The value of unsprayed. strip crops as nurseries for beneficials in dryland cotton on the Darling Downs

Date Issued:2002-08-13

Abstract

We are currently evaluating unsprayed strip crops planted beside dryland INGARD cotton as nurseries for beneficial arthropods. In the first season of trial work (1999/2000) lablab was evaluated as a nursery (Scholz et o1. 2000). While lablab harboured some species of predators, it supported few Trichogramma egg parasitoids. Trichogramma wasps are considered important beneficials on the Darling Downs and a nursery crop that supports them, as well as other beneficials, may be useful for managing heliothis and other pests. Consequently, during the 2000/01 cotton season we evaluated unsprayed sorghum, maize and soybean strips as beneficial nurseries for adjacent lNGARD cotton.

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