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Red Sunflower Seed Weevil High (08/16/18)

Continue to scout for red sunflower seed weevil.

Red Sunflower Seed Weevil High

Continue to scout for red sunflower seed weevil. The majority of sunflowers are blooming, >90% (Source: USDA NASS North Dakota Crop, Livestock & Weather Report - August 13, 2018). Hot weather has pushed many sunflower pass the susceptible crop stage, R5.7 (70% of the face of sunflower head with florets), for egg laying by female red sunflower seed weevils. Hot spots for seed weevil are in southwestern, north central and south central ND (Source: ND IPM Survey Program). See the past issue in Crop & Pest Report from July 26, 2018 for scouting/threshold information.

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Janet J. Knodel

Extension Entomologist

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