Insecticide products suitable for controlling Australian plague locusts will work for Yellow winged locusts. Landholders should seek expert advice from a chemical reseller or agronomist as to which insecticide best suits their situation and use the chemical products according to the label instructions. All chemicals must be used in accordance with Victorian legislation. Dr Finlay said the most effective time to spray is when the hoppers are relatively small and are just starting to form aggregations or bands on the ground. For Australian plague locusts this is about two weeks after hatching when the hoppers are around 10mm long. Yellow winged locust hopper will take slightly longer to reach the aggregation stage and be slightly larger.