ABSTRACT

A study was conducted in Imperial Valley, CA to evaluate insecticides for control of silverleaf whitefly, Bemisia argentifolii Bellows and Perring, in cotton. New insecticidal compounds, Oberon (spiromesifen) under development of Bayer Crop Science to control various insects and mites on corn, cotton, vegetables, fruit crops, and ornamentals, Calypso (thiacloprid) a chloronicotinyl (CNI) chemistry, pioneered by Bayer CropScience, Diamond (novaluron) a Benzoylphenyl urea compound under development by Crompton Corporation, XR-225 (gamma-cyhalothrin) a pyrethroid insecticide under development by Dow AgroSciences, and F0570 (zeta-cypermethrin) a pyrethroid insecticide under development of FMC Corporation, were compared to standard whitefly insecticides Assail (acetamiprid) a Cerexagri neonicotinoid insecticide, Danitol (fenpropathrin) a Valent BioSciences pyrethroid insecticide, and Warrior (lambda cyhalothrin) a Syngenta pyrethroid insecticide, for control efficacy of silverleaf whitefly adults and nymphs. All pyrethroid insecticides were applied in tank mixtures with Orthene (acephate) a Valent BioSciences organophosphate insecticide. The whitefly adult and nymphal post-treatment means for the pyrethroid insecticide treatments (gamma-cyhalothrin and zeta cypermethrin) and were not different from the untreated control. Assail, Calypso, and Oberon treatments provided the highest levels of control for silverleaf whitefly adults and nymphs.