Enhancing the efficacy of insecticides by mixing with table salt - a soft approach to manage stinkbugs in cotton

Date Issued:2002-08-13

Abstract

In recent years late season populations of stinkbugs (green vegetable bug and green stink bug) have caused considerable damage in some cotton crops (Simpson et al. 2000, Khan and Bauer 2001). Over the past cotton season, in different valleys including the South Burnett and Macquarie, I or 2 insecticide sprays were required to manage Green vegetable bug (GVB). In Australia, the insecticides currently registered for control of stinkbugs are mostly non-selective and are disruptive to a wide range of beneficial species. Use of these insecticides during stage II of the insecticide Resistance Management Strategy (IRMS) therefore undermines IPM programs aimed at conserving beneficials. Therefore, the development or evaluation of less disruptive control tactics for stinkbugs is urgent. No soft chemicals are currently available, through a number of products registered for control of other pests are. One way of making existing chemicals less disruptive is by lowering their dose, but this is not always effective. In Brazil, a mixture of salt and lower dose of chemicals is being used to enhance efficacy of the chemicals to control GVB in soybean (Corso and Gazzoni 1998, Hugh Brier pers. communication 2001). The objective of this study was to evaluate the efficacy of existing chemicals mixed with table salt and to measure their impact on beneficial insects.

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