Sublethal Impacts of Novaluron on Tarnished Plant Bug (Hemiptera: Miridae) Adults

Abstract Tarnished plant bug, Lygus lineolaris Palisot de Beauvois (Hemiptera: Miridae), has become a primary pest of cotton in the Midsouthern United States. Insect growth regulators such as novaluron are an important part L. management. While is lethal to nymphs, it does not kill adults, so been used when nymphs stage present. However, yield protection was observed from application adults were predominant To explain this, series studies conducted examine sublethal impacts adults. Novaluron ingestion by reduced hatch rate and sometimes oviposition rate. Ingestion either males or females rates, but reduction greater female exposure. Contact exposure with residues within 1 d about 50%, impact on inconsistent. A field study showed contact mixed-age natural populations, overall net reproductive reduced. Surface eggs did reduce Overall, tarnished bug novaluron, regardless adult age route, egg viability. varied route. This understanding addition should be considered choosing times maximize effects populations.