Abstract
Toxicity, repellency, and performance of three insecticides, beta-cyfluthrin EC, fipronil granules, and an essential oil EC formulation, were evaluated against the Asian cockroach, Blattella asahinai Mizukubo, in field and laboratory experiments. The beta-cyfluthrin EC and fipronil granules were significantly more toxic than the essential oil EC formulation under continuous exposure conditions, with LT50 values of 0.014, 0.45, and 11.45 d, respectively. The beta-cyfluthrin EC and fipronil granules were also significantly more toxic than the essential oil EC formulation in an Ebeling choice box test with LT50 values of 0.64, 1.98, and 59.64 d, respectively. Field applications of insecticides at label rates to Asian cockroach populations in Dothan, AL, showed that beta-cyfluthrin EC and fipronil granules reduced populations by 100% at 7 and 30 d after treatment. The essential oil EC formulation initially reduced populations by 68% at 7 d, but control diminished to 2% by 30 d. Results of the field applications and laboratory experiments demonstrate that the beta-cyfluthrin EC and fipronil granules provide excellent control of Asian cockroach populations.
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