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Title: Bioassay of new insecticides for the control of the green mirid Creontiades dilutus (Stal)
Authors: Simpson, Gordon
Cornford, Renee
Issue Date: 14-Aug-1998
Publisher: Australian Cotton Growers Research Association
Abstract: The green mind, Creontiades dilutes (Stal) (Hemiptera: Miridae), is an important but sporadic pest of cotton which destroys small squares on cotton plants (Pyke and Brown, 1996). Destruction of the squares occurs during feeding when mirids insert their stylets into the plant tissue and release pectinase, causing desiccation and death of the surrounding cells (Pyke and Brown, 1996). Green minds are often controlled in conventional cotton crops by the same broad-spectrum sprays used to control heliothis. Specific sprays of organophosphates or pyrethroids are sometimes necessary to control green mirids, but these products disrupt beneficial organisms. Their use should be limited in order to conserve beneficial numbers during the pre-flowering period of crop growth. The pest status of the green mirids is expected to increase on INGARD cotton for two reasons. Firstly, fewer sprays are required to control heliothis in INGARD cotton, so coincidental control of green mirids is less likely. Secondly, INGARD cotton produces a protein that is highly toxic to caterpillar pests, but the toxin has no effect on green mirids. Alternative products for green mirids control are essential. Two new chemical products with promise for mirid control were bio assayed with standard products currently used to control green mirids in cotton and other crops. Knowledge of the required doses of these insecticides can be used to determine doses for field testing of the products.
Appears in Collections:1998 Australian Cotton Conference

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