Monitoring Heliothis armiger (Hübner) strains from Queensland for insecticide resistance

Abstract

During the period 1975 to 1980, insecticide resistance testing of Heliothis armiger from areas of Queensland was conducted to monitor changes in the resistance status of strains from the major cotton growing areas, to determine base-line LD50 values for new insecticides, and to test for suspected resistance in strains from other areas. In the cotton growing areas levels of resistance to DDT + camphechlor (1:2) and parathionmethyl remained fairly steady, while endosulfan resistance levels fell at St George and Emerald. No evidence of resistance to the synthetic pyrethroids was detected. Data for several insecticides on strains from Mareeba, Biloela and Kingaroy are reported.