suSCon Maxi AND CONTROL OF CHILDERS, NEGATORIA AND SOUTHERN ONE YEAR CANEGRUBS IN SUGARCANE

THIS PAPER summarises efficacy data collected to satisfy requirements to register the granular controlled-release (CR) insecticide suSCon1 ® Maxi (50 g imidacloprid/kg) to control damage by Childers canegrub (Antritrogus parvulus), negatoria canegrub (Lepidiota negatoria) and southern one-year canegrub (Antitrogus consanguineus) to the root-mass of sugarcane crops in southern Queensland. The paper further illustrates collaborative research and development (R&D) to provide products suited to the sugarcane industry’s needs, following a similar process to register suSCon Maxi for control of greyback canegrub. Populations of all three species were markedly reduced in first and second ratoon crops by treatment with 10 kg/ha of product applied into the planting furrow either at-planting or at drill fill-in. Cane yield increased in first and second ratoon crops, following these population reductions. These data support submissions to register suSCon Maxi for control of all three species up to second ratoon. Additional data is probably sufficient to support registration to control Childers canegrub for up to four crop-years (3rd ratoon). suSCon Maxi was equally as effective as other registered CR products against negatoria and southern one-year canegrubs, and more effective against Childers canegrub.