Aphids, which feed solely on plant phloem sap, have developed symbiotic associations with bacteria that provide them with the amino acids that are lacking in phloem. Three soybean aphid (Aphis glycines Mat samura) populations were screened for the presence of Buchnera aphidicola and three common species of secondary aphid symbionts (Serratia symbiotica, Hamiltonella defensa, and Regiella insect...

The coconut palm, Cocos nucifera L. (Arecales: Arecaceae), is currently grown extensively throughout the intertropical zones of the world, including Brazil, where it constitutes an important source of income for growers. Although whiteflies are not normally considered coconut pests, these insects can damage crops directly by sucking the sap, which weakens the plant; indirect damage may be cause...

The cotton intercropping experiment was conducted for the management of sucking pests, viz. leafhopper, Amrasca biguttula Ishida (Hemiptera: Cicadellidae); whitefly, Bemisia tabaci Gennadius Aleyrodidae) and thrips, Thrips Linderman (Thysanoptera: Thripidae) in desi cotton, Gossypium arborium. results study revealed that less mean population leafhopper nymphs, whitefly thrips adults recorded fr...

Greenhouse whitefly, Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae), is a serious pest of numerous crops grown in greenhouses and field-grown strawberry yr-round production areas California, USA. Problems with insecticide resistance have prompted the search for more sustainable methods their management. Here, we applied UV-C light treatments nightly 16 s (19.2 J m–2) over 6-wk pe...

W. B. Hunter, University of Florida, Gulf Coast Research and Education Center, 5007 60 St. E., Bradenton 342039324; E. Hiebert, University of Florida, Plant Pathology Department, 1453 Fifield Hall, Gainesville 32611-0680; S. E. Webb, University of Florida, Central Florida-REC, 5336 University Ave., Leesburg 34748-8232; J. H. Tsai, University of Florida, Ft. Lauderdale-REC, 3205 S.W. College Ave...

Host plant performance, esterase, and virus transmission tests revealed cassava-strain and sweetpotato-strain populations of whiteßy Bemisia tabaci (Gennadius) biotypes in India. Individuals from the sweetpotato-reared population did not breed on cassava, Manihot esculenta Crantz, and the cassava-strain-reared individuals failed to develop on sweetpotato, Ipomoea batatus (L.) Lam. Eggplant, Sol...

The resistance levels to alpha-cypermethrin, bifenthrin, pirimiphos-methyl, endosulfan and imidacloprid were determined in Bemisia tabaci (Gennadius) from Crete. Five B tabaci populations collected from greenhouse and outdoor crops were bioassayed and compared with a reference susceptible strain. Bemisia tabaci collected in a floriculture greenhouse exhibited the highest resistance against all ...