Bioactivity of the Postemergent Herbicides Acifluorfen and Bentazon on Geocoris punctipes (Say) (Hemiptera: Lygaeidae)1

Abstract

Adult Geocoris punctipes (Say) caged for 24 h on soybean, Glycine max (L.) Merrill, treated with acitluorfen or bentazon deposited more viable eggs when exposed to the plants treated with herbicide than to untreated plants over a 20-day post treatment period. Adults of known age (1 to 3 days) exposed to the herbicides in greenhouse studies showed no effects on egg viability, whereas adults of mixed ages exhibited increased egg viability when exposed to the herbicides in the field. The two post emergence herbicides had no effect on mortality of adults.