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2021 Apple Codling Moth, Second Generation
General Landscape and Garden Treasure Valley
Codling Moth Cydia pomonella
Posted on: July 2, 2021 by Nic Usabel
The second generation of codling moth will begin egg hatch this weekend. Current trap biofix degree day models indicate 1069 DD as of July 1. Beginning egg hatch begins at 1120 DD, currently forecasted to be met by July 3.
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.
Reference Materials:
- PNW Management Handbook: Codling Moth
- Codling Moth, Utah State University
- Codling Moth, Colorado State University
INSECT PHOTOS NEEDED
All Crops All Locations
Posted on: July 2, 2021 by Jerry Neufeld
As a
component of a USDA-funded project, Harnessing
artificial intelligence for implementing integrated pest management in
small-grain production systems, the University of Idaho is
developing a system to automatically
identify insects in wheat and other crops based on submitted cellphone images.
To develop this system, we
need your help with collecting a large number of
photographs of pests and beneficial insects observed in cereal cropping systems
(cereals and rotation crops) throughout the region. We will use these photos
(hopefully thousands) to train our computer algorithm to enable the system to
generate the most accurate identifications of unknown samples.
To help
us develop this tool, please upload insect photographs through this link: https://cerealpestaid.net/
2021 Squash Bug
General Landscape and Garden Treasure Valley
Squash Bug (Anasa tristis)
Posted on: June 30, 2021 by Nic Usabel
Squash bugs have been reported in Canyon County by an Idaho Master Gardener. 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.
Reference Materials:
- PNW Management Handbook: Squash Bug
2021 Peachtree Borer
General Landscape and Garden Treasure Valley
Peachtree Borer (Synanthedon exitiosa)
Posted on: June 23, 2021 by Nic Usabel
The peachtree borer Degree Day (DD) model indicates that now is the time to begin management. This pest is a concern for stone fruits: Peach, nectarine, apricot, cherry, and plum. Key symptoms of peachtree borer infestation include 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 (or based on DD) 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 options review the PNW handbook.
Chemical Control, Commercial:
Reference the PNW handbook to review application recommendations.
Cultural Management 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.
Reference Materials:
- PNW Management Handbook: Peach and Nectarine - Peachtree Borer (previously linked above)
- Greater Peachtree Borer, Utah State University
- Peachtree Borer, Colorado State
» https://pnwhandbooks.org/insect/tree-fruit/peach-nectarine/peach-nectarine-peachtree-borer
» https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1651&context=extension_curall
» https://extension.colostate.edu/topic-areas/insects/peach-tree-borer-5-566/
2021 Turfgrass Mowing Height & Watering
General Landscape and Garden Treasure Valley
Posted on: June 22, 2021 by Nic Usabel
The weather in the Treasure Valley is warming quickly!
MOWING
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 10 inches to 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 this fall adjust the frequency of irrigation to maintain plant available water in the root zone. Frequency of irrigation refers to the number of days between each water application.
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 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.
- Watering Home Lawns: How Much and How Often
- Watering Home Lawns & Landscapes
- Idaho Landscapes & Garden Website: Lawn & Turf
» https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1157.pdf
» https://www.extension.uidaho.edu/publishing/pdf/CIS/CIS1098.pdf
CANCELLED! The July 8th Snake River Weed Control Tour
All Crops All Locations
Posted on: June 22, 2021 by Pamela Hutchinson
The 2021 Snake River Weed Control Tour July 8th at the University of Idaho Aberdeen R&E Center has been cancelled. We hope to see you next year!
July 8th UI Snake River Weed Mgt Tour - Aberdeen R&E Center
All Crops All Locations
Posted on: June 15, 2021 by Pamela Hutchinson
2021 UI Snake River Weed Management Tour – Potatoes and Specialty Crops
Aberdeen R&E Center, Thursday July 8th
Registration begins at 8:30 am
Tour 9a to 12:30p
• Herbicide Tank Mixes for Weed Control in Potatoes.
• Chateau – Fierce – Mauler.
• Anthem Flex Tank Mixtures,
• Sonalan Tank Mixtures for Weed Control in Potatoes.
• Potato Variety Tolerance to Sulfentrazone.
• Potato Variety Tolerance Trials.
• Excess Rainfall Effect on Herbicides and Potato injury.
• Quinoa herbicide screening.
• Litchi tomato herbicide management.
• Herbicide Mechanism of Action Demonstration Plots.
Pest Management Updates and Information:
• Albert Adjesiwor, Weed Scientist, Kimberly R&E Center
Three Idaho Pesticide Applicator Credits will be offered.
For more information contact Pamela J.S. Hutchinson phutch@uidaho.edu 208-681-1304
UI Ag Talk Tuesday June 15, 11AM
All Crops All Locations
General announcment
Posted on: June 15, 2021 by Kasia Duellman
The next Ag Talk Tuesday session is tomorrow, June 15 at 11 AM (MDT).
Registration is required. Register by clicking this link: https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
Or, visit our website for more information: https://www.uidaho.edu/extension/news/ag-talk-tuesday
The live session will begin with a roundtable crop update - listen, contribute, discuss current season crop issues. Crop updates are followed by featured presentations by guest speakers.
June 15 featured presentations:
— PVP and Title V and the implications and impacts for producers — Jeremy Tamsen, Director, Office of Technology Transfer
- If you have questions related to what PVP and Title V mean to saving and selling seed, then please join us for Jeremy Tamsen’s presentation and discussion!
— Post-emergence herbicides for broadleaf and grass control in potatoes — Pam Hutchinson, UI Associate Professor & Extension Specialist (Potato Cropping Systems Weed Scientist)
» https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
Rare Mint Pest Found in Midwest Mint Field
Mint Treasure Valley - Idaho
Endothenia nubilana
Posted on: June 7, 2021 by Jerry Neufeld
Steve Salisbury, from the Mint Industry Research Council,
is reporting that a new rare pest has been found in a Midwest mint field. The pest is Endothenia nubilana, a Lepitoptera
insect in the Tortricidae family. Click on the pdf below for more
information.
» https://mailchi.mp/ostlund/tough-herbicide-pyridate-announcement-5212005?e=203be8b62d
2021 Peach Twig Borer
General Landscape and Garden Treasure Valley
Peach Twig Borer (Anarsia lineatella)
Posted on: June 4, 2021 by Nic Usabel
Management of the peach twig borer, based on degree days and trap catches, will take place June 6 – June 10. This pest is a concern for those growing peach, nectarine, apricot, plum and prune.
ABOUT
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.
CONTROL
For chemical control management options review the PNW Handbook, link #1 below, to select a control option appropriate for operation. Apply according to label directions.
For cultural controls prune out shoot strikes (dead shoots) 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
2021 Fruit Thinning
General Landscape and Garden Treasure Valley
Posted on: June 2, 2021 by Nic Usabel
Fruits which are crowded should be thinned. Apples, pears,
Asian pears, apricots, plums, and peaches all respond positively to thinning.
Cherries and nut trees are usually not thinned. Thinning fruit will 1) increase
fruit size, 2) improve the trees productivity in the year to come, and 3)
reduce limb breakage as fruits begin to size. Too many fruits on a tree
translates into small fruit that is often of poor quality.
General rules for thinning: 1) The earlier the better, 2)
remove smaller fruits and leave the larger ones, 3) remove fruits with disease
spots, hail damage, or other defects, 4) aim for even spacing.
General guidelines by fruit – see links below for additional
detail.
- Apples & pears: Almost always need thinning. Should be thinned
to one fruit per spur with a good spacing of one fruit per 6” of branch. Asian pears spaced at one fruit per 6-8” of branch. Be careful not to break off spurs while
thinning – spurs produce flowers and fruit for many years if not broken.
Recommend to thin apples within 40 days of full bloom and pears within 60 days
of full bloom. - Peaches & nectarines: Should be
spaced at one fruit per 6-8” of branch. Fruits that are joined should be
removed. Recommend to thin peaches about 70 days past full bloom. - Plums: Should be thinned to have
spacing at 6” between fruit along the branch. - Apricots: If tree experiences heavy
fruit set thin fruit spaced to 3” along branch.
“June Drop” which is when the tree will naturally drop fruit. Some prefer to
wait until this event happens to thin, however there are great advantages to
thinning early. More details can be found in the links below.
» https://extension.wsu.edu/maritimefruit/fruit-thinning-for-high-quality/
UI Ag Talk Tuesday June 1 at 11:00 AM
All Crops All Locations
Posted on: May 31, 2021 by Kasia Duellman
Please Join us for the next Ag Talk Tuesday, June 1 at 11 AM.
These online, live sessions are held every first and third Tuesday of May, June, July and August and they begin with a round table of crop updates followed by Guest Speakers presenting Featured Topics. This week's session's Featured Topics are:
Farm stress management — Lance Ellis, Lance Hansen
Post-emergence herbicides for broadleaf and grass control in potatoes — Pam Hutchinson
If you haven't already registered,
Register here: https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
More information is available online at https://www.uidaho.edu/extension/news/ag-talk-tuesday
We hope to see you there!
Sincerely,
Your Ag Talk Tuesday Organizers:
Kasia Duellman (kduellman@uidaho.edu)
Pamela J.S. Hutchinson (phutch@uidaho.edu)
Juliet Marshall (jmarshall@uidaho.edu)
2021 Western Cherry Fruit Fly
General Landscape and Garden Treasure Valley
Western Cherry Fruit Fly (Rhagoletis indifferens)
Posted on: May 28, 2021 by Nic Usabel
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.
Management begins once the cherries start to blush (ripen to a salmon blush
color) when the fruits are susceptible to egg-laying by the adult females. Consider
the maturity of the ripest fruit on the tree/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.
Current models indicate the degree days, as of May 27, between
1066 DD and 1111 DD depending on location.
» https://pnwhandbooks.org/insect/tree-fruit/cherry/cherry-western-cherry-fruit-fly
» https://climate.usu.edu//includes/pestFactSheets/WC-Fruit-Fly.pdf
» http://treefruit.wsu.edu/crop-protection/opm/western-cherry-fruit-fly/
2021 Aphid Monitoring
General Landscape and Garden Treasure Valley
Aphid (Family Aphididae)
Posted on: May 27, 2021 by Nic Usabel
Many different aphid species feed on ornamental landscape
plants. Aphids feed by inserting thin mouthparts into the plant phloem and
sucking out sap. Aphids are globular and 1 to 6 mm long depending on life stage
and species. They can be black, brown, yellow, red, gray or green. The legs and
antennae are usually long and fragile. Aphids may be wingless or have
functional wings. The offspring are smaller than the adults and are always
wingless.
Aphids excrete a sweet, sticky liquid called honeydew. When
aphids are abundant, honeydew often completely coats leaves and other objects below, giving infested plants a sticky or varnished appearance.
SCOUTING & MONITORING
- Scout plants at least twice weekly when plants are young and
growing rapidly. - Check the underside of leaves where aphids congregate.
CONTROL – CULTURAL & MECHANICAL
- On Shrubs and garden plants aphids can sometimes be managed
by simply washing aphids off plants with a forceful jet of water. - If natural enemies are present such as lady beetle larvae or
lacewing larvae these voracious predators will help to manage the control of
aphids without chemical application. - Several species of minute stingless wasps
will also parasitize aphids. - Encourage natural enemies by planting yarrow, alyssum, herbs
and other plants with small attractive flowers. - Manage nitrogen levels.
- Use row covers
CONTROL – CHEMICAL
Thresholds help to determine whether and when to treat for
aphids.
- When plants are young, aphid populations are increasing and
aphids occur on 50-60% of the leaves. - Aphid populations remain at 8 to 10 or more per leaf for two
or more consecutive weeks.
If high numbers of aphids regularly occur and
injure plant or are not sufficiently controlled by beneficial insects an
insecticide could be used for control. See publication links for suggested
control.
UPCOMING PROGRAMMING
For upcoming programming activities view that attached documents
- U and I Together: An activity series where all ages can learn!
- Creating a Fire-Resistant Landscape
» https://pnwhandbooks.org/insect/hort/landscape/common/landscape-aphid
» https://extension.usu.edu/pests/research/aphid-pests-on-vegetables
» https://extension.colostate.edu/topic-areas/insects/aphids-on-shade-trees-and-ornamentals-5-511/
EPA has extended the delay for respirator fit testing until September 30, 2021.
All Crops All Locations
Posted on: May 21, 2021 by Jerry Neufeld
Due to
the COVID19 pandemic, and concerns about obtaining respirators and annual fit
testing as required by the WPS, EPA has provided guidance for delaying the
annual fit testing. This delay will be effective until September 30,
2021. EPA expects employers and handlers to make every effort to
comply with all pesticide label and Agricultural WPS requirements.
If all
options to find new respirators and get handlers fit tested, are exhausted,
EPA's guidance provides the following additional options:
- Reuse and extend use of disposable N95 filter facepiece
respirators, - Use of "expired" respirators,
- Use of respirators certified in certain other countries
or jurisdictions meeting protective conditions outlined, - Delay the annual respirator "fit
test".
Potential
risk to handlers can be minimized if the handlers and the employers comply with
all other requirements of the WPS and pesticide labels if:
- Handlers have received an annual fit test during
calendar year 2019 or 2020 and continue to use that specific respirator
make and model, - Handlers have not had a physiological change that
affects the seal (e.g. 20lb. weight loss or gain, facial surgery, scarring
since last fit test), - Handler employer can demonstrate that the handler
received respirator training in the previous 12 months.
THIS
AMENDMENT TO THE WPS EXPIRES SEPTEMBER 30, 2021.
Click
on the line below for more information from the EPA.
2021 Leafminer in Leafy Greens
General Landscape and Garden Treasure Valley
Leafminer (Liriomyza spp.)
Posted on: May 21, 2021 by Nic Usabel
Canyon County Idaho Master Gardeners have spotted leafminer damage on a recent Integrated Pest Management walk.
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.
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/spinach-leafminer
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/beet-table-leafminer
» https://pnwhandbooks.org/insect/vegetable/vegetable-pests/hosts-pests/chard-swiss-leafminer
Sugarbeet Root Maggot - 2021
Sugarbeets All Locations
sugarbeet root maggot
Posted on: May 19, 2021 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— the peak flight of root maggot flies began a few days
ago. 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
Amalgamated Sugar Company field consultants are reporting that root maggot fly pressure
appears to be light at the moment in the Treasure Valley, but there are some
elevated levels of root maggot flies in eastern Idaho . If you suspect you are having issues with these
pests contact your TASCO field consultant.
Click on the links below for control information from the PNW Insect
Control Handbook and the TASCO “Fly Monitoring Readings”.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
Ag Talk Tuesday - May 18 at 11 AM
All Crops All Locations
Ag Talk Tuesday
Posted on: May 14, 2021 by Juliet Marshall
May 18 — Idaho Insect Identification website overview — Brad Stokes, Jason Thomas & Aquifer recharge program — Keith Esplin — Juliet Marshall (host)
| 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 |
2021 Billbug Grub Control
General Landscape and Garden Treasure Valley
Billbug Grub
Posted on: May 12, 2021 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 26. 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/
2021 Apple Codling Moth, First Generation
General Landscape and Garden Treasure Valley
Codling Moth Cydia pomonella
Posted on: May 12, 2021 by Nic Usabel
The first apple codling moths were trapped at the end of April (Biofix on April 26). Currently the degree day model is reporting 138 degree days (DD) as of May 11. There are different management options to consider when controlling this pest.
Option A: Starting at 200 DD, forecasted to be May 15, 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 17, 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).
Cultural control options include bagging the fruit once the fruit is ½ to ¾ inches in diameter. An insecticide application may be required before bags are applied to prevent early infestation. For a home /small orchard remove and dispose of young, damaged fruit by checking regularly. Placement of corrugated bands of carboard around the lower trunk can attract larvae looking for a place to pupate. Place bands in May and remove before adults begin to emerge in June.
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/
Ag Talk Tuesday Resume TOMORROW May 4
All Crops All Locations
Posted on: May 3, 2021 by Kasia Duellman
Ag Talk Tuesday resumes tomorrow May 4, 11AM to 1PM (MDT).
All sessions will be held on the first and third Tuesdays, May through August.
Registration is required. Register here: https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
For more information and a schedule of topics, please visit our website: https://www.uidaho.edu/extension/news/ag-talk-tuesday
» https://www.uidaho.edu/extension/news/ag-talk-tuesday
» https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
2021 Lilac-Ash Borer
General Landscape and Garden Treasure Valley
Lilac-Ash Borer Podosesia syringae
Posted on: April 30, 2021 by Nic Usabel
The lilac-ash borer (Podosesia syringae), a clear-wing moth, can be a destructive pest for 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 10, 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://pnwhandbooks.org/insect/hort/landscape/hosts-pests-landscape-plants/ash-fraxinus-ash-borer
» https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1920&context=extension_curall
» https://pnwhandbooks.org/insect/hort/landscape/hosts-pests-landscape-plants/lilac-syringa-ash-borer
» https://extension.colostate.edu/docs/pubs/insect/05614.pdf
ISDA Pesticide Disposal Program for Spring 2021
All Crops Treasure Valley - Idaho
Posted on: April 27, 2021 by Jerry Neufeld
Idaho State Department of Agriculture will be hosting a pesticide disposal program at various locations in May. Click on the pdf below for more information.
Ag Talk Tuesday resumes!
All Crops All Locations
Ag Talk Tuesday
Posted on: April 23, 2021 by Juliet Marshall
Greetings!
We are excited to announce that the University of Idaho Extension's Ag Talk Tuesday sessions will resume May 4 for the 2021 season.
As usual, these sessions will be held on the first and third Tuesdays of May, June, July and August, from 11AM to 1PM (MDT).
You can find a schedule (subject to change) and more information on our website: https://www.uidaho.edu/extension/news/ag-talk-tuesday
Registration is required to attend. You only need to register once to attend all sessions. Once you register, information on how to attend via Zoom or by calling in by phone will be sent to you in a separate email.
To register, click this link (or copy and paste it into your web browser): https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz.
Please join us starting May 4 at 11 AM (MDT) for these online, live, interactive sessions that focus on agriculture - current season issues related to pests, diseases, weeds, diagnostics, soil health, irrigation, agronomy & more along with featured topics and guest speakers.
For questions, please contact one of the organizers: Kasia Duellman (kduellman@uidaho.edu), Pam Hutchinson (phutch@uidaho.edu), or Juliet Marshall (jmarshall@uidaho.edu).
| 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 |
» https://uidaho.zoom.us/meeting/register/tZ0pd-ugrzktHdEEbqB3aHk3rlJLgCeSkCLz
2021 Idaho Master Gardener Plant Diagnostic Clinics & Plant Sales
General Landscape and Garden Treasure Valley
Posted on: April 17, 2021 by Nic Usabel
Plant Diagnostic Clinic:
Many University of Idaho Extension offices offer a free plant
diagnostic clinic where certified Idaho Master Gardener volunteers help answer
clientele questions. Here are the details that were shared with the PNW Pest Alert
Network.
- UI Extension, Ada County (Boise, ID): The plant diagnostic clinic
operates April through September. Ada county residents should contact 208-287-5900
or email adamg@uidaho.edu with landscape
and garden questions. For additional details visit https://www.uidaho.edu/extension/county/ada/horticulture. - UI Extension, Canyon County (Caldwell, ID): The free plant diagnostic
clinic operates May through September and is staffed Monday and Wednesday 1 PM
to 4 PM and Friday 9 AM to 12 PM. Canyon county residents should contact 208-459-6003
or email ccmg@uidaho.edu with landscape
and garden questions. For additional details visit https://www.uidaho.edu/extension/county/canyon/horticulture.
Don’t see your county listed? Use the first link below to
find all county locations in Idaho.
Spring Garden Plant Sale:
- UI Extension, Ada County (Boise, ID): Let’s get growing! The
University of Idaho Annual Master Gardener Plant Sale will be held Saturday,
May 1st from 9:00 a.m. to 12:00 p.m., at the Ada County Extension Office, 5880
Glenwood Street, Boise. Offerings include houseplants, herbs, vegetables, and
berries, flowering perennials, gardening books, and so much more. Cash or check
only. Please no early birds. For more information, call the Master Gardeners at
(208) 287-5900. Come join the fun! - UI Extension, Canyon County (Caldwell, ID): Searching for
new plants to add to your garden or landscape? The University of Idaho Canyon
County Master Gardener Spring Garden Plant Sale will be held on Saturday, April
24th from 9:00 AM to 1:00 PM, at Canyon County Extension Office, 501 Main
Street, Caldwell. New this year will be the virtual pre-sale opening Monday,
April 19 and closing Friday, April 23. Items can be pre-ordered at https://bit.ly/ccmgstore and are available
for pick up Saturday, April 24 from 9:30 AM to 11:30 AM. Available plants
include vegetables, herbs, houseplants, succulents, flowering perennials,
native plants, and so much more. Join in the fun! For More information, call UI
Extension, Canyon County at (208) 459-6003.
» https://www.extension.uidaho.edu/find.aspx
» https://www.uidaho.edu/extension/county/ada/horticulture
» https://www.uidaho.edu/extension/county/canyon/horticulture.
