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2015 Potato psyllid monitoring program underway
Potato All Locations
potato psyllids
Posted on: May 22, 2015 by Erik Wenninger
The University of Idaho, in collaboration with Miller Research and several crop consultants across the state is continuing our monitoring program for potato psyllids, zebra chip, and liberibacter (Lso), the bacterium that causes zebra chip.
Monitoring on 17 of our “Light” sites began last week (all in the Treasure Valley) and 4 of our “Intense” sites (all in the Magic Valley) with the deployment of sticky cards. We found no potato psyllids on cards at any of these sites this week. Deployment of sticky cards began on many more sites this week as well. We expect to have a total of around 75 “Light” sites and 13 “Intense” sites across the state; this is similar to last year.
Online spreadsheets showing details of the psyllid captures in potato fields will go live next week.
We have been monitoring for psyllids within presumed overwintering habitat, including bittersweet nightshade and field bindweed sites, and we found 8 adult potato psyllids and many nymphs on bittersweet nightshade this week in Twin Falls County (no psyllids were found in Treasure Valley sites this week). These psyllids are now in transit to Moscow to be tested for Lso.
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/extension/news/psyllid-management
test email
All Crops Treasure Valley
this is a test email
Posted on: May 22, 2015 by Jerry Neufeld
We are testing the system. Sorry for the inconvenience, but I hope you have a good weekend!
Weed management in potatoes
Potato All Locations
Weeds
Posted on: May 21, 2015 by Pam Hutchinson
I’ve had many calls about weed control in potatoes because of high rainfall amounts, excessive soil moisture this spring.
Please see the attached WORD document for my thoughts on what may happen - what are the possibilities for weed control in potatoes due to these conditions.
Western Cherry Fruit Fly Treatment Forecast
Tree Fruits Treasure Valley
Western Cherry Fruit Fly
Posted on: May 21, 2015 by Paul Castrovillo
According to the degree-day model from the Online Phenology and Degree-Day Models published at the OSU Integrated Plant Protection Center Website the forecasted dates for beginning treatment against Western Cherry Fruit Fly are: Ontario (May 25), Caldwell (May 29), Boise and Parma (June 4), Nampa (June 5) and Emmett (June 9). These are based on recommended first treatment at 1060 degree-days per "Orchard Pest Management" as published by the "Good Fruit Grower", Yakima 1993.
The first Idaho Western Cherry Fruit Fly for 2015 was recently found in a trap in Homedale on May 19.
Iris yellow spot in volunteer onions
Onion Treasure Valley
Iris Yellow Spot / Onion thrips
Posted on: May 21, 2015 by Stuart Reitz
Several volunteer onions with Iris yellow spot virus (IYSV) have been found this week in Malheur County. Volunteer onions can serve as a source virus-infected thrips to move into this season's onion crop. Although the virus has not yet been found in this season's bulb fields, please continue to monitor fields carefully.
If you see potentially symptomatic plants that you would like tested for virus or have questions about thrips and the virus, please contact Stuart Reitz, Malheur County Extension, 541-881-1417.
Coddling Moth Timing
Tree Fruits All Locations
Coddling Moth
Posted on: May 19, 2015 by Tony McCammon
Wilbur Ellis Spray Scheduling for this week:
Fruitland/Payette May 24th 350 DD
Parma/ Roswell May 23rd 350 DD
SunnySlope May 23rd 350 DD
Magic Valley May 25 350 DD
Pocatello May 30 350 DD
Rexburg June15 350 DD
Onion Bulb Mites
Onion Treasure Valley
Onion Bulb MIte
Posted on: May 15, 2015 by Stuart Reitz
Onion bulb mites have been found in several onion fields across the Treasure Valley. So far numbers appear to be low but they may be a contributing factor to stand losses.
Bulb mites can overwinter in the soil on decomposing vegetation or on volunteer onions in the field and in cull piles. Mild winter weather may have reduced their natural overwinter mortality.
Management relies on preventative measures, such as field sanitation and fumigation of fields with a history of problems.
If you have questions or concerns about onion bulb mites, please contact Stuart Reitz, Malheur County Extension, 541-881-1417, stuart.reitz@oregonstate.edu.
Parma Cereal Field Day - June 25
Small Grains Treasure Valley
Posted on: May 13, 2015 by Olga Walsh
sugarbeet root maggot
Sugarbeets Treasure Valley - Idaho
sugarbeet root maggot
Posted on: May 6, 2015 by Jerry Neufeld
The degree day calculator (hosted by the Integrated Plant Protection Center at Oregon State University) for the sugar beet root maggot fly shows that—depending on your location in the Treasure Valley—we have accumulated 394 degree days since March 1, 2015. Peak flight of root maggot flies should occur after 360 accumulated degree days when the maximum high temperature exceeds 80 degrees F. In the Treasure Valley this is right about right now. We are 9 days ahead of last year.
Root maggot flies will lay eggs near sugarbeet plants. After the larvae hatch they will begin feeding on the young sugarbeets. AMSCO representatives I spoke with have not seen any adult flies yet. 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. Consult your field representative from AMSCO for treatment options.
Stripe rust
Small Grains Treasure Valley - Oregon
Stripe rust
Posted on: May 6, 2015 by Bill Buhrig
Stripe rust has been found in a winter wheat field in Malheur County. The infected field had small patches of stripe rust but was not thoroughly distributed. This discovery falls in line with stripe rust being found in Canyon County. Work with your field consultants and incorporate good scouting procedures for your fields to develop a plan of action as necessary.
Please check out the links attached. One is from the PNW Plant Disease Management Handbook and the other is from Juliet Marshall with the U of I and has been linked prior on the PNWPestalert site. Both have great information on stripe rust.
» http://pnwhandbooks.org/plantdisease/wheat-triticum-aestivum-stripe-rust-yellow-rust
Update on Idaho Potato Psyllid Monitoring
Potato All Locations
potato psyllids
Posted on: May 1, 2015 by Erik Wenninger
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 is funded in part by IPC, ISDA, and USDA. More details on the program will be forthcoming, but it will be similar to what we’ve done over the last two years.
We have been monitoring for psyllids during the off-season within presumed overwintering habitat, including bittersweet nightshade and field bindweed sites, as well as within last year’s potato plots at the Kimberly Research & Extension Center (which have been bare soil all winter). We’ve been finding psyllids in relatively low numbers on bittersweet nightshade and field bindweed intermittently throughout the off-season, but for the first time since last fall we found several potato psyllids on sticky cards within the bare fields at KREC. It is too early to tell what kind of psyllid year we will have, but finding apparently dispersing psyllids this early (during the previous three years psyllids had not appeared until June) suggests that we all should be on the lookout early this year for potato psyllids.
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
» http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
Cereal Leaf Beetle in Winter Wheat, Parma
Small Grains Treasure Valley - Idaho
Cereal Leaf Beetle
Posted on: April 29, 2015 by Olga Walsh
Cereal leaf beetle infestation was identified in winter wheat experimental plots at the University of Idaho Parma Research and Extension Center as well as in surrounding grower fields in Canyon County. The typical feeding patterns, eggs and larvae have been confirmed by Dr. James Barbour, UI IPM Specialist. The first symptoms of infestation became apparent last week. Currently, most plants have at least one leaf with obvious feeding damage. The cereal leaf beetle has a variety of hosts among cereals and grasses with preference to oat, barley, wheat, rye, timothy, fescue, grain sorghum and corn. Substantial crop yield loss and quality decrease can be expected due to lost photosynthetic activity resulting from the feeding damage.
Cereal leaf beetle is a quarantined insect the U.S., which means that the presence of beetles in grain restricts exports to uninfested areas. Fumigation is required to prevent the spread of beetle infestation.
Scouting of fields is vital both before and during the boot stage to assess for cereal leaf beetle presence and damage. It is recommended to scout weekly by walking through the field in a “W” pattern for best coverage. Stop at 5-10 locations depending on field size and examine 10 plants per location. Count the number of eggs and larvae per plant for smaller plants or per stem for larger plants.
Treatment thresholds: 3 larvae per plant and/or 3 eggs per plant before boot stage, and 1 larva per flag leaf after boot stage.
Management-chemical control (From PNW Insect Management Handbook)
• bifenthrin (BrigadeÆ 2EC and WSB) at 6.4 fl oz/a (0.1 lb ai/a). Apply in spring if one or more eggs or larvae are detected or in late summer if beetles are defoliating seedling stands. Maximum amount allowed 12.8 fl oz/a (0.2 lb ai/a) per season but no more than once every 12 days. PHI 30 days prior to harvest for forage, hay and seed.
• cyfluthrin (Baythroid XL) at 0.013 to 0.015 lb ai/a. PHI 0 days. REI 12 hr. Maximum amount allowed per 5 day interval is 0.022 lb ai/a. Maximum amount allowed per crop season is 0.089 lb ai/a.
• lambda-cyhalothrin (Warrior) at 0.02 to 0.03 lb ai/a. PHI 0 days for grazing and forage, 7 days for straw and seed crop. REI 24 hr.
• zeta-cypermethrin (Mustang MAX) at 0.0175 to 0.025 lb ai/a. PHI 0 days forage, hay; 7 days straw and seed screenings. REI 12 hr. For forage and hay use no more than 0.10 lb ai/a per season; make subsequent applications no closer than 7 days. For straw and seed screenings use no more than 0.125 lb ai/a per season; make subsequent applications no closer than 17 days.
» http://www.cals.uidaho.edu/edcomm/pdf/CIS/CIS0994.pdf
» http://insect.pnwhandbooks.org/legume-grass-field-seed/grass-seed/grass-seed-cereal-leaf-beetle
Stripe rust in wheat
Small Grains All Locations
Stripe rust
Posted on: April 29, 2015 by Juliet Marshall
Stripe rust was found (thanks Dr. Oliver Neher for being so observant!) in the Parma area, on the Parma research station in winter wheat that's in the boot stage. While not yet severe, I fully expect it to be widespread. Be prepared to spray susceptible varieties as stripe rust heads east.
Information on variety reactions is available in our small grains report (in variety descriptions and in an appendix table that describes spring wheat reactions).
http://www.uidaho.edu/extension/cereals/scseidaho/sgr
Also check the disease page on our website for additional information:
http://www.uidaho.edu/extension/cereals/scseidaho/disease
» http://www.uidaho.edu/extension/cereals/scseidaho/sgr
Weevil in alfalfa
Alfalfa Treasure Valley - Oregon
Alfalfa weevil
Posted on: April 28, 2015 by Bill Buhrig
Alfalfa weevil are at or approaching threshold levels for treatment in forage alfalfa fields around the western Treasure Valley. Older stands are more likely to see increased pressure when compared to younger fields. Proper scouting in addition to working with your field consultants will help determine the need for treatment. Be aware of pre-harvest intervals restrictions of the products you may use. Check out the attached link from the PNW Insect Management Handbook for more information on treatment threshold and options.
» http://insect.pnwhandbooks.org/hay-pasture/alfalfa/alfalfa-hay-alfalfa-weevil
Fruit Pest Advisory Issue 2
Tree Fruits All Locations
Codling Moth, Aphids, Fireblight, Thinning recommendations
Posted on: April 23, 2015 by Tony McCammon
This is the second Pest advisory, Things are not slowing down, if you have a crop to protect get prepared.
ISDA pesticide disposal program
Announcements Treasure Valley
Posted on: April 13, 2015 by Jerry Neufeld
Click on the link below for information about Idaho State Department of Agriculture’s pesticide disposal program which will be conducted in SW and North Idaho during May, 2015.
» http://www.idahoag.us/Categories/Pesticides/Documents/PDP%20Doc/2015PDPSpringFlyer.pdf
Fruit Pest Advisory Issue 1
Tree Fruits All Locations
Posted on: April 7, 2015 by Tony McCammon
Here is the first Pest advisory for fruit crops in Idaho for this year. More to come.
tomato and potato late blight brochure
Potato Treasure Valley
late blight
Posted on: April 7, 2015 by Jerry Neufeld
Attached is a pdf from Dr. Phill Wharton, U of Idaho Potato Pathologist, with information about Tomato and Potato late blight, and 10 tips to prevent late blight.
BYD problems in winter grain
Small Grains All Locations
Barley Yellow Dwarf Virus
Posted on: March 27, 2015 by Juliet Marshall
Our winter wheat and winter barley crops have broken dormancy very early - I’d say we are 3 - 4 weeks ahead of “average" and almost all of our spring wheat is planted.
About 3 weeks ago, we started having symptoms of BYD showing in winter cereal fields. Two times in the last two weeks I have taken a tour through the southern part of the state. In most areas, 85-95% of our winter wheat fields are showing 95-100% incidence. Some are severe, and growers are removing (spraying and plowing) some of these fields and replanting spring grain or dry beans. Growth stages are tillering to jointing.
Contributing factors include unusual rains last August, high populations of aphids in the fall (especially in the corn that was green chopped), a long fall, and we have had one of the warmest winters / earliest springs on record. Full rates of insecticidal seed treatments have been ineffective due to a long warm fall and high aphid populations.
Dr. Arash Rashed and I have been wiring very hard to obtain ELISA and qPCR confirmation before sending out too many alerts to the growers. I did send an alert March 16th, but didn’t want to do another until we had proof positive - double - that what we were seeing was totally accurate. It is so widespread that even I was questioning myself. It is EVERYWHERE - from Parma to Idaho Falls and Ririe.
We also have severe drought conditions, which makes mitigation more difficult and damage potentially more severe. Many growers will not be able to apply irrigation for another 1-3 weeks.
We have virus in wheat, barley, timothy and field borders, roadsides, ditch banks, and farmyard grasses.I expect greater than 30% losses, in some fields greater than 60% losses. Winter malt barley fields will not make malt. Many winter wheat fields will have to go for feed.
Barley Yellow Dwarf Virus in Winter Wheat
Small Grains Treasure Valley - Idaho
Barley Yellow Dwarf Virus
Posted on: March 20, 2015 by Olga Walsh
Onion thrips on volunteer onions
Onion Treasure Valley
Onion thrips
Posted on: March 17, 2015 by Stuart Reitz
Onion thrips are present on volunteer onions that have resprouted from last year's onion fields. Both adult and immature thrips are present.
Volunteer onions can serve as a reservoir for thrips and Iris yellow spot virus to infest nearby onion fields. Control of volunteer onions may help to reduce thrips and Iris yellow spot pressure this season.
BYDV confirmed
Small Grains All Locations
BYDV
Posted on: March 12, 2015 by Juliet Marshall
Winter wheat and winter barley is showing significant symptoms of BYDV in Burley area. See the publication for additional information.
Symptoms have been confirmed with ELISA and PCR.
Climate Trends in the Pacific Northwest
Announcements Treasure Valley
Posted on: February 26, 2015 by Bill Buhrig
Please check out the attachment talking about Climate Trends in the Pacific Northwest coming up in Ontario on March 3rd from 1-5pm. This will be held at the Four Rivers Cultural Center. The workshop will focus on regional observations in the field of climate research by scientists associated with Oregon State University. The workshop will address recent/current conditions and how changing trends may affect the long term production in Northeast Oregon and the Pacific Northwest. Geologic mapping and the use of this technology to estimate ground and surface water trends and recharge will be covered. The workshop will close with an open discussion to allow you an opportunity to contribute to your thoughts/ideas regarding climate trends and the opportunities & challenges agriculture could face in the future. Setting up to be pretty interesting and we hope to see you there!
cull onion disposal in the Treasure Valley
Onion Treasure Valley
onion maggot
Posted on: February 25, 2015 by Jerry Neufeld
The Idaho State Department of Agriculture has prepared a news release reminding the onion industry about the rules for cull onion disposal to control onion maggot in the Treasure Valley of Idaho. Click on the pdf below for more detailed information.
Direct Seed Workshop, Idaho Falls March 11
Small Grains All Locations
Meeting announcment
Posted on: February 11, 2015 by Juliet Marshall
Direct Seed Workshop - March 11, 2014
Shilo Inn, Idaho Falls, 780 Lindsay Blvd
Direct Seed 101—Grower Panel
High Residue Farming In Irrigated Cropping Systems
Alfalfa to No-Till Corn: A Cropping Rotation We Can Learn From & Glyphosate Usage
Soil Moisture, Nutrients, and Weeds in No-Till cropping Systems
Why Understand Wireworms at a Fundamental Level?
» http://www.idahowheat.org/education/direct-seed-workshop.aspx
