Cross-Resistance Shown by Aldrin-Resistant Seed Maggot Flies, Hylemya spp., to Other Cydodiene Insecticides and Related Materials1

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Laboratory tests on adult seed maggots, Hylemya spp., resistant to aldrin (X209 at LD50) established that cross-resistance occurs with other cyclodiene insecticides and some related materials. The levels of cross-resistance were heptachlor X214; heptachlor epoxide X 174; dieldrin X120; endrin X9.6; Telodrin® (1.3,4,5,6,7,8,8-octachloro- 1.3,3a,4,7,7a,-hexahydro4,7 -methanoisobenzofuran) X 7.9; lindane X5.5; and endosulfan X 1.7. The slope of the regression lines for the resistant Delhi strain was lower than that obtained with the susceptible strain. This resulted because an average 100/0 of the population was susceptible.

Document Type: Research Article

Publication date: October 1, 1964

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