ABSTRACT

An adult vial test (AVT) was used to determine the toxicity of acephate 97 (Orthene®) and technical cyfluthrin (Baythroid®) and dicrotophos (Bidrin®) to southern green stink bug, Nezara virudula adults, captured in the blacklight traps in the fall of 2002 in the Brazos River Valley, Texas. LC50 values (95% CL) at 24 h for acephate and cyfluthrin were 4.2312 (3.1352-4.9254) and 0.0443 (0.0311-0.0582) µg/vial, respectively. These values were significantly different. A statistically significant probit analysis model for dicrotophos was not developed because of highly variable mortality data. These data are discussed and possible explanations are presented relative to previously published reports.