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Alert for new stem fly outbreak

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Stem fly can exist in a crop almost undetected and cause sizeable crop losses if not identified early... At the permitted 800mL/ha rate, dimethoate also kills natural predators of stem fly, resulting in a flare-up of other pests such as silverleaf whitefly, mites and Helicoverpa, Mr Brier says... Mr Brier says the "go soft early" IPM strategy should be used to conserve parasites of stem fly by avoiding non-selective 'hard' pesticides for as long as possible, especially synthetic pyrethroids (for example deltamethrin), organophosphates (for example dimethoate) and carbamates (for example methomyl and thiodicarb)...
GRDC Taxonomy: