EVALUATION OF SOME BIOINECTICIDES AGAINST BEMESIA TABACI (GENN.) And EFFECT ON YIELD COMPONENT OF CUCUMBER

Abstract

Bemisia tabaci (Genn.) is considered the main factor of yellow leaf curl virus for cucumbers and other crops such as tomato, pepper, aubergine, okra, soybean, cotton and ornamental plants. Field trials were conducted in Fayoum Governorate, district of Fayoum on four cucumber varieties in four transplantations dates; 1 / 3, 1 / 4, 1 / 9 and 1 / 10 / 2011 to study the efficiency of the bioinsecticides, Mycotal (Verticillium lecanii), Biosect (Beauveria bassiana) and their mixture as well as Capel 2 E.C against the second instar nymphs of the whitefly B. tabaci. Tested cucumber varieties were Medina, Amera, Dama and Maram.In that concern, Dama variety proved to be less sensitive and the mean of reduction was (79.8%) and Amera was more sensitive showing reduction rate of (94.7%) in 1 / 3 / 2011.