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July 21, 2022 psyllid update
All Crops All Locations
Posted on: July 22, 2022 by Erik Wenninger
This week we had traps deployed in 64 of the 72 fields that we are monitoring this year, though traps from two fields were not submitted. We found a total of 12 psyllids across 10 (16%) of the 62 fields observed.
Psyllids were captured in the following counties: Canyon (2 fields), Jerome (1 field), Twin Falls (2 fields), Cassia (2 fields), Minidoka (2 fields), and Power (1 field).
Three of the four psyllids collected last week tested positive for Lso, the bacterium associated with zebra chip disease (ZC). Positive psyllids were collected from both of the fields in which we found psyllids last week (in Canyon and Bingham counties).
Psyllid numbers this week ticked up a bit from last week’s very low count, but overall captures remain far behind the 100+ psyllids that we were capturing each week by this time last year.
Despite the low psyllid captures, given the incidence of Lso observed over the last two weeks, we urge growers to watch psyllid captures closely and to have their IPM programs in place.
In other news, we have a new site in development that allows you to explore our psyllid captures by county and region in Idaho over time and to compare this year’s captures with those from recent years. It’s still in the testing phase, but we expect to be able to share at least part of that functionality next week.
More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the link under “Updated weekly reports” for details on trap captures.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
A BIG Week for Cereals Field days! Let's GO, Idaho!
Small Grains Eastern Idaho
Cereals
Posted on: July 18, 2022 by Juliet Marshall
Tuesday - ABERDEEN R&E Center. 8 AM registration UI and LCS joint field day - lunch provided Wednesday - IDAHO FALLS. 4:00 PM start - Dinner provided (Sealander Park) Thursday - SODA SPRINGS. 4 PM start - Dinner provided at Hooper Springs |
See the Attached PDF file for locations and directions
» UI_Extension_2022_Cereals_Field_Days_For_Southern_Eastern_ID.pdf
Ag Talk Tuesday - Cancelled for Tuesday July 19th
Small Grains Eastern Idaho
Wheat, barley, etc
Posted on: July 18, 2022 by Juliet Marshall
Ag Talk Tuesday Registrants,
Thank you for registering for the University of Idaho Ag Talk Tuesday sessions.
Please note that the July 19th session is cancelled. All organizers will be at different meetings and unavailable.
Ag Talk Tuesday sessions will return for August 2 and August 16. You can view the scheduled topics here: https://www.uidaho.edu/extension/news/ag-talk-tuesday
Sincerely,
Your Ag Talk Tuesday Oganizers:
Kasia Duellman
Pam Hutchinson
Doug Finkelnburg
Juliet Marshall
Olga Walsh
--------------------------------------
| KASIA M. DUELLMAN, Ph.D. Assistant Professor of Plant Pathology and Extension Specialist |
Black Bean Aphids in Sugarbeets near Twin Falls
All Crops All Locations
Posted on: July 18, 2022 by Jerry Neufeld
The Amalgamated Sugar Company field consultants are reporting that Black Bean Aphids have been found in sugarbeet fields near Twin Falls, Idaho. Amalgamated Sugar asks that you contact your crop consultant if you have any application questions. Click on the link below for more information about Black Bean Aphid in the Pacific Northwest Insect Management Handbook.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-aphid
2022 Apple Codling Moth, Second Generation
General Landscape and Garden Treasure Valley, Treasure Valley - Idaho, Northern Idaho
Posted on: July 15, 2022 by Ruth Givens
The second generation of codling moth will begin egg hatch this week. Current degree day models indicate 1078 DD as of July 15. Beginning egg hatch begins at 1100 DD, currently forecasted for July 16.
Rotate among insecticide classes between generations to prevent development of insecticide resistance. 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/
First Lso-positive psyllids of the 2022 season
Potato All Locations
potato psyllid
Posted on: July 15, 2022 by Erik Wenninger
This week we had traps deployed in 64 of the 72 fields that we are monitoring this year. We found a total of only 4 psyllids across 2 (3%) of the 64 fields.
Psyllids were captured in the following counties: Canyon (1 field) and Bingham (1 field).
5 of the 12 psyllids collected last week tested positive for Lso, the bacterium associated with zebra chip disease (ZC). Positive psyllids were collected from fields in Canyon, Owyhee, Twin Falls, and Cassia counties.
So far this has been a quiet season for psyllid captures in Idaho; by this time last year we were trapping well over 100 psyllids per week. However, the incidence of Lso observed last week is somewhat concerning. Risk of ZC is a function of both psyllid numbers and Lso incidence, so it is fortunate that psyllid numbers have been low thus far. In all of the fields in which a positive psyllid was found last week, no psyllids at all were found this week.
To view contour maps that illustrate relative psyllid abundance across the landscape, you can set up a free account here: https://potatoes.decisionaid.systems/ Updated maps will be generated every Friday morning.
More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the link under “Updated weekly reports” for details on trap captures.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.
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
