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Plant Disease Diagnostic Service
All Crops Treasure Valley - Idaho
Posted on: June 26, 2015 by Olga Walsh
Plant Disease Diagnostic Service.
As you know, Dr. Krishna Mohan retired from UI this past spring. In order to continue plant disease diagnostic services, we have had to change the submission procedures. Samples will now be processed through the Idaho State Dept. of Agriculture Plant Pathology Lab rather than the Parma Research & Extension Center. Liz Vavricka, Plant Pathologist at the ISDA lab, will serve as the contact and has requested the following protocols for sample submission:
All plant samples should be submitted by extension personnel. Liz would like an email
(Liz.Vavricka(u;agr i.idaho.gov) or DDDI (Distance Diagnostics through Digital
Imaging) (http://www.dddi.org/idahoO notification of the incoming sample. Both emails and DDDI entries should include pictures if possible. Emails should include the information on the attached form. If a diagnosis can be made based on the photo, then no physical sample will be necessary. If a physical san1ple is necessary, it should be sent to ISDA at the address below.
Physical samples sent to ISDA should be dry and placed in a brown paper bag. If roots are included, they should be wrapped with saran wrap and rubber banded. The attached form should be filled out and inserted in the bag or included. Samples should be kept cool (refrigerated if possible) until shipped. Most can be shipped in the regular mail.
Please mark the outside of the shipping container (box or envelope) with a note that says "SAMPLE ENCLOSED" and ship to:
Liz Vavricka
Idaho State Dept. Agriculture
Plant Pathology Lab
2230 Old Penitentiary Rd. Boise, ID 83712
Potato Pest Alert for the week ending 6-26-2015
Potato All Locations
Posted on: June 26, 2015 by Phill Wharton
Dr. Mike Thornton reports that there are not a lot of disease issues coming through the door right now. In the Treasure Valley area, we are seeing a little bit of early blight on lower leaves, especially on plants that are stressed due to virus infection or other issues. Speaking of stress, the hot days and warm nights forecast for the next week or so can be very hard on potato plants. To reduce the incidence of physiological disorders like sugar ends, it is important to adjust irrigation schedules to account for the increase in water demand by the crop. Growers cannot afford to get behind on irrigation under these conditions, as even a single stress event at this critical time of tuber development can cause high levels of malformed tubers and reduce processing quality.
In the Magic Valley area Dr. Nora Olsen reports that the only significant disease issues they are seeing are related to PVY infection of potatoes. The high temperatures in the area also appear to be putting some crops under stress as many which were almost at row closure last week still have not closed rows yet this week.
In east and north eastern part of the state Pocatello up through Tetonia), there have been no disease problems reported apart from some PVY issues. Many crops are at flowering now and should be at row closure in the next week or so. As with other parts of the state hot days and warm nights are forecast for the next couple of days so it is imperative to adjust irrigation schedules to account for the increase in water demand by the crop. Increased stress on the plants can make them more susceptible to disease and insect problems.
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 6-26-2015
Potato All Locations
Posted on: June 26, 2015 by Phill Wharton
Dr. Mike Thornton reports that there are not a lot of disease issues coming through the door right now. In the Treasure Valley area, we are seeing a little bit of early blight on lower leaves, especially on plants that are stressed due to virus infection or other issues. Speaking of stress, the hot days and warm nights forecast for the next week or so can be very hard on potato plants. To reduce the incidence of physiological disorders like sugar ends, it is important to adjust irrigation schedules to account for the increase in water demand by the crop. Growers cannot afford to get behind on irrigation under these conditions, as even a single stress event at this critical time of tuber development can cause high levels of malformed tubers and reduce processing quality.
In the Magic Valley area Dr. Nora Olsen reports that the only significant disease issues they are seeing are related to PVY infection of potatoes. The high temperatures in the area also appear to be putting some crops under stress as many which were almost at row closure last week still have not closed rows yet this week.
In east and north eastern part of the state Pocatello up through Tetonia), there have been no disease problems reported apart from some PVY issues. Many crops are at flowering now and should be at row closure in the next week or so. As with other parts of the state hot days and warm nights are forecast for the next couple of days so it is imperative to adjust irrigation schedules to account for the increase in water demand by the crop. Increased stress on the plants can make them more susceptible to disease and insect problems.
For up to date information on potato diseases in Idaho and across the country follow us on twitter. http://www.twitter.com/potatodiseases
powdery mildew in sugarbeets
All Crops Treasure Valley
powdery mildew
Posted on: June 25, 2015 by Jerry Neufeld
Powdery mildew has been found by Amalgamated Sugar Company Crop Consultant Howard Binford in a sugarbeet field in the Adrian, Oregon area. There are several fungicides available for use to treat powdery mildew, including sulfur dusts. Depending on the disease pressure, 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.
Click on the link below for the powdery mildew page in the PNW Plant Disease handbook.
» http://pnwhandbooks.org/plantdisease/sugar-beet-beta-vulgaris-powdery-mildew
powdery mildew in sugarbeets
All Crops Treasure Valley
powdery mildew
Posted on: June 25, 2015 by Jerry Neufeld
Powdery mildew has been found by Amalgamated Sugar Company Crop Consultant Howard Binford in a sugarbeet field in the Adrian, Oregon area. There are several fungicides available for use to treat powdery mildew, including sulfur dusts. Depending on the disease pressure, 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.
Click on the link below for the powdery mildew page in the PNW Plant Disease handbook.
» http://pnwhandbooks.org/plantdisease/sugar-beet-beta-vulgaris-powdery-mildew
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!
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
