Bemisia tabaci (Genn.) was considered a secondary pest in Brazil until 1990, despite being an efficient geminivirus vector in beans and soybean. In 1991, a new biotype, known as B. tabaci B biotype (=B. argentifolii) was detected attacking weed plants and causing phytotoxic problems in Cucurbitaceae. Nowadays, B. tabaci is considered one of the most damaging whitefly pests in agricultural syste...

The coccinellids Nephaspis oculatus (Blatchley) and Delphastus catalinae (LeConte) [formerly D. pusillus (LeConte)] are predators of whiteßies (Homoptera: Aleyrodidae), and have shown potential for biological control of Bemisia argentifolii Bellows & Perring in greenhouses. We observed the searching and feeding behavior of N. oculatus and D. catalinae on hibiscus (Hibiscus rosa-sinensis L.). D....

The developmental progress of silverleaf whitefly (Bemisia argentifolii) 3rd instars and 4th instar/pharate adults was monitored using a tracking system that had been designed to identify synchronous individuals in another species of whitefly, the greenhouse whitefly, Trialeurodes vaporariorum. When reared on greenbean under conditions of LD 16:8 and a temperature of 26 +/- 2 degrees C, the bod...