Effect of imidicloprid seed treatment and planting time applications of insecticides on chinch bug (Hemiptera: Lygaeidae) and resulting yields of sorghum

摘要

Imidicloprid seed treatment was compared with standard soil-applied insecticides for chinch bug (Blissus leucopterous leucopterous Say) control on seedling sorghum (Sorghum bicolor L.) to determine the usefulness of this new seed treatment in Kansas where the chinch bug is a primary pest of sorghum. Seeds of treated and untreated sorghum were planted over a 6-yr period in plots at various locations in eastern Kansas where chinch bugs move from maturing wheat or barley into seedling sorghum. During all years and tests, the imidicloprid treatment (2.5g AI/kg of seed) compared favorably with carbofuran applied as a granule or liquid or with aldicarb applied as a granule in-furrow in controlling chinch bugs and protecting sorghum yields. Thus, the imidicloprid seed treatment gives growers another option to reduce losses from chinch bugs.