Il Field Crop exam correctly answered graded A+ 2024/2025

Il Field Crop exam number of pests that should be controlled to prevent economic damage form occurring - correct answer economic threshold- action threshold list several economic thresholds for some insect pests - correct answer number of insects per plant % defoliation insects per feet of row Cornroot worms - correct answer larvae tunnel in the roots and cause lodging adults eat silks signs of corn rootworms - correct answer silks clipped 1/2 inch from tip of ear window feeding can clip leaves off entirely what are favorable factors for corn rootworms - correct answer crop debris winter annuals late planting Larval European corn borer - correct answer damage signs from European corn borer - correct answer window feeding bores into stems feeding on ears what damage do corn leaf aphids cause - correct answer "honeydew" coat the tassel and silks and reduce pollination