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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

lallen@uidaho.edu

1542 E 73rd S

Idaho Falls, ID 83404

 

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