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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
University of Idaho Field Days - August 14 and August 21
All Crops All Locations
General Announcement related to Agriculture
Posted on: August 5, 2025 by Kasia Duellman
Please mark your calendars for 2 upcoming University of Idaho Field Days:
August 14: Parma Field Day - Parma Research and Extension Center, 29603 U of I Lane, Parma Idaho
- Registration is FREE and begins at 7:15 AM, with FREE breakfast
- Tour begins at 8:00 AM and concludes at 11:30 AM
- 1 ISDA credit, 2 ODA credits, 2 CCA/CCU IPM credits
- For more information, contact Dr. James Woodhall (jwoodhall@uidaho.edu) or Dr. Armando Falcon-Brindis (afalconbrindis@uidaho.edu)
August 21: Aberdeen Potato IPM Field Day - Aberdeen Research and Extension Center, 1693 S 2700 W, Aberdeen Idaho
- Not just potatoes - topics also cover small grains, mustards, and more
- Registration is FREE and begins at 8:30 AM
- Tour begins at 9:00 AM and concludes at Noon, with a FREE box lunch
- 2 ISDA credits, and CCA/CCU credits will also be available
- For more information, contact Dr. Kasia Duellman (kduellman@uidaho.edu)
Psyllid captures slightly lower than last week – 31 July 2025 update
Potato All Locations
potato psyllid
Posted on: July 31, 2025 by Erik Wenninger
• This week we received traps from 39 fields that we are monitoring; traps from several Treasure Valley fields will be picked up next week because of the Potato Association of America meeting this week.
• We captured a total of 25 psyllids across 8 fields.
• Captures were from Gooding and Twin Falls counties.
• Among the 38 psyllids captured last week, 4 tested positive for Lso; all positives were from the Magic Valley.
Psyllid captures this week were slightly lower than last week and similar to the moderately low captures we saw during this period in the last three seasons. Although we captured a few Lso-positive psyllids last week, the modest overall captures should mitigate ZC risk. We saw similar patterns last year (i.e., relatively low captures with several Lso detections in July to August) and ZC did not turn out to be a big problem.
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/
Water Storage Options in Eastern Idaho
All Crops Eastern Idaho
Posted on: July 28, 2025 by Juliet Marshall
The seminar will feature a keynote address by Senator Cook (30th District), a forecast for the groundwater-surface water agreement, presentations on and drone footage of water storage alternatives, and an expert panel discussion on the alternatives presented to answer your questions. Alternatives to increase storage include: Teton Dam, Ashton Dam, Lane Lake, Jackson Dam, Minidoka Dam, and Mud Lake. This year’s gathering is co-hosted with the Henry’s Fork Watershed Council, with sponsorship from the Bingham Groundwater District and the Snake River Headwaters Watershed Group.
Water Storage Options in Eastern Idaho
Date: Tuesday, August 19 from 8:30am–2:30pm (lunch provided)
Location: Romance Theater, 2 E Main St, Rexburg ID
We are currently investigating options for livestream, but cannot guarantee a live virtual format. Please prioritize in-person attendance.
RSVP required. Visit tinyurl.com/wateridaho. This will help us get an accurate estimate for lunch, catered by Blisters BBQ.
The agenda and meeting flyer are attached. Please circulate with those who might be interested. Please contact either Keith, Dean Mortimer, or Brad Buttars if your organization is interested in helping sponsor this important event.
Please don't hesitate to be in touch with questions. Hope to see you there!
Thank you,
Roger Warner, President
Keith Esplin, Executive Director
208.243.1824
Psyllid captures increase – 24 July 2025 update
Potato All Locations
potato psyllid
Posted on: July 24, 2025 by Tasha Stanzak
• This week we received traps from 48 fields that we are monitoring.
• We captured a total of 38 psyllids across 13 fields.
• Captures were from the following counties: Payette, Canyon, Jerome, Gooding, and Twin Falls.
• Among the 13 psyllids captured last week, none tested positive for Lso.
Psyllid captures this week ticked up from last week and were slightly above what we have seen during this period in the last three seasons. This is not entirely surprising given the high temperatures, and captures are still not anywhere near our highest capture years. ZC risk still appears to be fairly low this year.
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/
UI Cereals Extension Variety Trials - the last week
All Crops Eastern Idaho
Posted on: July 21, 2025 by Juliet Marshall
Please see the attached PDF for the directions / addresses to the last two field days for the UI Cereals Extension Program.
Soda Spring tomorrow (Tuesday July 22) starting at 10 AM at the winter trials, and then the spring trials.
For the Wednesday Field Day (July 23) , it will be at the Tetonia R&E Center on station, starting at 10 AM.
Cheers!
Juliet
Psyllid captures still low; one Lso-positive psyllid from last week – 17 July 2025 update
Potato All Locations
potato psyllid
Posted on: July 17, 2025 by Erik Wenninger
• This week we received traps from 48 fields that we are monitoring.
• We captured a total of 13 psyllids across 5 fields.
• Captures were from the following counties: Payette, Jerome, Gooding, and Twin Falls.
• Among the 9 psyllids captured last week, 1 tested positive for Lso.
Psyllid captures this week were similar to the relatively low captures during this period in the last 2-3 seasons. With relatively low psyllid captures and only two Lso-positive psyllids detected so far, ZC risk appears to be relatively low this year. That could change as the season progresses and temperatures rise, so stay tuned.
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/
UI Extension Cereal Variety Trial Field Days
All Crops Eastern Idaho
Posted on: July 17, 2025 by Juliet Marshall
Join us tomorrow w for the Idaho Falls field day to look at the spring wheat and barley variety trials. About one half mile north of
2550 S 45th W
Idaho Falls ID 83402
On the west side of the road.
Next week, we will be in Soda Springs, starting 10 AM at the winter dryland trials then to the spring trials on Tuesday morning. On Wednesday morning, we will be at the Tetonia R&E Center, again starting at 10 AM.
Hope you can join us!
Eastern Idaho Pest Alert - July 11, 2025 | Volume 6, Issue 9
All Crops Eastern Idaho, Magic Valley
Posted on: July 16, 2025 by Jemila Chellappa
Eastern Idaho Pest Alert - July 11, 2025 | Volume 6, Issue 9
Coverage: Bannock, Bingham, Bonneville, Cassia, Fremont, Jefferson, Madison, Power, and Teton Counties
Prepared by: University of Idaho Extension, Bonneville County
Editor: Ron Patterson
Featured Pest Alerts
Blister Mites (Phytoptus pyri, Eriophyes mali)
Host Crops: Apples, Pears
Symptoms: Brown, blister-like galls on upper leaf surfaces; stunted growth and early leaf drop in heavy infestations
IPM Tips:
- Apply dormant oil sprays in late winter
- Monitor with a hand lens during early spring bud break
- Use sulfur dust or miticides post-bloom as needed
- Encourage predatory mites and avoid broad-spectrum insecticides
Pollinator & Predator Spotlight – Painted Lady Beetle (Mulsantina picta)
Benefits: Natural predator of aphids, mites, and soft-bodied pests
Habitat: Conifers, meadows, and gardens
Conservation Tips:
- Include native flowering plants and conifers
- Leave mulch, bark, and leaf litter undisturbed for overwintering
- Refrain from using broad-spectrum pesticides
Codling Moth (Cydia pomonella)
Current Stage: First and second generation overlap ongoing
Spray Guidance:
- High-pressure sites: Follow Option A (insecticide) or Option B (oil + insecticide) and repeat every 14–18 days
- Low-pressure sites: Begin at first egg hatch and adjust timing based on trap data
- Backyard Options: Use products like Spinosad, Malathion, or codling moth virus (Cyd-X) based on label rates
Note: See full tables (pgs. 6–7) for region-specific spray dates from Burley to Driggs
Fire Blight (Erwinia amylovora)
Symptoms: Blackened shoots resembling fire scorch; visible two weeks post-bloom
Management Tips:
- Prune on dry days and disinfect tools between cuts
- Apply protectants or resistance inducers during bloom (e.g., Actigard, Regalia)
- Apply biologicals (e.g., Blossom Protect, Serenade) at bloom or post-bloom
Backyard Note: If no blooms are present, focus on sanitation and pruning
Webinars & Upcoming Events
- July 22 – Chip Bud Grafting Fruit Trees – Bracken Henderson (7:30 PM MT)
- July 24 – Plant Talk Q&A – Ron Patterson & Reed Findlay (7:30 PM MT)
- August 12 – Deer Proofing Your Yard – Sara Mahdavi (7:00 PM MT)
- August 26 – Dehydrating Your Harvest
- Sept 9 – Understanding Manures
- Sept 23 – Freeze Drying Your Harvest
Zoom Link: https://uidaho.zoom.us/j/92616335377
More Information: Check the Attached PDF
Contact:
Lena Allen
Horticulture Secretary
University of Idaho Extension – Bonneville County
1542 E 73rd S, Idaho Falls, ID 83404
(208) 529-1390
bonneville@uidaho.edu
uidaho.edu/extension/county/bonneville
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» Pest_Alert_July_11_2025_blister_mites_painted_lady_beetles.pdf
