Landscape & Garden Alerts

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 73^rd S

Idaho Falls, ID 83404

» Pest_Alert_June_20_GoldenHaired_Flower_Longhorn_Beetle,_raspberry_crown_borer.pdf