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Cereals Tour in Parma this week
Small Grains Treasure Valley - Oregon
Posted on: June 23, 2015 by Bill Buhrig
Here is a quick reminder about the OSU/UI Cereal Tour in Parma this Thursday (June 25). We will start at noon with lunch and then wander out to the plots. Check out the attached flier for more information!
Farm Fest at the Malheur Experiment Station
Announcements Treasure Valley - Oregon
Posted on: June 22, 2015 by Bill Buhrig
You are invited to Farm Fest on July 8 at the OSU Malheur Experiment Station! Please see the attached flier in addition to a registration form for those who might be interested in having a booth. Call the Exp. Station if you have any questions: 541-889-2174. More information will be posted as it is made available.
It will be a good time!
Farm Fest at the Malheur Experiment Station
Announcements Treasure Valley - Oregon
Posted on: June 22, 2015 by Bill Buhrig
You are invited to Farm Fest on July 8 at the OSU Malheur Experiment Station! Please see the attached flier in addition to a registration form for those who might be interested in having a booth. Call the Exp. Station if you have any questions: 541-889-2174. More information will be posted as it is made available.
It will be a good time!
Potato Pest Alert for the week ending 6-19-2015
Potato All Locations
Posted on: June 19, 2015 by Phill Wharton
The weather has finally turned and the sun has come out. In most growing areas this week temperatures have been in the 80’s or higher. With the dry warm weather across the snake river valley the risk of a late blight outbreak is low. However, micro-climates may exist in fields where conditions are conducive for late blight. Areas such as low spots where soil moisture is highest and parts of the field shaded by windbreaks are examples of areas where scouting should be intensified. For information on what fungicides to use for managing late blight see the article recently published by Dr. Jeff Miller of Miller Research and Dr. Phill Wharton from UI (http://bit.ly/1Q4tmty).
In the Treasure Valley area and western Idaho most potato crops are now past row closure and the first reports of early blight are starting to come in. For information on early blight control see (http://bit.ly/1CinqBN). Whatever product you use to control early blight it is always recommended that you tank mix it with a protectant fungicide such as Chlorothalonil or Dithane, unless the product already contains it (e.g. Gavel or Zing!). This reduces the chances of fungicide resistance development.
In the Magic Valley area most crops are just at row closure and it is around this time that growers should be making their first application for early blight/ white mold control. Dr. Jeff Miller reports that in fields that didn't receive an insecticide treatment at planting, Colorado beetles are beginning to appear.
In east and north eastern part of the state (Pocatello up through Tetonia) crops are between the 6-8” stage and touching in the rows. There have not been any reports of disease problems this week. If you are growing a variety which is susceptible to black dot, or have had problems with black dot in the past, the 6-8” plant stage is the optimal timing to apply a black dot control product such as a strobilurin (Quadris Top, Gem, Reason, Headline etc).
For up to date information on potato diseases in Idaho and across the country follow us on
twitter. http://www.twitter.com/potatodiseases
Potato Pest Alert for the week ending 6-19-2015
Potato All Locations
Posted on: June 19, 2015 by Phill Wharton
The weather has finally turned and the sun has come out. In most growing areas this week temperatures have been in the 80’s or higher. With the dry warm weather across the snake river valley the risk of a late blight outbreak is low. However, micro-climates may exist in fields where conditions are conducive for late blight. Areas such as low spots where soil moisture is highest and parts of the field shaded by windbreaks are examples of areas where scouting should be intensified. For information on what fungicides to use for managing late blight see the article recently published by Dr. Jeff Miller of Miller Research and Dr. Phill Wharton from UI (http://bit.ly/1Q4tmty).
In the Treasure Valley area and western Idaho most potato crops are now past row closure and the first reports of early blight are starting to come in. For information on early blight control see (http://bit.ly/1CinqBN). Whatever product you use to control early blight it is always recommended that you tank mix it with a protectant fungicide such as Chlorothalonil or Dithane, unless the product already contains it (e.g. Gavel or Zing!). This reduces the chances of fungicide resistance development.
In the Magic Valley area most crops are just at row closure and it is around this time that growers should be making their first application for early blight/ white mold control. Dr. Jeff Miller reports that in fields that didn't receive an insecticide treatment at planting, Colorado beetles are beginning to appear.
In east and north eastern part of the state (Pocatello up through Tetonia) crops are between the 6-8” stage and touching in the rows. There have not been any reports of disease problems this week. If you are growing a variety which is susceptible to black dot, or have had problems with black dot in the past, the 6-8” plant stage is the optimal timing to apply a black dot control product such as a strobilurin (Quadris Top, Gem, Reason, Headline etc).
For up to date information on potato diseases in Idaho and across the country follow us on
twitter. http://www.twitter.com/potatodiseases
Another Lso-positive psyllid found in an Idaho potato field
Potato All Locations
potato psyllids
Posted on: June 19, 2015 by Erik Wenninger
June 19, 2015 – Another Lso-positive psyllid found in a potato field
No psyllids collected last week were positive; however, one of the psyllids collected this week from a Twin Falls County potato field tested positive for Lso, the bacterium that causes zebra chip. A few psyllids collected this week remain to be tested.
Psyllid abundance this week was similar to last week. Potato psyllids were found this week in the following counties: Payette, Canyon, Gooding, Jerome (two fields), and Twin Falls (two fields).
We continue to urge growers and crop consultants to have an IPM program in place and to supplement our monitoring program with their own local monitoring.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields over the season. Updates to these spreadsheets may occur throughout the week as Lso testing results come in.
http://www.uidaho.edu/extension/news/psyllid-management
Another Lso-positive psyllid found in an Idaho potato field
Potato All Locations
potato psyllids
Posted on: June 19, 2015 by Erik Wenninger
June 19, 2015 – Another Lso-positive psyllid found in a potato field
No psyllids collected last week were positive; however, one of the psyllids collected this week from a Twin Falls County potato field tested positive for Lso, the bacterium that causes zebra chip. A few psyllids collected this week remain to be tested.
Psyllid abundance this week was similar to last week. Potato psyllids were found this week in the following counties: Payette, Canyon, Gooding, Jerome (two fields), and Twin Falls (two fields).
We continue to urge growers and crop consultants to have an IPM program in place and to supplement our monitoring program with their own local monitoring.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields over the season. Updates to these spreadsheets may occur throughout the week as Lso testing results come in.
http://www.uidaho.edu/extension/news/psyllid-management
Spotted Wing Drosophila
Tree Fruits Treasure Valley - Idaho
Spotted Wing Drosophila
Posted on: June 15, 2015 by Jim Barbour
We are getting a few spotted wing drosophila from our traps.
Spotted wing drosophila has been showing up in very small numbers from traps in Payette, Canyon and Owyhee County orchards: only one or two flies per trap per week as of June 9. Populations can grow quickly, so frequent monitoring of susceptible crops is advised. See the attached information for biology and management information. Also, check out the helpful link from the PNW Emerging Pests page.
» http://insect.pnwhandbooks.org/pnw-insect-management-handbook/emerging-pest-spotted-wing-drosophila
Spotted Wing Drosophila
Tree Fruits Treasure Valley - Idaho
Spotted Wing Drosophila
Posted on: June 15, 2015 by Jim Barbour
We are getting a few spotted wing drosophila from our traps.
Spotted wing drosophila has been showing up in very small numbers from traps in Payette, Canyon and Owyhee County orchards: only one or two flies per trap per week as of June 9. Populations can grow quickly, so frequent monitoring of susceptible crops is advised. See the attached information for biology and management information. Also, check out the helpful link from the PNW Emerging Pests page.
» http://insect.pnwhandbooks.org/pnw-insect-management-handbook/emerging-pest-spotted-wing-drosophila
Small Grains Field Days this week - Arbon, Rockland and Rupe
Small Grains All Locations
various pests discussed
Posted on: June 14, 2015 by Juliet Marshall
Please feel free to attend the Cereal Field Tours hosted by the University of Idaho on Wednesday and Thursday!
Rockland and Arbon Valley:
The Cereal Field Day in Power County this year will feature variety plots at both Rockland Valley and Arbon Valley locations on Wednesday, June 17th. The Rockland Valley Field Day will begin at 9:30 a.m. at the plot site on Deeg Road. Head South on Rock Creek Road, and take a right on Deeg road. The plots are about ½ mile on the north side. The Arbon Valley Field Day will begin at 2:00 p.m. at the Hayden Farm. The plots are located on Mid Crystal Road near the Hayden home. Please see the attached map for directions.
Dr. Jianli Chen, University of Idaho Wheat Breeder stationed at Aberdeen, will present potential new spring and winter wheat releases. Dr. Juliet Marshall, Extension Crop Management Specialist, will lead a discussion on cereal disease issues that have come up this year.
Growers in attendance will be encouraged to tour the variety plots at each location. Refreshments will be provided by the Power County Wheat Growers Association.
Rupert Minidoka:
We will be touring both Winter and Spring extension variety Trials, starting at 9:30. Meet at the spring variety trial site - 925 E 700 N. Rupert.
Lunch provided - sponsored by Helena Chemical
Contact Joel Packham at:
Joel Packham;(208) 878-9461 or jpackham@uidaho.edu
Small Grains Field Days this week - Arbon, Rockland and Rupe
Small Grains All Locations
various pests discussed
Posted on: June 14, 2015 by Juliet Marshall
Please feel free to attend the Cereal Field Tours hosted by the University of Idaho on Wednesday and Thursday!
Rockland and Arbon Valley:
The Cereal Field Day in Power County this year will feature variety plots at both Rockland Valley and Arbon Valley locations on Wednesday, June 17th. The Rockland Valley Field Day will begin at 9:30 a.m. at the plot site on Deeg Road. Head South on Rock Creek Road, and take a right on Deeg road. The plots are about ½ mile on the north side. The Arbon Valley Field Day will begin at 2:00 p.m. at the Hayden Farm. The plots are located on Mid Crystal Road near the Hayden home. Please see the attached map for directions.
Dr. Jianli Chen, University of Idaho Wheat Breeder stationed at Aberdeen, will present potential new spring and winter wheat releases. Dr. Juliet Marshall, Extension Crop Management Specialist, will lead a discussion on cereal disease issues that have come up this year.
Growers in attendance will be encouraged to tour the variety plots at each location. Refreshments will be provided by the Power County Wheat Growers Association.
Rupert Minidoka:
We will be touring both Winter and Spring extension variety Trials, starting at 9:30. Meet at the spring variety trial site - 925 E 700 N. Rupert.
Lunch provided - sponsored by Helena Chemical
Contact Joel Packham at:
Joel Packham;(208) 878-9461 or jpackham@uidaho.edu
Iris yellow spot in bulb onions
Onion Treasure Valley
IYSV and Onion thrips
Posted on: June 13, 2015 by Stuart Reitz
Iris yellow spot virus was detected in commercial bulb fields in Payette County.
The advanced symptoms (dried necrotic tissue) seen on some infected plants suggests the infection has been present for at least 2 weeks.
The early appearance of virus points out the need for onion growers to be vigilant in their thrips control programs.
Insecticides won't prevent movement of virus-infected thrips into fields, but can help reduce the secondary spread of virus within fields by reducing plant to plant movement of thrips and their reproduction within the crop.
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.
» Developing IYSV lesions on onion (note green islands within necrotic tissue)
Iris yellow spot in bulb onions
Onion Treasure Valley
IYSV and Onion thrips
Posted on: June 13, 2015 by Stuart Reitz
Iris yellow spot virus was detected in commercial bulb fields in Payette County.
The advanced symptoms (dried necrotic tissue) seen on some infected plants suggests the infection has been present for at least 2 weeks.
The early appearance of virus points out the need for onion growers to be vigilant in their thrips control programs.
Insecticides won't prevent movement of virus-infected thrips into fields, but can help reduce the secondary spread of virus within fields by reducing plant to plant movement of thrips and their reproduction within the crop.
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.
» Developing IYSV lesions on onion (note green islands within necrotic tissue)
Potato Pest Alert for the week ending 6-12-2015
Potato All Locations
Posted on: June 12, 2015 by Phill Wharton
Pest Alert for the week ending 6-12-2015
Welcome to the new weekly potato disease update for southern Idaho. For the rest of the growing season we will be posting weekly disease updates from around the potato growing regions in southern Idaho.
Dr. Mike Thornton reports that rows are closed/closing in most fields in the Treasure Valley region so growers are focused on late blight/ early blight/ white mold fungicide applications. There have been reports from across the state of some seed lots with relatively high incidences of PVY. With all the excess rain that we had in May, some growers are reporting problems with Fusarium seed piece decay after planting (see http://bit.ly/1FdrZNw for more information).
With the wet May weeds have been more of a problem this spring and are expected to be a problem as the season progresses. Dr. Pam Hutchinson produced a handy article on how to deal with weeds in your potatoes this year (http://bit.ly/1MPv3pq).
The very mild winter we had has also led to a big problem this year with volunteer potatoes showing up across the state (http://bit.ly/1Thgv6p). Volunteer potatoes can harbor diseases such as late blight and increase the risk of a late blight epidemic. For information on what fungicides to use for managing late blight see the article recently published by Dr. Jeff Miller of Miller Research and Dr. Phill Wharton from UI (http://bit.ly/1Q4tmty).
For up to date information on potato diseases in Idaho and across the country follow us on twitter. http://www.twitter.com/potatodiseases
Potato Pest Alert for the week ending 6-12-2015
Potato All Locations
Posted on: June 12, 2015 by Phill Wharton
Pest Alert for the week ending 6-12-2015
Welcome to the new weekly potato disease update for southern Idaho. For the rest of the growing season we will be posting weekly disease updates from around the potato growing regions in southern Idaho.
Dr. Mike Thornton reports that rows are closed/closing in most fields in the Treasure Valley region so growers are focused on late blight/ early blight/ white mold fungicide applications. There have been reports from across the state of some seed lots with relatively high incidences of PVY. With all the excess rain that we had in May, some growers are reporting problems with Fusarium seed piece decay after planting (see http://bit.ly/1FdrZNw for more information).
With the wet May weeds have been more of a problem this spring and are expected to be a problem as the season progresses. Dr. Pam Hutchinson produced a handy article on how to deal with weeds in your potatoes this year (http://bit.ly/1MPv3pq).
The very mild winter we had has also led to a big problem this year with volunteer potatoes showing up across the state (http://bit.ly/1Thgv6p). Volunteer potatoes can harbor diseases such as late blight and increase the risk of a late blight epidemic. For information on what fungicides to use for managing late blight see the article recently published by Dr. Jeff Miller of Miller Research and Dr. Phill Wharton from UI (http://bit.ly/1Q4tmty).
For up to date information on potato diseases in Idaho and across the country follow us on twitter. http://www.twitter.com/potatodiseases
First Lso-positive psyllid found in a potato field in Idaho
Potato All Locations
potato psyllids
Posted on: June 12, 2015 by Erik Wenninger
One of the psyllids (from Ada County) that we found last week in potato fields tested positive for Lso, the bacterium that causes zebra chip. The remaining psyllids that we collected last week tested negative for Lso.
This week we found more psyllids on sticky traps in potato fields in the following counties: Canyon, Ada, Gooding (two different fields), and Twin Falls (two different fields). In addition, suspected potato psyllids from a field in Owyhee County and an additional field in Canyon County are being shipped to us for confirmation, which should occur on Monday.
Last week, in a partnership with ISDA, we inspected for potato psyllids on tomato and pepper plants at four different retail nurseries in the Twin Falls area and found no psyllids. This week we inspected four different retail nurseries in the Burley area and found one tomato plant with many psyllid nymphs. These are being tested for Lso. The importance of retail nurseries in harboring potato psyllids and Lso remains to be clarified, but this is one possible source of the disease.
We continue to urge growers and crop consultants to have an IPM program in place and to begin local monitoring of fields, especially near the recent findings of Lso-positive psyllids.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields over the season. Updates to these spreadsheets may occur throughout the week as Lso testing results come in.
http://www.uidaho.edu/extension/news/psyllid-management
First Lso-positive psyllid found in a potato field in Idaho
Potato All Locations
potato psyllids
Posted on: June 12, 2015 by Erik Wenninger
One of the psyllids (from Ada County) that we found last week in potato fields tested positive for Lso, the bacterium that causes zebra chip. The remaining psyllids that we collected last week tested negative for Lso.
This week we found more psyllids on sticky traps in potato fields in the following counties: Canyon, Ada, Gooding (two different fields), and Twin Falls (two different fields). In addition, suspected potato psyllids from a field in Owyhee County and an additional field in Canyon County are being shipped to us for confirmation, which should occur on Monday.
Last week, in a partnership with ISDA, we inspected for potato psyllids on tomato and pepper plants at four different retail nurseries in the Twin Falls area and found no psyllids. This week we inspected four different retail nurseries in the Burley area and found one tomato plant with many psyllid nymphs. These are being tested for Lso. The importance of retail nurseries in harboring potato psyllids and Lso remains to be clarified, but this is one possible source of the disease.
We continue to urge growers and crop consultants to have an IPM program in place and to begin local monitoring of fields, especially near the recent findings of Lso-positive psyllids.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields over the season. Updates to these spreadsheets may occur throughout the week as Lso testing results come in.
http://www.uidaho.edu/extension/news/psyllid-management
Potato psyllids found in more potato fields and bittersweet
Potato All Locations
potato psyllids
Posted on: June 5, 2015 by Erik Wenninger
The one potato psyllid that we found in a potato field last week tested negative for Lso, the bacterium that causes zebra chip.
This week we found more potato psyllids in potato fields, including one psyllid on a sticky trap in each of five different fields (three in Canyon County, one in Ada County, and one in Jerome County). We also found one psyllid in a vacuum sample from a different Jerome County field.
From our bittersweet nightshade sites, we found 25 potato psyllids from among three of our sites in Twin Falls County and one psyllid from one of our Ada county sites.
This week, in a partnership with ISDA, we inspected for potato psyllids on tomato and pepper plants at four different retail nurseries in the Twin Falls area. Although we had found potato psyllids in nurseries in previous years, we were unable to find any during this inspection.
We continue to urge growers and crop consultants to have an IPM program in place and to begin local monitoring of fields.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields.
http://www.uidaho.edu/extension/news/psyllid-management
Potato psyllids found in more potato fields and bittersweet
Potato All Locations
potato psyllids
Posted on: June 5, 2015 by Erik Wenninger
The one potato psyllid that we found in a potato field last week tested negative for Lso, the bacterium that causes zebra chip.
This week we found more potato psyllids in potato fields, including one psyllid on a sticky trap in each of five different fields (three in Canyon County, one in Ada County, and one in Jerome County). We also found one psyllid in a vacuum sample from a different Jerome County field.
From our bittersweet nightshade sites, we found 25 potato psyllids from among three of our sites in Twin Falls County and one psyllid from one of our Ada county sites.
This week, in a partnership with ISDA, we inspected for potato psyllids on tomato and pepper plants at four different retail nurseries in the Twin Falls area. Although we had found potato psyllids in nurseries in previous years, we were unable to find any during this inspection.
We continue to urge growers and crop consultants to have an IPM program in place and to begin local monitoring of fields.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields.
http://www.uidaho.edu/extension/news/psyllid-management
Weed tour at Malheur Experiment Station
Announcements Treasure Valley
weeds
Posted on: June 4, 2015 by Jerry Neufeld
Weed tour at Malheur Experiment Station on Thursday, June 11, 2015
Tour Agenda
Pesticide recertification credits for Oregon (2 hrs) and Idaho (3 hrs) will be issued at the conclusion of the tour. This tour is open to the public. Lunch will be served at the conclusion of the tour.
8:30 – 8:50 AM Registration
Session One
9:00 –10:00 AM
Studies for yellow nutsedge control in dry bulb onion; by Joel Felix
This session of the tour will involve walking through three studies that are being conducted to evaluate yellow nutsedge control in direct-seeded onion.
Onion studies: Evaluate the use of Dual Magnum, EPTAM, and Ethofumesate plow down after wheat harvest to control yellow nutsedge in fields intended for direct-seeded onion production. Evaluate herbicide combinations for weed control in onion.
Session two
10:15 – 11:15 AM
Evaluation of herbicides for weed control in potato and corn; by Joel Felix
This session will showcase a study to evaluate different herbicides for weed control in potato. The study includes several herbicide combinations being evaluated for weed control in potato. A corn study to evaluate herbicides registered for weed control in field corn will be showcased.
Session three
11:20 – 12:20 PM
Herbicides for weed control in sugar beet and direct-seeded onion; by Joel Felix
Tour participants will visit two studies to evaluate different registered herbicides for weed control in sugar beet. The treatments are designed to control glyphosate resistant kochia in sugar beet. The session will also showcase two studies to evaluate onion response to various herbicides applied prior and after onion emergence.
Weed tour at Malheur Experiment Station
All Crops Treasure Valley
weeds
Posted on: June 4, 2015 by Jerry Neufeld
Weed tour at Malheur Experiment Station on Thursday, June 11, 2015?
Tour Agenda
Pesticide recertification credits for Oregon (2 hrs) and Idaho (3 hrs) will be issued at the conclusion of the tour. This tour is open to the public. Lunch will be served at the conclusion of the tour.
8:30 – 8:50 AM Registration
Session One
9:00 –10:00 AM
Studies for yellow nutsedge control in dry bulb onion; by Joel Felix
This session of the tour will involve walking through three studies that are being conducted to evaluate yellow nutsedge control in direct-seeded onion.
Onion studies: Evaluate the use of Dual Magnum, EPTAM, and Ethofumesate plow down after wheat harvest to control yellow nutsedge in fields intended for direct-seeded onion production. Evaluate herbicide combinations for weed control in onion.
Session two
10:15 – 11:15 AM
Evaluation of herbicides for weed control in potato and corn; by Joel Felix
This session will showcase a study to evaluate different herbicides for weed control in potato. The study includes several herbicide combinations being evaluated for weed control in potato. A corn study to evaluate herbicides registered for weed control in field corn will be showcased.
Session three
11:20 – 12:20 PM
Herbicides for weed control in sugar beet and direct-seeded onion; by Joel Felix
Tour participants will visit two studies to evaluate different registered herbicides for weed control in sugar beet. The treatments are designed to control glyphosate resistant kochia in sugar beet. The session will also showcase two studies to evaluate onion response to various herbicides applied prior and after onion emergence.
UI Snake River Pest Management Research Tours
All Crops All Locations
Posted on: June 2, 2015 by Don Morishita
Please join us for our annual pest management tours coming up on June 23rd at the UI Kimberly R&E Center and June 24th at the UI Aberdeen R&E Center. Registration for both events begins at 8:00 am and the tour will start at 8:30 am. An industry sponsored lunch will be held at noon at both locations. Below is an agenda for each day. Our contact information also is listed below.
UI Snake River Pest Management Research Tours
Kimberly R&E Center, 3806 N. 3600 E., Kimberly, ID- June 23rd
Aberdeen R&E Center, 1693 S 2700 W Aberdeen, ID- June 24th
Registration begins at 8:00 am
UI Snake River Pest Management Research Tour- Kimberly R&E Center, 6/23/15
8:20 to 8:30
Greetings, introductions and announcements
8:30 to 12:00
Turf-
Field bindweed and other weed management in bluegrass turf with herbicides and fertilizer
Sugar beets-
Effect of tillage and fertility rate on insect and weed management in sugar beet
Soil-active herbicides for weed control in direct seed and strip till sugar beet
Evaluation of chloroacetamide and glyphosate tank mixtures for weed control in sugar beet
Insecticide seed treatment leaf miner study
Beet and root Aphid insecticide trial
Potatoes-
Update on weed management in potato
Colorado potato beetle trials-
ISK and Monsanto
General insecticide trial focused on potato psyllids- PNW Potato Research Consortium
Potato psyllid & zebra chip insecticide trial.
Timing and density of psyllid infection on zebra chip development
Wireworm insecticide trial
Silver scurf, phytosanitary tool for export using CIPC
PVY and other emerging viruses
Zebra chip disease in potato.
Potato variety storage research- varieties from the tri-state potato breeding program.
Cereals-
Wheat insect pest management update in small grains and other crops
Comparison of triallate with other wild oat herbicides for wild oat control and crop safety in spring wheat
Comparison of triallate with broadleaf herbicides for weed control and crop safety in spring wheat
Comparison of herbicides for broadleaf weed control and crop safety in spring wheat
Comparing broadleaf and wild oat herbicides in spring wheat
Dry beans-
Dry bean row spacing, plant growth habit and herbicides for season-long weed control
Preplant and postemergence herbicides for weed control in furrow-irrigated dry bean
Time of day effects on Basagran for weed control in dry bean.
Use of adjuvants with Basagran for weed control in dry bean.
Preemergence and postemergence herbicides for weed control in sprinkler-irrigated dry bean
Field corn-
Weed control in field corn with pre- and postemergence herbicides
Alfalfa-
Alfalfa seed coating for disease management and stand establishment.
Vole damage management in alfalfa.
For more information contact Don Morishita (don@uidaho.edu), at 208.423.6616.
Aberdeen R&E Center Weed Tour
UI Snake River Pest Management Research Tour- Kimberly R&E Center, 6/23/15
8:20 to 8:30
Greetings, introductions and announcements
8:30 to 12:00
Weed control in potato with 2- and 3-way tank mixtures,
Potato variety tolerance to herbicides
Eptam formulations rate and timing
Weed control in Litchi tomato (PCN trap crop).
Updates from Juliet Marshall, Phill Wharton, and Arash Rakesh on disease and insect infestations this year
Cropping systems study- Xi Liang
For more information contact Pam Hutchinson (phutch@uidaho.edu), 208.397.4181.
Potato Pest Update
Potato Treasure Valley
Colorado potato beetle & Potato psyllid
Posted on: June 2, 2015 by Stuart Reitz
1) Dr. Mike Thornton reports that adult Colorado potato beetles are being found on volunteer plants in the Treasure Valley. They have not yet been seen in commercial fields, but this is the time of year that growers should be out actively scouting field edges for insects. This is especially true if fields did not receive an at-planting insecticide application.
2) A single potato psyllid adult was captured on a sticky trap in Malheur County. Potato growers in the Treasure Valley are encouraged to closely monitor their fields. For management information, please see: http://www.uidaho.edu/extension/news/psyllid-management/recommendations or contact your local extension office.
First 2015 potato psyllid found in ID potato field & first 2
Potato All Locations
potato psyllids and ZC
Posted on: May 29, 2015 by Erik Wenninger
We collected our first samples from potato fields this week, and found a potato psyllid on a sticky trap in a field in Twin Falls County. This is the first psyllid we’ve found in a potato field this season and the only one we’ve found in potato so far this week (though we are waiting to receive cards for several sites).
In addition, of the 8 adult psyllids we collected last week from bittersweet nightshade in Twin Falls County, three (one each from three different sites in the canyon) tested positive for Lso, the bacterium that causes zebra chip. This is the first time that we have ever found positive psyllids from our bittersweet nightshade samples.
Given that this is the earliest we have ever found potato psyllids in potato and the first time we have ever found positive psyllids from bittersweet nightshade, we strongly urge growers and crop consultants to have an IPM program in place and to begin local monitoring of fields.
Consult our website for more information, including online spreadsheets that show details of the psyllid captures in potato fields.
http://www.uidaho.edu/extension/news/psyllid-management
Stripe Rust Alert (Wheat) and Spot Form of Net Blotch (Barle
Small Grains All Locations
Stripe rust and Spot Form of Net Blotch
Posted on: May 27, 2015 by Juliet Marshall
Spring and Winter Wheat
1) Stripe rust
Stripe rust is being reported from a widespread area, including northern Utah, western Idaho, southern Idaho (Twin Falls and Burley / Rupert area) and now eastern Idaho (Newdale and Blackfoot).
All reports so far have been in Brundage soft white winter wheat.
Brundage is very susceptible. If you have not be applying fungicides to this variety up to now, I would consider it infected and treat with a triazole fungicide which has some curative activity.
Strobilurin products may have reduced efficacy on stripe rust if the plants are already infected.
The Pre-Harvest Interval (PHI) has been reached in some winter wheat production at which time it is too late to apply fungicides. Always follow label directions.
Spray appropriate fungicides on susceptible spring wheat varieties at herbicide application.
2) BYD
Barley yellow dwarf symptoms are re-occurring in infected fields. Expect to see flag leaves with the typical yellow and red “flags”. For more information, see http://www.uidaho.edu/extension/cereals/scseidaho and click on publications to download the BYD bulletin published by the UI. The heavy rains have really helped to mitigate the damage.
3) RWA
Russian Wheat Aphids are damaging wheat in several areas - look for white (bleached) stripes on tightly curled leaves, and trapped heads which appear similar to frost damaged heads. We are seeing frost damage (which is the likely cause in the picture below) and RWA damage in wheat. RWA will colonize both wheat and barley.
Winter and Spring barley
1) BYD problems may resurface as plants begin to head. Expect to see flag leaves with the typical yellow and red “flags”. For more information, see http://www.uidaho.edu/extension/cereals/scseidaho and click on publications to download the BYD bulletin published by the UI. The heavy rains have really helped to mitigate the damage from the virus.
2) SFNB = Spot Form of Net Blotch is showing in barley fields, especially if the field has second year crops or has infected residue from the previous year. The disease can also survive on grassy weeds and volunteer barley, and be spread by infected seed. Use full strength fungicides for control when spraying herbicides for weed control.
» http://www.uidaho.edu/extension/cereals/scseidaho
