Use of selective insecticides to control the cotton leaf worm

Abstract

The objective of this work was to verify the effect of the selective insecticides: diflubenzuron, trichlorfon, endosulfan, and Bacillus thuringiensis, compared to the standard methyl parathion, on Alabama argilacea (Hübner, 1818). The experiment was conducted on the "Varzinha" farm, at Iguatu city, State of Ceará, Brazil, using the "IAPAR 4 PR 1" cotton variety. The results showed that diflubenzuron (13 - 15 gr. a.i./ha) trichlorfon (138 - 178 gr. a.i./ha), endosulfan (394 gr. a.i./ha) and Bacillus thuringiensis (14 - 21 gr.a.i./ha) were as good as the standard methyl parathion (187 gr.a.i./ha) and had a superior residual effect.