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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
Facebook | Instagram
» Pest_Alert_July_11_2025_blister_mites_painted_lady_beetles.pdf
Psyllid captures still low; no new Lso-positives (July 10, 2025)
Potato All Locations
potato psyllid
Posted on: July 10, 2025 by Tasha Stanzak
• This week we received traps from 47 fields that we are monitoring.
• We captured a total of 9 psyllids spread across 8 fields.
• Captures were from the following counties: Payette, Canyon, Jerome, Gooding, and Twin Falls.
• The 3 psyllids captured last week all tested negative for Lso.
• For psyllids captured this week, we expect to have results on Lso incidence next week.
Psyllid captures this week were lower than at this time last year, and more similar to the low captures we observed early in the 2022 and 2023 seasons. With relatively low psyllid captures so far and only one Lso-positive psyllid detected so far, ZC risk appears to be 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/
Malheur Experiment Station Field Day – July 9
All Crops Treasure Valley Oregon
Posted on: July 7, 2025 by Russell Smith-Ollivierre
You're invited to the 2025 Field Day at the Malheur Experiment Station!
Date: Wednesday, July 9
Location: 595 Onion Ave, Ontario, OR 97914
Discover the latest agricultural research with field trials featuring onions, potatoes, sugar beets, wheat, and hemp. You'll also hear updates on the Drip Tape to Diesel Pyrolysis Project.
Schedule:
· 8:30 AM – Registration opens; enjoy complimentary coffee and donuts in the barn
· 12:00 PM – Hosted lunch provided
This event is free and open to the public. RSVPs are appreciated to help plan lunch.
RSVP or for more information: Contact Jan Jones at (541)889-2174 or email janet.jones@oregonstate.edu
Amalgamated Sugar Research Field Day
Sugarbeets All Locations
Posted on: July 3, 2025 by Jeff Miller
The Amalgamated Sugar Research Field Days will be Tuesday, July 8 in Nyssa at the ASC Research Site and Thursday, July 10 at the Hatch Research Farm just south of Declo.
Nyssa Field Day Features:
Rhizoctonia Control
Herbicide Drift Demonstrations
Weed zappers, new chemistries, and drones
Palmer amaranth ID and control
Declo Field Day Features:
Irrigation scheduling and sensors
Thermal drones and data collection
Comparison of fertility programs
Cover crops for sugarbeet
Pesticide credits will be available and a locally catered dinner will be provided along with a raffle and door prizes.
Also, the 3rd annual big beet contest will be held with separate entries for youth and adults.
2025 Potato psyllid monitoring program underway in Idaho
Potato All Locations
potato psyllid
Posted on: July 3, 2025 by Erik Wenninger
The University of Idaho and our crop consultant collaborators across the state are once again monitoring potato psyllids, zebra chip disease (ZC), and liberibacter (Lso), the bacterium associated with ZC. The monitoring program covers commercial potato fields throughout southern Idaho and is funded largely by the Idaho Potato Commission and generous in-kind contributions by our cooperators.
Our official monitoring season began with wide deployment of traps last week and will continue for at least 10 weeks. We have 48 fields across the state this year, using 4 sticky traps per field at all sites.
• This week we received traps from 46 fields that we are monitoring.
• We captured a total of 3 psyllids, one from each of 3 fields.
• Captures were from the following counties: Payette, Jerome, and Twin Falls.
• Before the full monitoring program was underway, we also captured 2 psyllids from the Kimberly Research & Extension Center, one of which tested positive for Lso.
• For psyllids captured this week, we expect to have results on Lso incidence next week.
Psyllid captures this week were lower than at this time last year, and more similar to the low captures we observed early in the 2022 and 2023 seasons. It is not uncommon to see some Lso-positive psyllids early in the season and fewer as the season progresses. Given the low captures of psyllids so far, the single Lso-positive psyllid found does not necessarily represent high ZC risk for 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/
» https://idahopestmonitoring.org/
» https://www.uidaho.edu/cals/potatoes/pest-management/psyllid-management
Miller Research Potato Pest Management Field Day - August 20, 9:00-12:00
Potato All Locations
Posted on: July 3, 2025 by Jeff Miller
Miller Research will be holding its annual potato pest
management field day on Wednesday, August 20 and this year we will be
celebrating our 50th anniversary. The field day will begin at the
Miller Research field research at our main office at 422 E 200 N, Rupert (42.648994
N, 113.585612 W).
The cost to attend is $20 and payment can be made online through
PayPal or at the event. Contact Cheryn Suarez at cheryn@millerresearch.com or
(208) 312-4650 if you have questions.
The presentations will focus on chemical management of
diseases and will highlight research that has been funded by the Pacific Northwest
Potato Research Consortium. ISDA pesticide recertification credits and CCA Pest
Management credits have been requested for this meeting.
Agenda:
9:00 – 9:30 Soil health in potatoes (Year 7 of an ongoing
study, presentation in the shop)
9:30 – 10:00 In-furrow fungicides and seed treatments for
Rhizoctonia management
10:00 – 10:30 Variety susceptibility to powdery scab and
PMTV
10:30 – 11:00 Fungicide programs for foliar disease
management; PCC lime for disease control
11:00 – 11:30 Managing black dot on the foliage and tubers
11:30 – 12:00 Alternatives to metam fumigation for
Verticillium wilt control
Lunch will be provided at the conclusion of the meeting.
» https://millerresearch.com/event/2025-miller-research-potato-pest-management-field-day/
Eastern Idaho Pest Alert Summary June 20, 2025 | Volume 6, Issue 6
All Crops Eastern Idaho, Magic Valley
Eastern Idaho Pest Alert
Posted on: June 27, 2025 by Jemila Chellappa
Eastern Idaho Pest Alert June 20, 2025 | Volume 6, Issue 6
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
Raspberry Crown Borer (Pennisetia marginata)
- Pest Type: Clear-winged moth
- Damage: Larvae bore into crowns/roots, causing cane wilt, stunting, and reduced yield.
- IPM Tips:
- Remove infested canes in late summer/fall
- Eliminate nearby wild brambles
- Encourage plant vigor through irrigation
- Nighttime insecticide sprays can help
Pollinator Spotlight – Golden-Haired Flower Longhorn Beetle
- Species: Lepturobosca chrysocoma
- Role: Beneficial pollinator and wood decomposer
- Habitat: Flowers in meadows and forest edges
- Conservation Tips:
- Plant native wildflowers
- Avoid broad-spectrum insecticides
- Leave some deadwood for larval habitat
Fire Blight in Apples and Pears
- Symptoms: Blackened shoots, “burned” look after bloom
- Management:
- Prune infected shoots on dry days
- Disinfect tools between cuts
- Apply copper or antibiotics before/after rain or dew
- Note: Only spray if blossoms are still open
Codling Moth – 1st & 2nd Generation Spray Timing
- Crops at Risk: Apples, pears
- Egg Hatch Periods:
- June 9–30: Burley, Preston
- June 12–July 3: Idaho Falls, Blackfoot
- July 2: Driggs (2nd gen)
- Backyard & Commercial Tips:
- Use insecticides or oils at night for best control
- Follow region-specific timing tables
- Rotate products between generations
UPCOMING HOME GARDEN TIPS WEBINARS
View full schedule in the attached PDF
More Information Contact:
Lena Allen
Horticulture Secretary
University of Idaho
Bonneville County Extension
208.529.1390
1542 E 73rd S
Idaho Falls, ID 83404
» Pest_Alert_June_20_GoldenHaired_Flower_Longhorn_Beetle,_raspberry_crown_borer.pdf
