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Western corn rootworm

Western corn rootworm. Eggs hatch mid- to late-May Small larvae prune root hairs Large larvae tunnel roots Heavy feeding will reduce root mass Confined to corn after corn Unlike Southern corn rootworm. Southern corn rootworm. Other Factors Affecting Abundance. Moist Soil

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Western corn rootworm

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  1. Western corn rootworm • Eggs hatch mid- to late-May • Small larvae prune root hairs • Large larvae tunnel roots • Heavy feeding will reduce root mass • Confined to corn after corn • Unlike Southern corn rootworm Southern corn rootworm

  2. Other Factors Affecting Abundance • Moist Soil • Reduced tillage • High historical pest pressure • High litter/mulch levels • Routine manure applications Rotation is the most useful management tactic for Western Corn Rootworm

  3. Why Rotate From Corn? Adults eat silk, pollen and foliage, then mate Adults lay eggs in soil during the summer/fall Larvae hatch mid- to late-May Pupate during June Must feed on corn to survive

  4. Alternatives to Rotation Source: IPM Corn Insect, Disease, Nematode and Weed Control Recommendations for 2010 Alabama Cooperative Extension Center

  5. Alternatives to Rotation Source: IPM Corn Insect, Disease, Nematode and Weed Control Recommendations for 2010 Alabama Cooperative Extension Center

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