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Iris yellow spot virus in Onion bulb fields
Onion Treasure Valley
Iris yellow spot virus / Onion thrips
Posted on: July 10, 2017 by Stuart Reitz
Iris yellow spot virus was detected at the end of last week in commercial onion fields in Malheur County, Canyon County, Payette County and Washington County. So far, only a few infected plants were found but no widespread outbreaks were found.
Maintaining good thrips management will help limit the spread and severity of the disease. Infective adult thrips spread the virus from plant to plant as well as within a plant. Infective juveniles also can spread the virus within a plant.
In addition to thrips management, minimize stress on onion plants by making sure fields are maintained at an adequate but not excessive fertility level, and that the soil moisture is kept at about the 20 centibar level. This will help reduce the severity of virus symptoms.
Please contact Stuart Reitz at Malheur County Extension (541-881-1417 / stuart.reitz@oregonstate.edu) if you have questions about your onion fields or would like assistance with virus diagnosis.
2017 Summer Farm Festival and Malheur Experiment Station Field Day
All Crops All Locations
Posted on: July 10, 2017 by Janet Jones
Wednesday July 12, 2017
8:00 AM - 9:00 AM
Registration - All events and tours are open to the public
8:30 AM—9:30 AM
Tour A. Drone demonstration
9:30 AM - 10:20 AM
Tour B. Onion and potato drip irrigation tour. We will show case a study evaluating the response of multiple onion cultivars to the recently registered method of applying Outlook (dimethenamid-p) through drip irrigation. Evaluation of drip irrigation and comparison to sprinkler irrigation for potato in an attempt to lower the comparative cost of drip irrigation. Latest work on internal rot in onion.
10:30 AM - 11:50 AM
Tour C. Onions, Spuds, and More. Control of onion thrips. Control of potato psyllids. Weed control for onions, potatoes, corn, and sweet potatoes.
Tour D. Alternative Crops
This tour will highlight quinoa and wildflower seed production.
Tour E. Tour for youth. Wildlife, Solar Eclipse, Water, Soils, and Drones! A fun tour designed to educate young people about sage grouse, animal tracking and capture, the solar eclipse, the importance of water and soils, and modern drones.
12:00 Free Lunch
12:20 PM Update on GMO Creeping Bentgrass, Danielle Posch
12:30 PM Honoring our community members
UI Extension Cereals Field Days are this week in Rupert, Idaho Falls, and Aberdeen
Small Grains All Locations
Posted on: July 10, 2017 by Juliet Marshall
The southern / eastern Idaho Cereals Extension Field days will be
Tuesday (Rupert/Minidoka) July 11th
Wednesday (Idaho Falls) July 12th
Thursday (Aberdeen) July 13th
We will be speaking about varieties, diseases, insects and management issues. Hope to see you there!!
For times and locations, please see the attached PDF files.
First Lso-positive psyllid found in Power County this year
Potato All Locations
potato psyllids
Posted on: July 7, 2017 by Erik Wenninger
One psyllid collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. This psyllid was found in a field in Power County.
Psyllids were collected this week on sticky traps in potato in the following counties: Gooding (1 field), Jerome (5 fields), Twin Falls (2 fields), Minidoka (3 fields), Cassia (5 fields), and Power (4 fields).
This week, we collected 31 psyllids from sticky cards (21 from Light sites and 10 from Intense sites).
We had traps deployed in 95 of the 96 fields that are being monitored this year and found psyllids in 20 of these 95 fields (21.1%).
As always, we urge growers and crop consultants to have an IPM program in place.
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.
Three Cereal Extension Field Days next week - Rupert / Minidoka, Idaho Falls and Aberdeen
Small Grains All Locations
Cereals Extension Field Days
Posted on: July 6, 2017 by Juliet Marshall
The southern / eastern Idaho Cereals Extension Field days will be
Tuesday (Rupert/Minidoka) July 11th
Wednesday (Idaho Falls) July 12th
Thursday (Aberdeen) July 13th
We will be speaking about varieties, diseases, insects and management issues. Hope to see you there!!
For times and locations, please see the attached PDF file.
Powdery Mildew and Spider MItes in Sugarbeets
Sugarbeets All Locations
powdery mildew and spider mites
Posted on: July 6, 2017 by Jerry Neufeld
Powdery mildew and spider mites have been found by Amalgamated Sugar Company Crop Consultants in the Roswell, Weiser and Adrian, Oregon areas. There are several fungicides available for use to treat powdery mildew. Depending on the disease pressure and chemistry used, applications with different chemistries should be repeated every 7 to 14 days. Contact your crop consultant from the Amalgamated Sugar Company if you have questions about treatment options for these pests.
Click on the links below for the powdery mildew and spider mite pages in the PNW Plant Disease and Insect Management Handbooks.
» https://pnwhandbooks.org/plantdisease/host-disease/sugar-beet-beta-vulgaris-powdery-mildew
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-spider-mite
June 30, 2017 – More psyllids found in Treasure and Magic Valleys
Potato All Locations
Potato Psyllid
Posted on: June 30, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Jerome (1 field), Cassia (1 field), Canyon (2 fields), and Minidoka (1 field).
This week, we collected 9 psyllids from sticky cards (3 from Light sites and 6 from Intense sites).
We had traps deployed in 93 of the estimated 96 fields (96.8%) that will be monitored this year and found psyllids in 5 of these 93 fields (5.3%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program in place.
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.
Armyworms, Loopers and False Celery Leaftier in Sugarbeets
Sugarbeets Treasure Valley
army worms, loopers, False Celery Leaftier
Posted on: June 29, 2017 by Jerry Neufeld
Kevin Foulger, Crop Consultant with Amalgamated Sugar Company is reporting that loopers, armyworms and False Celery Leaftier have been found in sugarbeet fields on the west end of the Treasure Valley, mostly in the Adrian area. These pests will defoliate leaves, leaving only the leaf veins and petioles if left untreated. The links below will take you to the PNW Insect Management Handbook for control measures. I have also attached a couple of images provided by Kevin. If you have any questions, contact your Crop Consultant from Amalgamated Sugar Company for more information.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-armyworm
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-looper
» http://www.cals.uidaho.edu/edcomm/keys/plates/plate66.htm
» Armyworm
Malheur Experiment Station Field Day July 12
All Crops All Locations
Posted on: June 29, 2017 by Janet Jones
You are invited to the Malheur Experiment Station Summer Farm Festival and Annual Field Day!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
Date: Wednesday July 12, 2017
Registration starts at 8:00am with coffee and donuts
Click on the PDF below for the tour descriptions and schedule.
Also featured:
- Agricultural trade show booths!
- Events and contests with prizes!
A complimentary lunch will be served at noon.
Please RSVP for lunch or if you need more information call Jan Jones at (541) 889-2174 or email janet.jones@oregonstate.edu.
First potato psyllid found in Eastern Idaho during 2017 monitoring
Potato All Locations
Potato Psyllid
Posted on: June 23, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Twin Falls (2 fields), Cassia (1 field), Power (1 field), and Minidoka (1 field).
This week, we collected 7 psyllids from sticky cards (6 from Light sites and 1 from Intense sites).
We had traps deployed in 93 of the estimated 96 fields (96.8%) that will be monitored this year and found psyllids in 5 of these 93 fields (5.3%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program in place.
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.
June 16, 2017 – More potato psyllids found in Magic Valley
Potato All Locations
Potato Psyllid
Posted on: June 16, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Twin Falls (1 field) and Jerome (1 field).
This week, we collected 2 psyllids from sticky cards (1 from Light sites and 1 from Intense sites).
We had traps deployed in 78 of the estimated 96 fields (81.2%) that will be monitored this year and found psyllids in 2 of these 78 fields (2.5%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program in place.
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.
U of Idaho Parma Field Day - 2017
All Crops All Locations
Posted on: June 16, 2017 by Jerry Neufeld
This is a reminder that the University of Idaho Parma R and E Center will be hosting a Field Day on the morning of June 21, 2017. Stop by and visit with our faculty and staff about our 2017 research projects, see our facility and have lunch and refreshments with us. Please RSVP by calling 722-6701 or emailing laphillips@uidaho.edu to let them know you plan to attend. Idaho Pesticide Applicator Recertification and CCA credits will be issued. For additional information visit our web site, http://www.uidaho.edu/cals/parma-research-and-extension-center , or click on the pdf below.
Cereal Field Days - Schedule for Southern / Eastern Idaho
All Crops All Locations
Pests and Varieties of Wheat and Barley
Posted on: June 12, 2017 by Juliet Marshall
Attached is the schedule for the Southern / Eastern Idaho Cereal-related Field Days hosted by the UI Extension and Agricultural Experiment Stations.
First potato psyllids found in Treasure Valley
Potato All Locations
Potato Psyllid
Posted on: June 9, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Cassia (1 field) and Canyon (2 fields).
This week, we collected 3 psyllids from sticky cards (1 from Light sites and 2 from Intense sites).
We had traps deployed in 67 of the estimated 96 fields (69.7%) that will be monitored this year and found psyllids in 3 of these 67 fields (4.4%).
All psyllids collected last week tested negative for Lso (liberibacter), the bacterium that causes zebra chip
As always, we urge growers and crop consultants to have an IPM program in place.
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.
Snake River Weed Research Tour at the Malheur Experiment Station on June 14
Announcements Treasure Valley
Posted on: June 7, 2017 by Bill Buhrig
It is time for the annual Weed Research Tour at the Malheur Experiment Station! The public is invited to attend. Read on for more information!
Place: Malheur Experiment Station, 595 Onion Ave, Ontario, OR
Date: Wednesday, June 14, 2017
Registration starts at 8:00am with coffee and donuts
The tour will start promptly at 8:30AM and end at 12:00PM.
A complementary lunch will be served at the conclusion of the tour.
Pesticide recertification credits for Idaho and Oregon will be available
The tour will feature research studies for weed management in direct-seeded onion, sugar beet, field corn, sweetpotato, wheat, and potato. The first stop will be at our yellow nutsedge “field laboratory” along Hwy 201 just before crossing the rail tracks (if headed north to Ontario from Nyssa). The stop along Hwy 201 will feature studies on yellow nutsedge control in onion, sugar beet, and field corn. We will then proceed to the station and tour studies on weed control in direct-seeded onion, sweetpotato, field corn, and potato.
Please call 541-889-2174 or email janet.jones@oregonstate.edu if you need more information. Please check out the link for more events coming your way from the good folks at the Malheur Experiment Station.
Seed Piece Decay Due to Soft Rot
Potato Eastern Idaho
Pectobacterium spp.
Posted on: June 5, 2017 by Kasia Kinzer and Phillip Wharton
In the past few weeks we received three separate unrelated calls regarding poorly performing and rotting potato seed pieces in fields in eastern Idaho. Based on field visits and samples that were brought in to the extension seed potato lab in Idaho Falls, the predominant problem appears to be soft rot. The common theme of these samples were that they were from fields which were waterlogged, and most of the seed pieces that we looked at had enlarged lenticels.
Soft rot is caused by bacteria that produce pectolytic enzymes that break down pectin (polysaccharides found in plant cell walls). The soft rot pathogens can also grow and reproduce in environments where oxygen levels are low, a situation that can occur in wet soil. Soft rot pathogens need wounds or enlarged lenticels to gain entry into the potato tuber. They are not able to breach an intact, healthy, uncompromised tuber, which is why soft rot often appears after seed piece decay caused by Fusarium species. More rarely in Idaho, soft rot may follow seed piece decay caused by Pythium leak or late blight. Another important note about soft rot pathogens is that, although they can be tuber-borne, they can also be found in soil and water in the environment.
The seed pieces had been treated with a fungicide dust treatment immediately after cutting, and consequently, low levels to no Fusarium dry rot were observed on the samples. In all three cases, the fields were planted within 48 hours of seed being cut, which means the wounds from cutting were not fully healed. Our spring was particularly wet in most locations across Idaho. The combination of the enlarged lenticels, likely due to wet field conditions, and unhealed wounds on seed pieces planted in wet soils seems to have created the perfect environment for soft rot to thrive.
Unfortunately, there are few measures that can be taken to control soft rot after planting apart from drying out the soil to the extent possible, such as by shutting off or reducing irrigation. In some cases, if soft rot has affected over 50% of the field, and there is sufficient seed available, the grower may want to consider plowing up the field waiting for it to dry out sufficiently and the soil temperature to rise above 55F and then re-planting.
For more information see the attached links or visit www.idahopotatodiseases.org
» http://www.idahopotatodiseases.org/bacterial_soft_rot.html
More potato psyllids found in Magic Valley
Potato All Locations
Potato Psyllid
Posted on: June 2, 2017 by Lucy Standley
Psyllids were collected this week on sticky traps in potato in the following counties: Gooding (1 field), Jerome (1 field), and Minidoka (1 field).
This week, we collected 6 psyllids from sticky cards (2 from Light sites and 4 from Intense sites).
We had traps deployed in 57 of the estimated 83 fields (68.6%) that will be monitored this year and found psyllids in 3 of these 57 fields (5.2%).
As always, we urge growers and crop consultants to have an IPM program in place.
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 Lso-positive potato psyllid found in Idaho this season
Potato All Locations
potato psyllids
Posted on: June 1, 2017 by Erik Wenninger
One psyllid collected last week from a yellow sticky card deployed at the Kimberly Research & Extension Center tested positive for Lso (liberibacter), the bacterium associated with zebra chip disease. No psyllids collected from commercial fields tested positive.
On Friday we will post details on our monitoring results from this week.
We continue to urge growers and crop consultants to implement IPM programs for 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.
May 26, 2017 First potato psyllids found in Idaho potato fields this season
Potato All Locations
Potato Psyllid
Posted on: May 26, 2017 by Lucy Standley
We retrieved our first set of sticky traps from potato fields this season and found on these cards our first potato psyllids for the 2017 potato season.
Potato psyllids were collected on sticky traps in potato in the following counties: Twin Falls (1 field), Minidoka (2 fields).
This week, we collected 3 psyllids from sticky cards (2 from Light sites and 1 from Intense sites).
We had traps deployed in 17 of the estimated 73 fields (23%) that will be monitored this year and found psyllids in 3 of the monitored fields (17.6%).
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.
Lygus Bug emergence in Alfalfa Seed
All Crops All Locations
Lygus bug
Posted on: May 25, 2017 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 257 degree days between January 1, 2017 and May 23, 2017. This is 18 days behind compared to this date in 2016 and 12 days behind the 30-year average. Peak emergence of lygus bug 1st and 2nd instar nymphs should occur right around 272 accumulated degree days: this usually occurs around mid-May, and is the time monitoring for lygus bugs in alfalfa seed fields should begin. Right now that is predicted to occur about May 26.
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. We will plan to put out another alert as we approach 272 degree days in Parma. You can follow the degree accumulation yourself by using the web link at the bottom of this announcement. If all works correctly the location will be set to Parma and the correct model already will be listed. You can adjust the location and other information using the instructions below:
1) Select the location nearest you by selecting the appropriate pin in the map at the top of the page. The above data are for the Parma location. Results likely will vary depending on the location selected.
2) Select “insects” in the category drop down box under the map, then select the “Lygus bug [alfalfa seed] Ben Simko 2000” model from the “Select model” link to the right of the Model box. It should be model 61 in the list.
3) The predicted date for the 275 degree day accumulation for peak 1st and 2nd instar lygus nymphs will be listed in the “DDs Event” text box. You also can view the full model output by selecting the button labeled “Click here to CALC/ RUN model w/daily output”
Thanks for Dr. JIm Barbour for providing this information.
U of Idaho Parma Field Day
Announcements Treasure Valley
Posted on: May 25, 2017 by Jerry Neufeld
The University of Idaho will be hosting a Field Day at the Parma R and E Center on June 21, 2017. Lunch and refreshments will be provided. Please RSVP by calling 722-6701 or emailing laphillips@uidaho.edu to let them know you plan to attend. For additional information click on the pdf below.
Potato Sustainability Audit Manual
All Crops All Locations
None
Posted on: May 24, 2017 by Nora Olsen
Manual and resources now available to help navigate the Potato Sustainability Initiative (PSI) survey and audit
Announcements recently went out on whether you will be audited in person for your 2016 responses to the Potato Sustainability Initiative (PSI) survey. Most process growers are requested to participate in the PSI sustainability survey and approximately 20% of the growers who completed the survey will be audited each year. The audit involves an interview between the grower and auditor with specific questions and an inspection of documents. A manual has been developed to help growers to methodically and successfully gather required documents for the audit, with examples of standard operating procedures, and resources to help answer interview questions. The manual is posted at www.uidaho.edu/cals/potatoes. Changes to this manual will be done periodically to adjust for changes to the PSI survey. The manual was developed by IACI, University of Idaho, and Washington State University with funding from the NW Potato Research Consortium.
2017 Potato psyllid monitoring program underway in Idaho
Potato All Locations
potato psyllids
Posted on: May 18, 2017 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, USDA, and generous in-kind contributions by our collaborators.
The first deployment of sticky cards occurred this week in 12 Treasure Valley sites and 21 Magic Valley sites. Next week we expect to initiate sampling in 15 and 20 additional fields in the Treasure and Magic valleys, respectively.
More details on the program will be forthcoming as we continue to ramp up sampling efforts. 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
» http://www.uidaho.edu/cals/potatoes/news/psyllid-management
sugarbeet root maggot 2017
All Crops All Locations
https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
Posted on: May 16, 2017 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 nearly 360 growing degree days since January 1, 2017. 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 will be very soon.
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 2017 PNW Insect Management handbook contains additional information. Visit with your field consultant from AMSCO for treatment options.
» https://pnwhandbooks.org/insect/agronomic/sugar-beet/sugar-beet-sugar-beet-root-maggot
Lygus Bug in Alfalfa Seed, 2017
All Crops All Locations
Lygus Bug
Posted on: May 16, 2017 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 201 degree days between January 1, 2017 and May 15, 2017. This is 17 days behind compared to this date in 2016 and 10 days ahead of the 30-year average. Peak emergence of lygus bug 1st and 2nd instar nymphs should occur right around 272 accumulated degree days: this usually occurs around mid-May, and is the time monitoring for lygus bugs in alfalfa seed fields should begin. Right now that is predicted to occur about May 25.
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 4th instar nymphs are detected. We will plan to put out another alert as we approach 272 degree days in Parma.
Below are the instructions for using the degree day calculator.
1) Select the location nearest you by selecting the appropriate pin in the map at the top of the page. The above data are for the Parma location. Results likely will vary depending on the location selected.
2) Select “insects” in the category drop down box under the map, then select the “Lygus bug [alfalfa seed] Ben Simko 2000” model from the “Select model” link to the right of the Model box. It should be model 61 in the list.
3) The predicted date for the 275 degree day accumulation for peak 1st and 2nd instar lygus nymphs will be listed in the “DDs Event” text box. You also can view the full model output by selecting the button labeled “Click here to CALC/ RUN model w/daily output”
