INSECTICIDE RESISTANCE IN HELICOVERPA ARMIGERA (HÜBNER): STATUS AND PROSPECTS FOR ITS MANAGEMENT IN INDIA
Mar 13, 2017

Crop Protection WCRC Croprotection-Asia WCRC1
Abstract                                                                         Back to Table of contents

Insecticide resistance and concomitant field failures to control the cotton bollworm, Helicoverpa armigera (Hübner) were first recorded in south India in 1987. During the 1992/93 cropping season a discriminating dose technique was used to routinely monitor resistance in four major cotton and pulse growing areas of Andhra Pradesh State. Very high levels of resistance to pyrethroids and significant endosulfan and organophosphate resistance were a feature of all regions monitored  - the intensity of expression being determined by local selection pressure and mixing of populations by windborne migration against a changing background of insecticide use across seasons. Levels of piperonyl butoxide insensitive pyrethroid resistance were higher in the more intensive insecticide use regions. Farmers are applying more frequent and higher doses of insecticides, often as mixtures, in an attempt to control resistant H. armigera, but field failures and economic losses are common. Wide-scale implementation of insecticide resistance management (IRM) rationale, resulting in greater control over the use of insecticides is urgently needed to reduce the resistance selection pressure on conventional insecticides and to conserve susceptibility to newer insecticides and biorationals with novel modes of action. Constraints and prospects for IRM implementation in India are discussed.

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