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Psyllid captures tick up, no new Lso – 28 August 2025 update
Potato All Locations
potato psyllid
Posted on: August 28, 2025 by Tasha Stanzak
• This week we received traps from 31 fields that we are monitoring.
• We captured a total of 43 psyllids across 14 fields.
• Captures were from Canyon, Gooding, and Twin Falls counties.
• Among the 14 psyllids captured last week, none tested positive for Lso.
Psyllid captures ticked up this week in both the Magic and Treasure valleys. This is not entirely surprising given that psyllid abundance very often spikes during August, though captures had been tracking much lower over the past several weeks. Thankfully all the psyllids from last week tested negative for Lso. Some fields have undergone vine kill and will no longer be monitored. Early harvest also limited person-power for trap retrieval from some sites, so those traps will be retrieved next week. We encourage you to maintain your IPM programs, especially in areas that have had higher captures of Lso-positive psyllids this season.
More information on management of potato psyllids and ZC can be found here:
https://www.uidaho.edu/cals/potatoes/pest-management/psyllid-management
To view the weekly data by site in the old spreadsheet format: https://tinyurl.com/potatopsyllid
Please visit the Idaho Pest Monitoring Dashboard, for graphical summaries of our psyllid captures from 2020 through 2025 and an archive of this year’s weekly updates as the season progresses: https://idahopestmonitoring.org/
Psyllid captures still low, Lso still present – 21 August 2025 update
Potato All Locations
potato psyllid
Posted on: August 21, 2025 by Tasha Stanzak
• This week we received traps from all 48 fields that we are monitoring.
• We captured a total of 14 psyllids across 8 fields.
• Captures were from Owyhee, Canyon, Gooding, Jerome, and Twin Falls counties.
• Among the 12 psyllids captured last week, 1 tested positive for Lso.
Psyllid captures this week remained quite low, and one more Lso-positive psyllid was captured last week. Overall captures this year have been low to modest with relatively high prevalence of Lso. Thankfully the low captures should help to mitigate the potential risk of ZC that may come with high prevalence of Lso. Interestingly, we still have yet to capture a potato psyllid in the Upper Snake region this year. Please maintain your IPM programs, especially in areas with higher captures of Lso-positive psyllids.
More information on management of potato psyllids and ZC can be found here:
https://www.uidaho.edu/cals/potatoes/pest-management/psyllid-management
To view the weekly data by site in the old spreadsheet format: https://tinyurl.com/potatopsyllid
Please visit the Idaho Pest Monitoring Dashboard, for graphical summaries of our psyllid captures from 2020 through 2025 and an archive of this year’s weekly updates as the season progresses: https://idahopestmonitoring.org/
Psyllid captures lessen slightly, Lso is still present– 14 August 2025 update
Potato All Locations
potato psyllid
Posted on: August 14, 2025 by Tasha Stanzak
• This week we received traps from all 48 fields that we are monitoring.
• We captured a total of 12 psyllids across 5 fields.
• Captures were from Payette, Canyon, Twin Falls, and Minidoka counties.
• Among the 24 psyllids captured last week, 2 tested positive for Lso.
Psyllid captures this week ticked down a bit from last week, and two more Lso-positive psyllids were captured last week. Overall captures this year have been modest with relatively high prevalence of Lso. Interestingly, we still have yet to capture a potato psyllid in the Upper Snake region this year. Please maintain your IPM programs, especially in areas with higher captures of Lso-positive psyllids.
More information on management of potato psyllids and ZC can be found here:
https://www.uidaho.edu/cals/potatoes/pest-management/psyllid-management
To view the weekly data by site in the old spreadsheet format: https://tinyurl.com/potatopsyllid
Please visit the Idaho Pest Monitoring Dashboard, for graphical summaries of our psyllid captures from 2020 through 2025 and an archive of this year’s weekly updates as the season progresses: https://idahopestmonitoring.org/
Eastern Idaho Pest Alert
All Crops Eastern Idaho
Posted on: August 13, 2025 by Jemila Chellappa
EASTERN IDAHO PEST ALERT
Serving Counties: Bannock, Bingham, Bonneville, Cassia, Fremont, Jefferson, Madison, Power, and Teton
Date: August 8, 2025 | Volume 6, Issue 13
Disease Spotlight: Fusarium Wilt
Cause: Soil-borne fungus Fusarium oxysporum
Crops Affected: Tomatoes, peppers, cucumbers, melons
Symptoms: Yellowing leaves, wilting, stunted growth, brown vascular tissue
Management: Resistant varieties, crop rotation, soil health, sanitation, biological controls, solarization, and avoiding overwatering.
Fall Tree & Shrub Planting Tips
Why Fall is Ideal: Cooler temps, more rain, and still-warm soil encourage root growth.
Key Practice: Root washing helps correct root deformities in container plants.
Tips: Dig wide (not deep), use native soil, water wisely, mulch properly, stake only if necessary.
Codling Moth Management
Timing: 2nd generation egg hatch in most areas has begun or passed. Continue protection through Sept. 15.
Spray Schedules: Vary by location and fruit damage history (see region-specific table on page 5).
Product Guidance:
Conventional options: Spectracide, Sevin, Malathion, Bonide, etc.
Organic options: Neem oil, Cyd-X, Spinosad, pyrethrin products.
Choose different products for each generation to prevent resistance.
Fireblight Control
When: Monitor symptoms ~2 weeks after full bloom; prune infected wood during dry weather.
Chemical Controls: Copper, lime sulfur, oxytetracycline, Actigard, etc.
Biological Controls: Include Streptomycin, Blossom Protect, Serenade Optimum, Regalia, and others.
Pruning Reminder: Always disinfect tools between cuts.
Upcoming Events
IDAHO HOME GARDEN TIPS:
Aug 12: Deer Proofing Your Yard – Sara Mahdavi @ 7 PM
Aug 19: Late Season Flowers – Andy West @ 7 PM
Aug 26: Dehydrating Your Harvest
Sept 9: Understanding Manures
Sept 23: Freeze Drying Your Harvest
PLANT TALK Q&A:
Ron Patterson & Reed Findlay – Aug 12 & Aug 19 @ 7:30 PM
Contact Info:
University of Idaho Extension – Bonneville County
Position Announcement: Director, Foundation Seed and Parma Station
All Crops All Locations
Foundation Seed Director
Posted on: August 12, 2025 by Juliet Marshall
We have a new position posted for the Foundation Seed Director and invite applicants to http://uidaho.peopleadmin.com/hr/postings/49200 for more information.
Title: Director, Foundation Seed and Parma Station
Department: Idaho Agricultural Experiment Station
Posting Number: SP004976P
Open until filled with a first consideration of 9/14.
Reminder - Miller Research Potato Pest Management Field Day - August 20
Potato All Locations
Posted on: August 12, 2025 by Jeff Miller
Come to the Miller Research Potato Pest Management Field Day on Wednesday, August 20. Registration begins at 8:30 with the field tour going from 9:00 AM to 12:00 PM.
Three ISDA pesticide recertification credits and three CCA IPM credits are available.
The cost to attend is $20 and lunch will be provided.
» https://millerresearch.com/event/2025-miller-research-potato-pest-management-field-day/
Reminder: Parma Field Day
All Crops Treasure Valley, Treasure Valley - Idaho, Eastern Idaho, Magic Valley, Northern Idaho, Treasure Valley Oregon
Posted on: August 11, 2025 by Jemila Chellappa
2025 Field Day at Parma
More Lso-positive psyllids – 7 August 2025 update
Potato All Locations
potato psyllid
Posted on: August 7, 2025 by Erik Wenninger
• This week we received traps from 46 fields that we are monitoring; traps from some fields could not be retrieved due to pesticide spraying.
• We captured a total of 24 psyllids across 9 fields.
• Captures were from Elmore, Gooding, Jerome, and Twin Falls counties.
• Among the 25 psyllids captured last week, 10 tested positive for Lso.
Psyllid captures this week were similar to last week and continue to track with the relatively low captures that we’ve seen over the last three years. However, with 10 more Lso-positive psyllid captures, we are seeing relatively high prevalence of Lso this year. Interestingly, most captures and all Lso-positive psyllids have been from the Magic Valley, with fewer captures in the Treasure Valley and none so far in the Upper Snake region. Please maintain your IPM programs, especially in areas with higher captures of Lso-positive psyllids.
More information on management of potato psyllids and ZC can be found here:
https://www.uidaho.edu/cals/potatoes/pest-management/psyllid-management
To view the weekly data by site in the old spreadsheet format: https://tinyurl.com/potatopsyllid
Please visit the Idaho Pest Monitoring Dashboard, for graphical summaries of our psyllid captures from 2020 through 2025 and an archive of this year’s weekly updates as the season progresses: https://idahopestmonitoring.org/
» https://www.uidaho.edu/cals/potatoes/pest-management/psyllid-management
