news/psyllid-management
Details on weekly trap captures can be found here:
https://docs.google.com/spreadsheets/d/1av-jeEKrbDfYis-eS9nB-ZcKzazXyMWmz7NSAiyt3Go/edit?usp=sharing
» https://www.uidaho.edu/cals/potatoes/news/psyllid-management
» https://docs.google.com/spreadsheets/d/1av-jeEKrbDfYis-eS9nB-ZcKzazXyMWmz7NSAiyt3Go/edit?usp=sharing
2022 Turfgrass Mowing Height & Watering
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Turfgrass Mowing Height & Watering
Posted on: July 6, 2022 by Ruth Givens
MOWING
The weather is warming and now is the time to check the mowing height at which your turfgrass is cut. Increasing the length of grass blade encourages a deeper root growth and provides more shade cover of the soil surface reducing water evaporation.
For summer mowing height Kentucky bluegrass and fine fescue are recommended to be maintained at 3 inches, perennial ryegrass at 2 inches, and tall fescue at 4 inches. Ensure that the mower blade is sharp and follow the one-third rule; remove no more than one-third of the leaf growth each mowing.
Grass clipping which are left on the lawn by mulching decompose quickly, feed soil organisms, recycle plant nutrients, and increase organic matter in the soil.
WATERING
The goal of irrigation is to keep the lawn healthy when rainfall is not dependable. The key is to moisten the top 12 inches of the root zone. Watering deeply (10 to 12 inches) but infrequently produces healthy turf. Practicing deep watering reduces weed populations, benefits landscape trees and shrubs, increases water use efficiency, and forces an exchange of soil atmosphere with each irrigation. Early morning is the best time to water.
Determining how deep irrigation water goes can be done by using a soil probe or shovel to check soil moisture the day after irrigation. At 10 to 12 inches deep the soil should feel slightly damp. If the soil feels dry at the 10- to 12-inch depth increase the duration of water application to fill the root zone. As weather conditions change adjust the frequency of irrigation to maintain plant available water in the root zone.
Identifying or knowing soil type will help to determine the frequency of water application, rate of water infiltration, and the soils water holding capacity. For example, heavy clay soils have a greater water holding capacity, but have a slower infiltration rate (speed at which water enters the soil). These soils can be watered less frequently (once a week or less) and may need multiple application of water on day of watering to allow water to move into the soil. Sandy soils have less water holding capacity and a greater infiltration rate. These soils need to be watered more frequently to maintain comparable turf.
For a more calculated approach to water application reference the publication links below.
https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1098.pdf
https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1157.pdf
Powdery Mildew and Cercospora in Sugarbeets
Sugarbeets All Locations
powdery mildew and cercospora
Posted on: June 30, 2022 by Jerry Neufeld
Powdery mildew and Cercospora leaf spot have been found by Amalgamated Sugar Company Crop Consultants in sugarbeet fields in the western Treasure Valley. There are several fungicides available for use to treat these diseases. Depending on the disease pressure and chemistry used, applications with different chemistries should be repeated every 14-21 days. Please be advised that strobilurins could show reduced efficacy due to fungicide resistance in powdery mildew. Always tankmix with at least 5 lbs of sulfur for resistance management purposes when treating against powdery mildew. For the same reason, use a copper product as tank mix partner when treating against Cercospora. DO NOT MIX COPPER AND GLYPHOSATE. Contact your Crop Consultant from The Amalgamated Sugar Company LLC if you have any questions.
Click on the links below for the powdery mildew and cercospora pages in the PNW Plant Disease Management Handbooks.
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-powdery-mildew
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-cercospora-leaf-spot
2022 Squash Bug (Anasa tristis)
General Landscape and Garden Treasure Valley
Squash bug (Anasa tristis)
Posted on: June 30, 2022 by Maria Held
2022 Squash Bug
Squash
bugs eggs have been reported in Canyon County by the Canyon County Master
Gardener Integrated Pest Management (IPM) Team in Caldwell. Adults have been spotted by a Master Gardener in
Meridian. It is time to check the
underside of cucurbit (pumpkins and squash are the most attractive) leaves for
the bronze-colored egg clusters. In addition, monitor plants for nymphs, adults
and plants wilting.
Management:
Wooden
boards, shingles, or heavy cardboard can be placed on the ground next to the
host plant. Squash bugs tend to move under the board/object at night. In the
morning, turn the object over and destroy the pest.
Hand-pick
and destroy adults, nymphs, or egg clusters. Other options include rolled duct
tape around fingers to pull off egg clusters, cutting off the egg part of the
leaf or applying petroleum jelly directly to the eggs. Increased success is
achieved when started early in the season and done every 2 to 3 days to keep
numbers low.
Cultural
methods include sanitation, plating squash varieties that are more tolerant of
squash bug feeding, crop rotation, and time of planting.
Additional
control methods can be found in the linked publications.
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/common-vegetable/vegetable-crop-squash-bug
» https://extension.usu.edu/pests/ipm/notes_ag/veg-squashbug
Ag Talk Tuesday - next session July 5
All Crops All Locations
General announcement - all crops
Posted on: June 29, 2022 by Kasia Duellman
The next session of the University of Idaho's Ag Talk Tuesday series features Travis Youngberg (NRCS), who will present on "Sustainable, regenerative and other buzz words." The session starts at 11:00 AM (MT) and registration is required to attend (register once to attend all 2022 sessions).
Current season crop updates precede the featured presentation, and all ag-related (soil, water, nutrient, pest, weed, disease) issues for all crops large or small (throughout Idaho and the region and even the world!) may be represented in these engaging, interactive round-table discussions.
Join us July 5 at 11:00 AM (MT).
Registration information is available by following this link: https://www.uidaho.edu/extension/news/ag-talk-tuesday
2022 Peachtree Borer
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Peachtree Borer
Posted on: June 29, 2022 by Ruth Givens
Peachtree bores are predicted to emerge between July 2 and July 5. 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.
The following links have information about the life cycle of peachtree borer and control methods.
https://pnwhandbooks.org/insect/tree-fruit/peach-nectarine/peach-nectarine-peachtree-borer
https://extension.colostate.edu/topic-areas/insects/peach-tree-borer-5-566/
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1651&context=extension_curall
2022 Peach Twig Borer
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Peach Twig Borer
Posted on: June 22, 2022 by Ruth Givens
It is time for management of the peach twig borer, based on degree days. 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.
https://pnwhandbooks.org/insect/tree-fruit/peach-nectarine/peach-nectarine-peach-twig-borer
https://climate.usu.edu//includes/pestFactSheets/Peach-Twig-Borer.pdf
Ag Talk Tuesday - June 21, 2022
All Crops All Locations
Posted on: June 17, 2022 by Kasia Duellman
Olga Walsh (owalsh@uidaho.edu)
TOUR DATE CHANGED to JUNE 28TH - Aberdeen Snake River Weed Mg Tour and Field day
All Crops All Locations
Posted on: June 17, 2022 by Pamela Hutchinson
CHANGE THE DATE OF THE Aberdeen Snake
River Weed Mg Tour and Field day
Tuesday JUNE 28TH
instead of June 21st.
Please pass the word
- Registration
8:30 to 9aTour
9a to noon - Followed
by a sponsored lunch. - You
do not need to Pre-register / RSVP
Three
Idaho pesticide recertification credits will be available.
Kimberly does NOT change – will still be held Wednesday June 22nd.
Featured
on the Aberdeen R&E Center Tour Tuesday June 28th
- Herbicide tank mixtures for use in potatoes; Potato variety herbicide tolerance; Simulated Excess
Rainfall Effects on Herbicides and Potato Crop Safety; Herbicide site of action
demonstration. - Weed control in quinoa; Herbicide management in Litchi tomato; Fiber hemp herbicide tolerance.
- In
addition - Updates from: USDA/University of Idaho potato breeding, Potato disease management, Seed potatoes, Barley and Wheat production and varieties.
Stripe (Yellow) rust found in Filer / Buhl area
All Crops All Locations
Stripe rust (yellow rust) in wheat
Posted on: June 17, 2022 by Juliet Marshall
With the spring weather perfect for small grain production, it is no surprise that stripe rust was finally confirmed in southern Idaho. Thanks and a free lunch goes to Trenton Stanger, Westbred, for the first reported sighting in breeding plots near Buhl. The breeding line was significantly infected, but isolated (that is, infections were not widespread in the field). Most of the plots were just past flowering, and there is a long way to go for the winter crop to finish. We are about 10-14 days behind the previous years according to growing degree day estimates. (Be sure to check plant growth stage prior to shutting off irrigation. You don't want to shut off irrigation too soon or too late - remember the general rule of thumb of "Full soil profile of moisture at soft dough before water shut off.")
We are past the window of application for fungicides for winter wheat, and the stripe rust disease pressure is low.
The greatest threat will be for susceptible spring wheat varieties. Scout spring wheat fields for infection, and report infections to University personnel in order for us to track and report new occurrences. Fungicide applications will likely not be required for moderately resistant and resistant varieties. Fungicides on the market are equally effective as stripe rust protectants, but as the flag leaves emerge, do not use strobilurin fungicides as that increases risk for DON contamination in grain from FHB or scab infection.
Remember to read and follow all label directions.
2022 Western Cherry Fruit Fly
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Western Cherry Fruit Fly
Posted on: June 3, 2022 by Ruth Givens
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. For additional control options see the links below.
Forecasted degree days at 1060 DD is predicted to be June 4.
http://treefruit.wsu.edu/crop-protection/opm/western-cherry-fruit-fly/
https://climate.usu.edu//includes/pestFactSheets/WC-Fruit-Fly.pdf
https://pnwhandbooks.org/insect/tree-fruit/cherry/cherry-western-cherry-fruit-fly
The Ag Talk Report and the next Ag Talk Tuesday session
All Crops All Locations
General announcement - all crops
Posted on: June 1, 2022 by Kasia Duellman
The first issue of 2022 for the Ag Talk Report, a newsletter that supplements the Ag Talk Tuesday series, is now available. Previous issues are available online at the Ag Talk Tuesday website: www.uidaho.edu/ag-talk
The next Ag Talk Tuesday session is Tuesday, June 7. Join us for a panel discussion on herbicide resistant weeds in Idaho. Registration is required (one time registration allows you to attend all sessions in 2022). Find the link to register on the Ag Talk Tuesday website.
Agronomic Soil Testing Class - Online
All Crops All Locations
Posted on: May 31, 2022 by Stuart Reitz
This online course is designed for crop advisors, agronomists, and others testing soil on farms or in laboratories. The course is led by Oregon State University Extension Soil Fertility Specialist, Dr. Amber Moore.
Lecturers: Various OSU Extension Agronomists and Soil Scientists
Time commitment: 1-3 hours per week for 6 weeks. The 19 lecture modules can be accessed at your convenience.
Cost: $495 (+$60 registration fee)
CCA Continuing Education Units: Six Nutrient Management CEUs
Course topics include:
• Choosing a Soil Testing Lab
• Soil pH and Buffer pH
• Extractable Cations
• Nitrate and Mineralizable Nitrogen
• Phosphorus, Potassium, and Sulfate
• Micronutrients
• Salts (Electrical Conductivity)
• Organic Matter & Carbon
• Soil Health Indicators
Registration Link:
https://workspace.oregonstate.edu/course/agronomic-soil-testing
» https://workspace.oregonstate.edu/course/agronomic-soil-testing
2022 Apple Codling Moth, First Notification
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Apple Codling Moth
Posted on: May 25, 2022 by Ruth Givens
The first apple codling moths were trapped in mid May . Currently the degree day model is reporting 201 degree days (DD) as of May 25. There are different management options to consider when controlling this pest.
Option A: Starting at 200 DD, forecasted to be May 25, 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 28, 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.
https://pnwhandbooks.org/insect/tree-fruit/apple/apple-codling-moth
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1879&context=extension_curall
https://extension.colostate.edu/topic-areas/insects/codling-moth-control-in-home-plantings-5-613/
2022 Apple Codling Moth, First Generation
All Crops Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Apple Codling Moth
Posted on: May 25, 2022 by Ruth Givens
The first apple codling moths were trapped in mid May . Currently the degree day model is reporting 201 degree days (DD) as of May 25. There are different management options to consider when controlling this pest.
Option A: Starting at 200 DD, forecasted to be May 25, 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 28, 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.
https://pnwhandbooks.org/insect/tree-fruit/apple/apple-codling-moth
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1879&context=extension_curall
https://extension.colostate.edu/topic-areas/insects/codling-moth-control-in-home-plantings-5-613/
2022 Lilac-Ash Borer Control
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Lilac-Ash Borer
Posted on: May 23, 2022 by Ruth Givens
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 reached the degree days sufficient for emergence. 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 25- June 15, 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.
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1920&context=extension_curall
https://extension.colostate.edu/docs/pubs/insect/05614.pdf
https://pnwhandbooks.org/insect/hort/landscape/hosts-pests-landscape-plants/ash-fraxinus-ash-borer
https://pnwhandbooks.org/insect/hort/landscape/hosts-pests-landscape-plants/lilac-syringa-ash-borer
Lygus Bug in Alfalfa Seed - 2022
Alfalfa Seed Treasure Valley, Treasure Valley - Idaho, Northern Idaho
lygus
Posted on: May 16, 2022 by Jerry Neufeld
The western tarnished plant bug (Lygus hesperus) 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 240 growing degree days between January 1, 2022 and May 16, 2022. Peak emergence of lygus bug 1st and 2nd instar nymphs occurs around 277 accumulated growing degree days. Using the predicted degree day model, peak emergence is predicted to occur on approximately May 22. We suggest growers monitor for lygus bugs in alfalfa seed fields starting very soon.
When using insecticides, fields should be treated when the numbers of lygus bugs reach a management threshold of 4-5 lygus bug nymphs per 180-degree sweep. Follow all insecticide labels and recommendations, including targeting the correct life stage.
The link below will take you to the PNW Insect Management Handbook for lygus.
» https://pnwhandbooks.org/insect/legume-grass-field-seed/alfalfa/alfalfa-seed-lygus-bug
Ag Talk Tuesday - May 17th at 11:00 AM Mountain
All Crops All Locations
Ag Talk Tuesdays
Posted on: May 16, 2022 by Juliet Marshall
May 17 — FSA programs and policies — Matt Gellings, Ben Thiel — Doug Finkelnburg (host)
Olga Walsh (owalsh@uidaho.edu)
| KASIA M. DUELLMAN, Ph.D. Assistant Professor of Plant Pathology and Extension 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 |
2022 Billbug Grub Control
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Billbug
Posted on: May 13, 2022 by Ruth Givens
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 June 4. 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.
- https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1204.pdf
- https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1860&context=extension_curall
- https://extension.colostate.edu/topic-areas/insects/billbugs-and-white-grubs-5-516/
Sugarbeet Root Maggot - 2022
Sugarbeets Treasure Valley, Treasure Valley - Idaho, Eastern Idaho, Magic Valley
sugarbeet root maggot
Posted on: May 10, 2022 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 330 gdd since March 1, 2022 and 258 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 15, in the Magic Valley this will be about May 22. This is a few days later than last year in both locations. 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. The link below will take you to the Sugarbeet Root Maggot Fly Monitoring readings for the Mini-Cassia and Upper Snake growing areas.
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 2022 PNW Insect Management handbook contains additional information about the sugarbeet root maggot control. I have also attached a link to the University of Idaho publication entitled “Sugarbeet Root Maggot; Identification, Biology and Management.” Amalgamated Sugar Company would like you to visit with your field consultant for treatment options.
As a reminder, all food uses of Lorsban/chlorpyrifos were cancelled, and tolerances revoked, by the U.S. EPA on February 28, 2022. There is not an "existing stocks" provision, so you cannot use any leftover Lorsban/chlorpyrifos you have on hand. No uses of any type are allowed on any food or feed crop.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
» https://www.extension.uidaho.edu/publishing/pdf/BUL/BUL942.pdf
2022 Spring Frost
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho
Posted on: May 9, 2022 by Ruth Givens
Many locations across the Treasure Valley could experience a frost this evening. To review more details about frost tolerance for common vegetables view the first link below. To understand more about cold weather and frost protection reference the second link.
- https://extension.sdstate.edu/fall-frost-tolerance-common-vegetables
- https://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1002.pdf
Grain production worldwide in dire straights
Small Grains All Locations
Cereal Production 2022
Posted on: May 4, 2022 by Juliet Marshall
All - I usually do not send pest alerts out like this with scary titles as I do not believe in “saber rattling”. But there are several situations occurring worldwide that are concerning to me in regards to wheat production.
1) The war in Ukraine - beyond the obvious disruption to everyday activities associated with agricultural production, the destruction of port cities and export infrastructure in addition to targeted destruction of grain and shipping facilities in Ukraine, and shipping of grain stores to Russia will reduce worldwide supplies. https://phys.org/news/2022-04-india-wheat-crop-snags-export.html
2) Heat wave in India - https://stories.app.goo.gl/6Gjk Temperatures above 110 degrees F in central India (46.5 degrees Celsius (114.08 Fahrenheit) have reduced grain production in some areas by as much as 50%.
3) Reduced production in China - https://www.reuters.com/business/china-ensure-agricultural-product-supplies-including-grains-2022-03-05/
BEIJING, March 5 (Reuters) - The condition of China's winter wheat crop could be the "worst in history", the agriculture minister said on Saturday, raising concerns about grain supplies in the world's biggest wheat consumer.
4) US production projections are for lower than average. From the Idaho Wheat Commission Newsletter on 4/29/22: Chicago wheat futures rebounded on Tuesday as the worst U.S. winter crop rating since 1989 put attention back on global supply already strained by the war in Ukraine.
Current conditions in Idaho and the PNW are favorable to winter wheat production with the greatest constraint associated with dry conditions. In fact, the extremely cool weather has delayed plant maturity, increasing the potential for heavy stooling of the wheat crop. Looking at data from the UI potato website, growing degree days are far behind previous years:
While data from Aberdeen is not available on Agrimet (https://www.usbr.gov/gp/agrimet/agrimet_station_list.html) comparing data from Kimberly and Parma show a rather surprising lag in GDD throughout southern Idaho.
WHAT DOES THIS MEAN FOR THIS YEAR’S GRAIN PRODUCTION IN IDAHO?
Heavy stooling increases yield potential for winter wheat and winter barley. While the weather is unpredictable, if the conditions stay favorable to grain growth, consider applications of plant growth hormones to reduce lodging. (If it is not too late in your area.)
Take advantage of the extra (and localized) rain events to increase subsoil moisture storage while irrigation is available. Yes, if you have irrigation, use it to increase soil storage capacity for later season moisture shortages, especially beneficial if prediction for hot and dry late spring and summer weather actually occurs.
Control yield-robbing weeds.
Scout for diseases. Stripe rust literally can annihilate wheat and barley production. The Good news is that we usually have low barley stripe rust disease pressure and wheat stripe rust forecasts from Dr. Xianming Chen are for low to moderate disease pressure in the Washington and Palouse areas. "Recommendations for the eastern Pacific Northwest - As stripe rust has not been found and the disease is likely to have a late start, fungicide application is not recommended in the early growth season at the time of herbicide application for winter wheat, unless stripe rust is observed in the fields.” Dr. Chen, 3/7/22 email.
Due to enduring drought conditions throughout the west (including CA and NV, downwind of southern Idaho production), I expect low disease pressure from stripe rust. I also do not recommend fungicide application at herbicide timing for stripe rust control, even in susceptible varieties. Always scout, and if sound, report stripe rust infections to me ASAP so I can get the word out.
Even if planted early, spring grains has gotten a delayed start due to cool conditions and emergence has been slow. If expected hot dry conditions develop in May through July, yield potential can be reduced with heat at flowering. A lot depends on (obviously) the temperatures as the season progresses.
Pay close attention to conditions at flowering for scab (Fusarium head blight) and potential mycotoxin contamination from DON.
When crops are harvest ready, get them out of the field ASAP to reduce the likelihood of sprout damage from August rains.
This year may be one of the most profitable years for grain production so PAY ATTENTION to the details.
Wishing everyone the best for the upcoming season!
Cheers,
Juliet
Plant Sciences Department Head, Endowed Research Professor, Cereals Pathology and Agronomy
Idaho Falls R&E Center
1776 Science Center Drive Suite 205
Idaho Falls, ID 83402
208-529-8376 office
http://www.uidaho.edu/extension/cereals/scseidaho/
“We shouldn’t be looking for certainty. Instead, we should be saying to ourselves ‘When do we have enough evidence to make good decisions.’” Cailin O’Connor UC Irvine
Growing Degree Days for Potatoes
Potato All Locations
Posted on: April 28, 2022 by Nora Olsen and Mike Thornton
<p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%">Snow, hail,
rain, sunshine, and wind appear to be interchangeable this April. To focus on
the temperatures so far, calculating growing degree days (GDD) or heat units is
one method to look at the effect of temperature on the potato crop. Plant
growth and development is greatly influenced by temperature, and we use GDD to
get an idea of how the plant is developing throughout the season. It also gives
a great snapshot on how the current season compares to previous seasons. Daily
GDD is calculated by adding the maximum temperature and the minimum
temperature, dividing by 2 and subtracting a base temperature. The base
temperature is used to define the temperature at which potato growth is
diminished. <o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%">To quantify this
period of cold temperatures, we collated the cumulative GDDs for Parma,
Kimberly and Aberdeen. The source of the GDD was AgriMet (www.usbr.gov/pn/agrimet/wxdata.html)
weather stations located at the three sites. The AgriMet calculation of GDD
uses 50F as a minimum and 86F as a maximum. There are limitations to the use of
these minimum and maximums since potatoes will grow outside of this range, but
these calculations can still provide a reasonable prediction of the temperatures
impacting potato growth. The GDD these past weeks is quite a contrast to the
GDD from 2021 and the 11-year average.<o:p></o:p></span></p><p>
</p><p class="MsoNormal"><span style="font-size:12.0pt;line-height:107%">To help
provide a picture of the relationship between temperature and plant
development, we will continue to update the GDD graphs weekly for the three
locations and post at </span><a href="http://www.uidaho.edu/cals/potatoes/storage"><span style="font-size:12.0pt;
line-height:107%">www.uidaho.edu/cals/potatoes/storage</span></a><span style="font-size:12.0pt;line-height:107%">. Aberdeen GDD was not available at
this time but will be posted on the website when available.<o:p></o:p></span></p>
