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potato psyllid update
Potato All Locations
potato psyllids
Posted on: September 26, 2014 by Erik Wenninger
Most of our fields have now undergone vine kill and are no longer being monitored. The busy harvest season has delayed delivery to our lab of some cards from this week (including those from a few sites in western Idaho that have been trapping the most potato psyllids); those results will be posted as early as possible next week. Among the few remaining sites still being monitored, we did trap one psyllid in Cassia County (the first capture at that site this year) and a few psyllids at two different sites in Canyon County.
In addition, a psyllid that was collected from a Canyon County field on Sept 8 tested positive for liberibacter, the bacterium that causes zebra chip.
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
Pesticide Disposal Program
Announcements All Locations
Posted on: September 25, 2014 by Jerry Neufeld
Click on the pdf below for information about the Idaho State Department of Agriculture’s Fall 2014 Pesticide Disposal Program for several locations across southern Idaho.
potato psyllid and ZC update
Potato All Locations
potato psyllids
Posted on: September 19, 2014 by Erik Wenninger
Potato psyllids continue to be trapped at relatively high rates in just a few fields in Western Idaho (Canyon, Owyhee, and Elmore counties). We also trapped one psyllid in a field in Jerome County this week. None of the psyllids tested from last week was positive for liberibacter (Lso), the bacterium that causes zebra chip. During this busy harvest season, we are still waiting for some cards to come into our lab, so those results will be posted as early as possible next week.
Many of the fields we are monitoring have undergone vine kill. For those fields that have yet to be vine killed, it is important to consider management options for psyllids and zebra chip in order to keep the crop protected until harvest—especially in western Idaho where psyllid numbers have been higher.
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
One more Lso-positive psyllid found in Idaho
Potato All Locations
potato psyllids
Posted on: September 12, 2014 by Erik Wenninger
A potato psyllid collected from a grower’s field in Owyhee County last week tested positive for liberibacter (Lso), the bacterium that causes zebra chip disease. This psyllid was collected on a sticky trap in the same field that trapped an Lso-positive psyllid two weeks before. During this week we trapped an additional eight psyllids (average of two per card) in that same field that will be tested for Lso. We also trapped psyllids in a few other sites in Canyon and Elmore Counties this week. Again, psyllid captures were higher this week in western Idaho than central and eastern Idaho; only one psyllid was found on a sticky trap in the Magic Valley this week (Twin Falls County).
Many of the fields we are monitoring have undergone vine kill. For those fields that have yet to be vine killed, it is important to consider management options for psyllids and zebra chip in order to keep the crop protected until harvest—especially in western Idaho where psyllid numbers have been higher.
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
Idaho Association of Plant Protection
All Crops All Locations
Posted on: September 8, 2014 by Jeff Miller
Dear colleagues,
This is a call for papers for the 2014 annual meeting of the Idaho Association of Plant Protection in Jerome, ID at the Best Western Sawtooth Inn and Suites on Wednesday, November 5 at 1:00 pm to Thursday, November 6 at 12:00 p.m.
Please consider contributing research results, observations, unusual disease occurrences, etc. to the meeting. Please do NOT plan a long, formal presentation. Talks will be limited to 15 minutes with 5 minutes of discussion. A final program will be advertised in late October. Registration begins at 12:30 p.m. on Wednesday and the program will begin at 1:00 p.m. Registration costs $15.00 and can only be made by check or cash. Certified Crop Advisor (CCA) and Pesticide Recertification credits (ISDA) will be available.
Hotel reservations at the Best Western Sawtooth Inn can be made by calling 208-324-9200. Indicate you will be attending the IAPP meetings. Regular rooms are available at the corporate rate of $69.99 + tax, but reservations must be made prior to October 21.
Please reply by email or complete and return the bottom half of the attached sheet. If you are not attending this meeting but would like to be notified of future meetings, please send us your updated contact information.
We would appreciated it if you could circulate the attached memorandum to interested individuals and colleagues who are not in this group.
Thank you and we are looking forward to seeing you in November.
Idaho psyllid monitoring update
Potato All Locations
potato psyllids
Posted on: September 5, 2014 by Erik Wenninger
Potato psyllid captures in our monitoring program were at similar levels to the previous two weeks (i.e., slightly higher than in previous weeks, though still relatively low compared to previous years). Again, most psyllids—nearly all this week—were found in the Treasure Valley (Canyon and Owyhee Counties) or Elmore County. In addition we captured one psyllid at a site in Twin Falls County. Psyllid numbers were the highest we’ve seen yet this year (1.25 or 1.75 on average per card). This is not surprising given the trend of increasing psyllid numbers toward the end of the season that we have observed during the last two years. It is important to consider management options for psyllids and zebra chip in order to keep the crop protected until harvest.
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
Late season late blight management
Potato Eastern Idaho
Late Blight
Posted on: September 4, 2014 by Jeff Miller
As harvest approaches, managing late blight going into storage is critical for growers in areas affected by late blight. Attached is a checklist of steps growers can take to manage late blight at then end of the season and into storage.
ISDA pesticide disposal program
Announcements All Locations
Posted on: September 2, 2014 by Jerry Neufeld
The Idaho State Department of Agriculture will be holding a pesticide disposal program across southern Idaho in the coming days. Click on the pdf below for the schedule.
One more Lso-positive psyllid found in Idaho
Potato All Locations
potato psyllids
Posted on: August 29, 2014 by Erik Wenninger
Potato psyllid captures in our monitoring program slightly increased last week and remained at similar levels this week. Most psyllids during the last two weeks were found in the Treasure Valley (Canyon, Payette, Owyhee Counties) or Elmore County.
In addition, one of the psyllids collected in Owyhee County last week tested positive for Lso (liberibacter; the bacterium that causes zebra chip). This is only the second psyllid that has tested positive so far in the commercial fields we have been monitoring.
We typically observe an increase in psyllid captures at the end of the growing season; however, it is likely that the heavy rains we have experienced recently have affected psyllid numbers. It is important to consider management options for psyllids and zebra chip in order to keep the crop protected until harvest.
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
ISDA Pesticide Disposal Program
All Crops All Locations
Posted on: August 27, 2014 by Jeff Miller
The Idaho State Department of Agriculture will be conducting its Fall Pesticide Disposal program again this fall. Specific information on places and times is available at the attached link.
» http://www.agri.idaho.gov/Categories/Pesticides/Documents/PDP%20Doc/2014PDPFallCollections.pdf
Cercospora leaf spot in sugarbeets
Sugarbeets Magic Valley
Cercospora
Posted on: August 27, 2014 by Jeff Miller
Cercospora leaf spot has been confirmed in a sugarbeet field in Minidoka County. The recent wet weather has been favorable for disease development. The link below directs to an extension bulletin published by the University of Nebraska which discusses disease symptoms and fungicides which can be used for disease management.
Potato Late Blight Continues to Spread
Potato All Locations
Late blight
Posted on: August 22, 2014 by Phil Nolte
Two fields with late blight in Fremont County were confirmed today. There are multiple late blight fields in Madison, Bingham, Bonneville and Power Counties. The current recommendation is if anyone in the affected counties has not applied a protectant fungicide to their potato fields do so immediately. Until vine kill the University of Idaho recommends that potato fields be kept on a 7 day spray schedule. Rain is predicted to continue in all of the current late blight infected counties and rain is very efficient at moving late blight spore around. .
It is essential to protect green, growing vines with fungicide applications. Spores of the late blight pathogen are washed from the foliage into the soil causing tubers to become infected. Sometimes tuber infection can occur with very little foliar late blight. Protecting the foliage of Ranger Russet fields is particularly important because the vines remain green longer and the tubers are highly susceptible to tuber infection.
If late blight is present in your field, we recommend a post-harvest application of a phosphorous acid (phosphite) product going into storage at the rate of 12.8 fl oz/ton applied at a volume of 0.5 gal/ton of potatoes. Ensure you are not over-applying which may add too much water to the harvested potatoes. Potatoes should NOT be shiny wet, but rather barely damp. Apply at a point in the handling process where potatoes are rotating or dropping to ensure the best coverage. These post-harvest products will not cure infected tubers but will protect healthy tubers form becoming infected in storage.
Please bring any suspicious samples in to the University of Idaho or Miller Research for positive identification.
Idaho Psyllid Monitoring Update
Potato All Locations
Potato Psyllids
Posted on: August 22, 2014 by Erik Wenninger
Potato psyllid captures in our monitoring program slightly increased this week in terms of numbers (but remain relatively low compared to previous monitoring years) and locations (Magic and Treasure Valleys). Psyllids were found on sticky traps in commercial potato fields in Owyhee, Canyon, Ada, Elmore, and Twin Falls Counties.
None of the psyllids found so far in commercial fields (except for one on Canyon County during mid-July) has tested positive for Lso (liberibacter; the bacterium that causes zebra chip).
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
Late blight in Idaho
Potato All Locations
Late blight
Posted on: August 20, 2014 by Phil Nolte
An additional potato field in Madison County has been confirmed with late blight.
Previously, late blight had been confirmed in Power County, Bonneville County, and Bingham County. The current recommendation from the University of Idaho is for everyone to apply a protectant fungicide immediately. The rain showers we have been experiencing lately provide perfect conditions for late blight to spread. Please remember that late blight also has the ability to infect tubers growing in the ground as spores move from the plants into the soil. Stay on a 7 day spray schedule and continue to scout fields carefully. Please bring any suspicious samples in to the University of Idaho or Miller Research for positive identification.
Sprout damage in grain
All Crops All Locations
Rain at Harvest
Posted on: August 19, 2014 by Juliet Marshall
Guidance to Idaho malting barley producers experiencing higher than acceptable sprout damage in their 2014 malting barley crop
Growers are urged to be patient and not panic as they try to complete their 2014 growing season. We recommend producers follow these steps:
1. Follow best management harvesting practices, particularly avoid harvesting lodged barley. Beware that injured by sprout barley is more fragile and more susceptible to skinned and broken kernels.
2. Quickly harvest the remaining grain to prevent growth of molds. Sooty molds will increase off flavors in malt and reduce suitability for feed.
3. Store your barley with good aeration. Grain is stored best if it is cool, dry and clean. The recommended maximum moisture content for storage of clean sound barley during warm summer temperatures is 12%. Barley can be stored at slightly higher moisture content if it is kept cool.
4. Take a good bin sample as your put your barley into storage and work with your malting barley company to have the barley tested for injured by sprout.
5. Be patient and give your malting company time to determine what portion of your crop can be used as malting.
6. Try to avoid dumping your barley as feed at harvest as the commercial feed barley prices have been dropping rapidly.
Your malting companies are going to extraordinary lengths to test Idaho malting barley that has been injured by sprout and to determine how much can be used for malting. They are researching and micro malting samples to determine the highest limit of sprout damage they can take without compromising the malting and brewing process.
It is important to understand why sprout damage poses a risk in the brewing process. Pre-harvest sprouting (PHS) or pre-germination impacts the ability of barley to germinate. Problems can range from a slow loss of germinative energy or capacity over time in storage to the complete loss of germination at the time of harvest. Barley used for malting must exhibit vigorous and uniform germination. In malting, pre-harvest sprouted barley can lead to poorly modified malt that is unsuitable for the production of beer. Low extract yields, poor beer stability and off-flavors are just a few of the problems that can result from PHS damaged barley.
Barley kernels remain resistant to sprouting prior to physiological maturity. Some varieties maintain a level of resistance (dormancy) for a significant time after harvest. Certain conditions like heavy rainfall at maturity can reduce this level of resistance to germination.
The bottom line is that barley with sprout damage, even if it germinates well after harvest, can lose germination rapidly in storage. There are no tests that can predict when a sudden drop in germination will occur. Even if a relatively high degree of germination remains in a lot of barley, the germination may be uneven with some kernels germinating much slower than others in that lot resulting in a malt that does not meet brewers minimum specifications for beer production.
Full documents at: http://www.uidaho.edu/extension/cereals/scseidaho
For more information, please contact Kelly Olson, Idaho Barley Commission Boise office 208-334-2090, cell 208-409-9165 or our Idaho Falls satellite office, cell 208-569-6957. Dr. Juliet Marshall, University of Idaho, Idaho Falls, 208-529-8376, cell 208-390-4859.
Additional confirmed late blight fields
Potato All Locations
Late blight
Posted on: August 15, 2014 by Nora Olsen
Late blight has been positively confirmed in Idaho. Today one field has been confirmed in Power County and one field in Bonneville County. There are a total of three confirmed late blight fields in Bingham County. The current recommendation from the University of Idaho is for everyone to apply a protectant fungicide immediately. The rain showers we have been experiencing lately provide perfect conditions for late blight to spread. Please remember that late blight also has the ability to infect tubers growing in the ground as spores move from the plants into the soil. A quick reminder, tomatoes in home gardens are also susceptible to late blight infections. Stay on a 7 day spray schedule and continue to scout fields carefully. Please bring any suspicious samples in to the University of Idaho for positive identification.
potato psyllid update
Potato All Locations
potato psyllids
Posted on: August 15, 2014 by Erik Wenninger
Potato psyllid captures in our monitoring program were similar to recent weeks in terms of numbers (relatively low) and locations (Magic and Treasure Valleys). Psyllids were found on sticky traps in commercial potato fields in Canyon, Ada, Jerome, and Twin Falls Counties. This represents the first potato psyllid captured in Ada County in our monitoring network this year. We also captured four psyllids in vacuum samples at bittersweet nightshade sites in Twin Falls County.
None of the psyllids found so far in commercial fields (except for one on Canyon County during mid-July) has tested positive for Lso (liberibacter; the bacterium that causes zebra chip).
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
Malheur Experiment Station Onion Variety Day
Onion Treasure Valley
Posted on: August 15, 2014 by Stuart Reitz
You are invited to the Malheur Experiment Station Onion Variety Day presented by the OSU Malheur Experiment Station. The Variety day will be Tuesday August 26, 2014 from 9 AM to 1 PM.
At 10 AM there will be an overview of research trials related to E. coli bacteria in irrigation water and the Food Safety Modernization Act (FSMA).
Complimentary lunch will be served. Please reserve lunch by calling Janet Jones at the Malheur Experiment Station, 595 Onion Ave., Ontario OR 97914, (541) 889-2174.
Farming with Pollinators and Beneficial Insects Field Day
All Crops All Locations
Posted on: August 14, 2014 by Jennifer Miller
For Immediate Release
August 14, 2014
Contact:
Jennifer Miller, 208-850-6504, Northwest Center for Alternatives to Pesticides
Farming with Pollinators and Beneficial Insects Field Day
The Northwest Center for Alternatives to Pesticides invites farmers interested in increasing pollinator and beneficial insect habitat on their farms to attend a Wednesday, September 3 field day.
Clay and Josie Erskine of Peaceful Belly Farm, located in the Dry Creek Valley north of Boise, will host the field day from 9 am – 12:30 pm.
The Erskines will show how they have incorporated pollinator and beneficial insect habitat on their farm by planting willows in a riparian area, native bunch grasses and clover on farm roads, perennials into a hedgerow, and the management of successive plantings of brassicas to flowering.
Jessa Kay Cruz, senior pollinator conservation specialist with the Xerces Society, will present her work with farmers to establish habitat for pollinators and beneficial insects in irrigated cropping systems. She will cover how to assess existing habitat and identify areas to improve, year-round beneficial insect and pollinator habitat requirements, and certified organic methods of site prep for establishing habitat.
Copies of the Xerces Society’s new book Farming with Native Beneficial Insects: Ecological Pest Control Solutions will be available to review or purchase.
The field day will conclude with a farm lunch and discussion of funding opportunities, including a new microloan program through Farm Service Agency and conservation funding through Natural Resources Conservation Service.
The cost is $15 and pre-registration is required. Register online at www.pesticide.org or contact Jen Miller (jmiller@pesticide.org or 208-850-6504) by August 27. Details at www.pesticide.org.
This tour is made possible by support from USDA Natural Resources Conservation Service Conservation Innovation Grant, USDA Risk Management Agency Education partnership funding, and University of Idaho Canyon County. This is an equal opportunity event.
Late blight in potatoes - Bingham County
Potato All Locations
Late blight
Posted on: August 12, 2014 by Phil Nolte
Late blight has been positively confirmed in Idaho. Today a potato leaf sample was brought into the University of Idaho for identification with sporulating lesions. The sample was from Bingham County. The current recommendation from the University of Idaho is to apply a protectant fungicide immediately. With more rain in the forecast for the rest of the week in this area it is important to spray and scout field thoroughly for symptoms. Please bring any suspicious samples in to the University of Idaho for positive identification.
corn earworm
Corn Treasure Valley
earworm
Posted on: August 12, 2014 by Jerry Neufeld
Here is my count of corn earworm moths as of this morning.
Location 7/23 7/29 4-Aug 12-Aug
caldwell area 0 0 0 0
melba area 0 0 0 0
north of lake lowell 0 0 0 7
west of greenleaf 0 0 0 8
east of wilder 0 0 0 3
west of wilder 0 0 0 0
north of homedale 0 0 0 1
0 0 0 19
Idaho psyllid monitoring update
Potato All Locations
potato psyllids
Posted on: August 8, 2014 by Erik Wenninger
Relatively few potato psyllids were captured in our monitoring program this week overall, and, similar to recent weeks, most psyllids captured were found in the Magic Valley. Of these, most were found in fields in Twin Falls County, though we did find two psyllids in a field in Minidoka County this week (the first finds this year in this county). In addition, we found a psyllid in Canyon County and, for the first time this year, in Payette County.
None of the psyllids found so far in commercial fields (except for one on Canyon County during mid-July) has tested positive for Lso (liberibacter; the bacterium that causes zebra chip).
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
glyphosate-resistant kochia
Sugarbeets Treasure Valley
kochia
Posted on: August 4, 2014 by Jerry Neufeld
This is an update to the alert that was posted on June 11, 2014 regarding the suspected glyphosate-resistant kochia plants in Western Idaho and Eastern Oregon sugar beet fields. It has now been confirmed that the plants that escaped control in at least two fields in Eastern Oregon were indeed resistant to glyphosate. Tests done by the weed laboratory staff at Colorado State University in Fort Collins, CO confirmed the resistance. Kochia weed seeds will be collected from different fields at the end of the season in order to determine the distribution of glyphosate-resistant kochia in the region.
In the meantime, we would encourage growers to physically remove kochia plants that escaped control in sugar beet fields (if at all possible) in order to minimize the buildup of glyphosate-resistant seeds in the soil. Also, please report any suspicious kochia escapes to your local crop consultant, crop advisor, extension educators, Joel Felix (OSU weed scientist), or Don Morishita (UI weed scientist).
Submitted by Joel Felix, Malheur Experiment Station/Oregon State University, 595 Onion Ave, Ontario, OR 97914
corn earworm
Corn Treasure Valley
earworm
Posted on: August 4, 2014 by Jerry Neufeld
I still have not found any adult corn earworm moths in the traps I set out. They are being checked once a week.
Weekly Corn Earwom Counts, 2014
Date
Location 7/23 7/29 4-Aug
caldwell area 0 0 0
melba area 0 0 0
north of lake lowell 0 0 0
west of greenleaf 0 0 0
east of wilder 0 0 0
west of wilder 0 0 0
north of homedale 0 0 0
potato psyllid update
Potato All Locations
potato psyllids
Posted on: August 1, 2014 by Erik Wenninger
Few potato psyllids were captured in our monitoring program this week overall, and psyllids were found this week only in Twin Falls County (however, results from several Treasure Valley sites have not yet been returned to us). One of these was a nymph, found in a vacuum sample from a commercial field; this is the first nymph found this summer in our monitoring program. In addition to the few psyllids found in our network of commercial potato fields, we also found four psyllids on yellow sticky cards near bittersweet nightshade sites in Twin Falls County, and several potato psyllids on sticky cards and in vacuum samples taken from insecticide trials at the Kimberly R&E Center. Nearly all of the Idaho Potato Team has been at the Potato Association of America meetings in Spokane this week. We regret the delay this has caused in testing psyllids for Lso (liberibacter; the bacterium that causes zebra chip). Samples are currently being processed and we expect to post results to the spreadsheets below by early next week.
Detailed results for the “intense” fields, which are monitored with 10 sticky traps, vacuum samples, and leaf samples are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdG15WTNRMkEteHRWRGhpM2ltSXBiR3c#gid=0
Detailed results for the “light” fields, which are monitored with 4 sticky traps are here:
https://docs.google.com/spreadsheet/ccc?key=0AuZRwfbNUs2YdGVrX2t2NGs0YzlYYUZaQkNaejhES2c#gid=0
More information and resources on potato psyllids and zebra chip, including management and scouting recommendations, can be found at the link below.
http://extension.uidaho.edu/kimberly/tag/potato-psyllid-and-zebra-chip/
