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A few more psyllids found in Treasure and Magic Valleys

Potato    All Locations

Potato Psyllid

Posted on: June 22, 2018 by Lucy Standley

Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (3 fields), Jerome (1 field), and Twin Falls (1 field).

This week, we collected 10 psyllid from sticky cards (3 light sites and 2 intense sites).

We had traps deployed in 85 of the estimated 97 fields (87%) that will be monitored this year and found psyllids in 5 of the monitored fields (5.8%). However, we are still waiting to receive cards from 19 sites.

All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.

More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the links under “Updated weekly reports” for details on trap captures in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.

Spider Mite Warning

Landscape and Garden    All Locations

Spider Mite

Posted on: June 22, 2018 by Dian Roberson

As temperatures rise in June be on the lookout for spider mites. They can attack a wide variety of crops and ornamentals. Look for bronzing of leaves or mite webbing. Dry, hot conditions favor all spider mites, this is why they are so important in more arid regions like the Treasure Valley. They feed more under dry conditions, as the lower humidity allows them to evaporate excess water they excrete. At the same time, most of their natural enemies require more humid conditions and are stressed by arid conditions. Plants stressed by drought can make them more nutritious to spider mites so check your irrigation systems to make sure they are functioning properly.

UI SNAKE RIVER PEST MANAGEMENT TOURS

All Crops    All Locations

Posted on: June 19, 2018 by Jerry Neufeld

The following information is provided by Dr. Pamela Hutchinson, University of Idaho Extension Specialist.

Please mark your calendars and plan to attend the UI Snake River Pest Management Tours. The first one is at Aberdeen on June 26th and the second one is at Kimberly on June 27th. Both field days start at 8:30 am with registration beginning at 8:00.

Aberdeen will feature several weed control trials in potatoes, including targeted herbicide programs in potatoes, Sonalan tank mixtures, and sulfentrazone formulation comparisons. Also, featured are herbicide mechanism of action plots, quinoa herbicide screening and Litchi tomato herbicide management.

At Kimberly, we will look at broadleaf and wild oat control in spring wheat, clover cover crop in wheat, safflower tolerance to sulfentrazone, weed control comparison between direct seeded and conventional tillage sugar beet, potato psyllid, Colorado potato beetle, aphid and wireworm management in potato, an update on the spore trapping network for early plant disease detection in potato, dry bean, sugar beet, and small grains, response of sugar beet to herbicide safener, beet leafminer control in sugar beet, weed control in dry bean, weed control in corn, and herbicide mechanism of action plots.

Both field days conclude with a sponsored lunch and pesticide recertification credits.

We hope to see you there!
Pam and Don


Don W. Morishita, Ph.D.
Superintendent, Professor of Weed Science and Extension Specialist University of Idaho | Kimberly R&E Center | 3806 N. 3600 E. | Kimberly, ID
83341 USA
Email: don@uidaho.edu | Phone: 208.423.6616 | Fax: 208.423.6631

Pamela J.S. Hutchinson
Potato Cropping Systems Weed Scientist
Aberdeen R&E Center
1693 S 2700 W
Aberdeen, ID 83210
Cell ph 208-681-1304
Office ph 397-4181 fax 397-4311
phutch@uidaho.edu

POTATO ASSOCIATION OF AMERICA MEETING
102nd Annual Meeting
July 22-26, 2018
Boise, ID
visit www.uidaho.edu/PAA2018

Ag Talk Tuesday

All Crops    All Locations

Posted on: June 18, 2018 by Jerry Neufeld

The following information was provided by Dr. Pamela Hutchinson, Ag Extension Specialist with the University of Idaho.

WHAT: AG TALK TUESDAY
WHEN: JUNE 19,2018
11:30a to 1p
WHERE: THE BAY CAFE, AMERICAN FALLS
2830 Marina Rd
American Falls, ID 83211
(208) 226-2688

Potato, weed, and cereal pathology specialists have initiated "Ag Talk Tuesday" with multiple ATT sessions throughout the growing season in order to interact with University of Idaho specialists and get answers as well as discuss current crop status. We learn from you, too!

Please come to our third UofI Extension Ag Talk Tuesday, on June 19, from
11:30 AM to 1:00 PM.

This event is a non-host lunch where you can join UofI Ag Extension Specialists to talk about current ag production issues. We'd love to hear about what you are seeing in your fields. To help foster conversation, Drs Pamela J.S. Hutchinson, Kasia Duellman will give an update on potato diseases, insects, and weeds. Other specialists and county extension educators may also be present to help field any questions you may have or to hear about your own wisdom and experiences on what works and doesn't work on your farm.

Please join us Tuesday June 19th.

Contact Pamela J.S. Hutchinson for more information.
phutch@uidsho.edu

Future ATTs
June 26 - no ATT (Hutchinson Snake River Research Pest Management Tour - Aberdeen R and E Center 8a registration 8:30-noon tour followed by sponsored lunch.

July 3 - no ATT

July 10 - Burley (venue to be determined)

July 17 - Idaho Falls

First potato psyllid found in Magic Valley

Potato    All Locations

Potato Psyllid

Posted on: June 15, 2018 by Lucy Standley

Psyllids were collected this week on sticky traps in potato in the following counties: Canyon (3 fields), Owyhee (1 field), and Twin Falls (1 field).

This week, we collected 6 psyllid from sticky cards (5 light sites).

We had traps deployed in 75 of the estimated 85 fields (88%) that will be monitored this year and found psyllids in 5 of the monitored fields (5.8%).

The psyllid collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.

More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the links under “Updated weekly reports” for details on trap captures in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.

Another psyllid found in Treasure Valley; none in Magic Valley

Potato    All Locations

Potato Psyllid

Posted on: June 8, 2018 by Lucy Standley

One potato psyllid was collected on a sticky trap in potato in the following county: Canyon (1 field).

This week, we collected one psyllid from sticky cards (1 light site).

We had traps deployed in 50 of the estimated 89 fields (56%) that will be monitored this year and found one psyllid in one of the monitored fields (2%).

The psyllid collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip.

More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the links under “Updated weekly reports” for details on trap captures in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.

First potato psyllid found in Idaho potato fields this season

Potato    All Locations

Potato Psyllid

Posted on: June 1, 2018 by Lucy Standley

One potato psyllid was collected on a sticky trap in potato in the following county: Canyon (1 field).

This week, we collected one psyllid from sticky cards (1 light site).

We had traps deployed in 50 of the estimated 88 fields (57%) that will be monitored this year and found one psyllid in one of the monitored fields (1.13%).

More information can be found here: http://www.uidaho.edu/cals/potatoes/news
--Click on the links under “Updated weekly reports” for details on trap captures in Intense and Light sites.
--Click on the “Psyllid Management” link on the left panel for information on psyllid and zebra chip biology and management.

Scale on Honeylocust (Nampa)

Landscape and Garden    All Locations

Pulvinaria innumerabilis

Posted on: May 30, 2018 by Rich Guggenheim

Cottony maple scale occasionally builds up in large numbers on branches and leaves of honeylocust, becoming quite conspicuous as egg sacs swell in June and July. The overwintering stage of this scale (mated female) can be controlled with dormant oil applications made before new growth in spring. These treatments also can help suppress spider mites, eriophyid mites and plant bugs that overwinter on trees.

Newly hatched crawlers generally appear in late June through July and can be controlled at that time with Sevin, Orthene or various pyrethroids. Imidacloprid (Merit) applied as a soil systemic treatment should also be effective, provided sites are irrigated. Natural controls generally maintain cottony maple scale at nondamaging levels and sustained infestations lasting more than one season are very rare.

2018 Potato psyllid monitoring program underway in Idaho

Potato    All Locations

Potato Psyllid

Posted on: May 25, 2018 by Lucy Standley

The University of Idaho, in collaboration with Miller Research and several crop consultants across the state will continue our monitoring program for potato psyllids, zebra chip, and liberibacter (Lso), the bacterium that causes zebra chip. The monitoring program covers commercial potato fields throughout southern Idaho and currently is funded in part by USDA and generous in-kind contributions by our collaborators.

The first deployment of sticky cards occurred last week in 17 Treasure Valley sites and 21 Magic Valley sites. Next week we expect to initiate sampling in 8 and 17 additional fields in the Treasure and Magic valleys, respectively.

This week we collected our first sticky cards of the season from potato fields. No potato psyllids were found in potato fields this week.

More details on the program will be forthcoming as we continue to ramp up sampling efforts. We hope to maintain a monitoring program at a level similar to recent years, but the breadth of the program this year will depend on funding that is still pending.

More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.

http://www.uidaho.edu/cals/potatoes/news/psyllid-management

Western Cherry Fruit Fly 2018

Cherry    Treasure Valley

Western Cherry Fruit Fly

Posted on: May 25, 2018 by Paul Castrovillo

On May 22 the first 2018 Western Cherry Fruit Fly captured in an Idaho State Department of Agriculture WCFF trap was reported from Canyon County. Historically we expect to find WCFF in Gem County about a week after the first one is found in Canyon County.

Online phenology and degree-day models for WCFF predict first flight on May 21 in Ontario and Parma, May 24 in Caldwell, May 25 in Emmett, May 29 in Boise and May 31 in Nampa.

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

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

Ag Talk Tuesdays

All Crops    All Locations

Cereals, Potatoes, Weeds - in the future, additional crops will be included coincident with location of ATT

Posted on: May 23, 2018 by Juliet Marshall

Potato, weed, and cereal pathology specialists are initiating "Ag Talk Tuesday" with multiple ATT sessions throughout the growing season in order to interact with University of Idaho specialists and get answers as well as discuss current crop status.

Details:

WHAT: Ag Talk Tuesday - no host lunch
WHEN: June 5 at 11:30 AM - 1:00 PM
WHERE: first one at Homestead Family Restaurant in Blackfoot, ID


We'd like to invite you to our first ever UofI Extension Ag Talk Tuesday, on June 5, from 11:30 AM to 1:00 PM.
The plan is to have multiple ATT sessions throughout the growing season in order to interact with University of Idaho specialists and get answers as well as discuss current crop status.

What: The FIRST EVER UofI Extension "Ag Talk Tuesday"
When: June 5, 11:30AM to 1:00PM
Where: Homestead Family Restaurant, 1355 Parkway Dr, Blackfoot, ID 83221 https://goo.gl/maps/GqfR7oghVNt

This event is a non-host lunch where you can join UofI Ag Extension Specialists to talk about current ag production issues. We'd love to hear about what you are seeing in your fields. To help foster conversation, Dr. Juliet Marshall will present some information on Fusarium head blight on small grains and the 2018 outlook; Dr. Pam Hutchinson will provide some tips on post-emergence herbicides; and Dr. Kasia Duellman will give an update on early season potato diseases. Juliet and Kasia will also mention the UofI Spore Trapping Network that will be fully operational by then. Other specialists and county extension educators may also be present to help field any questions you may have or to hear about your own wisdom and experiences on what works and doesn't work on your farm.

Please join us, and if you plan to attend, please RSVP to me by replying to this email or calling and leaving a message at 208-529-8376.

Future locations for Ag Talk Tuesday will be determined, to accommodate growers in different regions (we’re open to suggestions for venues and would like to rotate around eastern Idaho).

Sincerely,
Juliet


Juliet Marshall, Ph.D.
Endowed Research Professor, Cereals Pathology and Agronomy
Department of Entomology, Plant Pathology and Nematology

Idaho Falls R&E Center
1776 Science Drive Suite 205
Idaho Falls, ID 83402
208-529-8376 office
208-390-4859 cell

http://www.uidaho.edu/extension/cereals/scseidaho

Coddling Moth 2018

Apple    Treasure Valley

Posted on: May 21, 2018 by Dian Roberson

Coddling Moth has been detected in traps so it is time to take action! This is a small moth that lays eggs on the blossom end of Apple and Pear fruit. The larvae them bore into and ruin your fruit. Check out the publications and links below to help you choose the best control for your landscape.

Fire Blight Confirmed

Apple    All Locations

Erwinia Amylavora

Posted on: May 18, 2018 by Rich Guggenheim

Fire Blight has been confirmed in Canyon County. This bacterial infection can attack anything in the rose family (Rosaceae). It is especially destructive to apples (Malus spp.), pears (Pyrus spp.), and crabapples (Malus spp.). There is no cure for fire blight. Prevention is the best solution. Purchase resistant varieties, minimize rapid growth and succulent tissue, prune out blighted twigs and cankered branches. Check out the publications and websites below for more information.

http://treefruit.wsu.edu/crop-protection/disease-management/fire-blight/

https://masters.agron.iastate.edu/redirect/514/lesson04/FireBlight.html

http://extension.colostate.edu/docs/pubs/garden/02907.pdf

Pear Blister Mite

Tree Fruits    All Locations

Eriophyes pyri

Posted on: May 9, 2018 by Rich Guggenheim

Pear leaf blister mite, Eriophyes (=Phytoptus) pyri , is an eriophyid mite found on pear, and apple. Young trees can be damaged by severe infestations.
CONTROL:
Treat large infestations in early fall, before leaf drop, when mites are migrating from leaves to buds. Options include carbaryl, horticultural oil, or lime sulfur. Dormant oil applications in spring are also effective. Blister mites cannot be treated in summer.

Peach Leaf Curl

Tree Fruits    All Locations

Peach Leaf Curl

Posted on: May 8, 2018 by Rich Guggenheim

Taphrina deformans

Peach leaf curl is affecting peach leaves now. Proper timing of fungicides, in the fall, can prevent this disease aLime sulfur or Ziram work great for commercial growers. Home grown trees will need something but avoid Monterey Liqui-Cop as it did not work. Ortho MAX Garden Disease Control was a little better than nothing. Bottom line for home growing - replace with a resistant tree after the current ones dies.

» https://pnwhandbooks.org/plantdisease/host-disease/peach-prunus-persica-leaf-curl

» http://ipm.ucanr.edu/PMG/PESTNOTES/pn7426.html

» https://extension.usu.edu/files/publications/factsheet/peach-leafcurl.pdf

» http://extension.oregonstate.edu/gardening/node/924

lygus bug in alfalfa seed, 2018

All Crops    All Locations

lygus bug

Posted on: May 7, 2018 by Jerry Neufeld

The Lygus degree day calculator hosted by Integrated Plant Protection Center at Oregon State University and the IPM Centers - PNW Coalition shows that, depending on your location in the Treasure Valley, we have accumulated 280 to 290 degree days between January 1, 2018 and May 7, 2018. As you move west in the Treasure Valley the growing degree days increase. This is a few days ahead of 2017 and a few days ahead of the 30-year average; once again, this varies depending on your location. Peak emergence of lygus bug 1st and 2nd instar nymphs occurs right around 272 accumulated degree days; this should be about right now, and is the time monitoring for lygus bugs in alfalfa seed fields should begin.

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

sugarbeet root maggot, 2018

Sugarbeets    Treasure Valley

sugarbeet root maggot

Posted on: May 7, 2018 by Jerry Neufeld

The degree day calculator (hosted by the Integrated Plant Protection Center at Oregon State University; http://uspest.org/cgi-bin/ddmodel.us) for the sugar beet root maggot fly shows that—depending on your location in the Treasure Valley—we have accumulated 360 growing degree days since January 1, 2018. Peak flight of root maggot flies should occur after 360 accumulated growing degree days when the maximum high temperature exceeds 80 degrees F. In the Treasure Valley this should be this week.

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. If you haven’t applied a treatment for sugarbeet root maggot, now is the time to do so. The link below from the 2018 PNW Insect Management handbook contains additional information. Visit with your field consultant from AMSCO for treatment options.

Hail damage to onions

Onion    Treasure Valley

Hail Damage

Posted on: May 7, 2018 by Stuart Reitz

A strong thunderstorm with high winds and hail crossed through parts of the valley Sunday evening. According to the National Weather Service, it went from Nyssa to the Fruitland and Payette areas.

If your onions were damaged in the storm, remember that the plants will benefit from a protective bactericide/fungicide application. Hail can create small and large wounds that leave plants extremely vulnerable to diseases.

As soon as you can get on the field, apply a copper containing protectant spray. Copper protects against bacterial and fungal diseases so it is a better option than fungicides that do not contain copper. This will help prevent infections while those wounds heal. The sooner after any damage occurs, the better.

Peach Tree Borer

Tree Fruits    All Locations

Synanthedon exitiosa

Posted on: May 4, 2018 by Rich Guggenheim

Peach tree borer are in the clear wing moth category. They usually attack prunus trees near the ground. Signs of infestation include gumosis oozing from the trunk near the soil.
Peachtree borer eggs are laid during the summer on the bark at the base of trees. Larvae overwinter in the tree trunk near the soil line. They feed in the crown area and burrow up into the tree

Free Pesticide Disposal

All Crops    All Locations

Posted on: April 30, 2018 by Jerry Neufeld

The Idaho State Department of Agriculture is conducting free pesticide disposals in four locations during May. Click on the pdf below for more information.

Onion thrips in Volunteer Onions

All Crops    All Locations

Posted on: April 27, 2018 by Stuart Reitz

Onion thrips are starting to show up in greater numbers (both adults and immatures) on volunteer onions and other weeds. Volunteer onions serve as a host for both onion thrips and Iris Yellow Spot Virus. After a slight cool down, temperatures will be back in the 80s by the middle of next week - ideal conditions for development of thrips populations and their movement into current season onion fields.

If you have onion fields you would like included in our onion monitoring project, please contact stuart.reitz@oregonstate.edu / 541-881-1417.

Survey on Alfalfa Thrips

All Crops    All Locations

Posted on: April 26, 2018 by Jason Thomas

Insect pests come and go in crops as conditions change. To learn more about the current state of thrips, a small insect that can occur in alfalfa the University of Idaho Extension service is conducting a survey about these insects. We encourage all those who work with alfalfa, including consultants to take this 3-minute survey. To thank you for your time, you will be entered into a raffle to win one of four $25 Amazon Gift Cards. Please share this with as many other farmers and consultants who work with alfalfa as possible so we can learn more about these pests.

2018 Spring Garden Festival.

Announcements    All Locations

2018 Spring Garden Festival. Credits available!

Posted on: April 16, 2018 by Rich Guggenheim

The University of Idaho Extension Master Gardener Volunteers are hosting their 2018 Spring Garden Festival. Happening on April 21st from 9-4 at the UI Extension Office located at 501 Main St in Caldwell, this all day event will feature 4 tracks of concurrent courses.
Cost $30.
The pesticide track will offer ISDA recertification credits.
The arboriculture track will offer ISA credits for certified arborists.
The JMG track offers professional development for teachers.
And there is a gardening 10 track for those who simply want to explore the basics.
Whether you are a beginner or an expert, this event has something to help everyone grow! There is also a free plant sale featuring plants grown by Master Gardener volunteers!
For more information, and to register, call 208-459-6003.

Potato Virus Detection Training Workshops

Potato    All Locations

Posted on: April 16, 2018 by Nora Olsen

Due to the success of our Potato Virus Detection Training Workshop at Othello WA in 2016, we are hosting another set of workshops in 2018 at three locations: Othello WA, Antigo WI and Presque Isle ME. These workshops will cover field identification of PVY (strains O, N-Wi and NTN), including visual identification of foliar symptoms on 20 cultivars commonly grown in each region. Recent standardization of seed certification programs across the U.S. includes the requirement for documentation of inspector training. However, this training will also be beneficial to growers, people who rogue, and those in the potato industry in general. We expect a high attendance rate so please sign up early! Locations, dates and times are listed below. Additional details can be found on our registration page Potato Virus Detection Training Workshop Registration.

Othello, WA
Date/Time: Thursday June 21, 2018. This workshop will be integrated into the Washington State University Potato Field Day, 8:30 a.m. to 1 p.m.
Location: Washington State University Research Farm, 1471 West Cox Road, Othello, WA
You are also invited to these events held nearby:
• Tuesday June 19, Final WA Commercial Potato Seed Lot Reading for 2018, 1471 West Cox Road, Othello, WA, 8:30 a.m. to 2:30 p.m.
• Wednesday June 20, Oregon State University Potato Field Day, OSU Research and Extension Center, 2121 South 1st Street, Hermiston, OR

Antigo, WI
Date/Time: Thursday July 26, 2018, 9:30 to 11:30 a.m. in advance of the Langlade Ag Research Station County Field Day, 1 to 3:30 p.m.
Location: University of Wisconsin Langlade Agricultural Research Station, Langlade County Airport, N3689 Langlade Road, Antigo, WI

Presque Isle, ME
Date/Time: Tuesday July 10, 2018, 10 a.m. to 12 p.m. for inspectors and 2 to 4 p.m. for growers and field staff, with a rain date on Thursday July 12.
Location: University of Maine Aroostook Farm, 59 Houlton Road, US Route 1, Presque Isle, Maine

University and USDA experts will be available at each location to give you a tour and answer your questions. These workshops are part of a USDA NIFA Specialty Crops Initiative award #2014-51181-22373 titled “Biological and economic impacts of emerging potato tuber necrotic viruses and the development of comprehensive and sustainable management practices”.

To register for the event please visit Potato Virus Detection Training Workshop Registration.
For more information about the workshop please email pbg-potatovirus@cornell.edu.

Growing a great lawn! Free workshop!!!

Landscape and Garden    All Locations

Green lawns!

Posted on: April 11, 2018 by Rich Guggenheim

Growing a GREAT Lawn is a free workshop being held from 9-12 at Nampa's Lakeview Park on April 14th from 10-12. Register online at the Nampa Parks and Rec website. This workshop will be taught by University of Idaho Extension horticulture professor and state Master Gardener Coordinator, Rich Guggenheim. You will learn how to grow a healthy, green lawn while cutting the need for fertilizer, pesticides, and reducing your water consumption.
Call 468-5890 for more info.

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