Insecticide selection Fipronil may be able to control locusts in treated areas for up to a week but Fipronil is only registered for and can only be used on pastures and sorghum. It must be used at recommended rates otherwise withholding periods increase substantially. All other insecticides can only be used to directly control locust infestations. Most insecticides will control locusts within 24 hours. Fipronil when used at the recommended rate can take several days to reach maximum mortality.
All insecticides are toxic to bees.
The degree of susceptibility of bees to the insecticides registered for use against locusts varies somewhat. If hives need to be moved then they should be moved at least 10 kilometres away from areas being sprayed. Effect of insecticides on crustaceans All insecticides are toxic to crustaceans. Extreme care must be exercised if there are crustaceans in dams on your property or on your neighbours' properties. Buffer areas around ponds should extend one kilometre upwind and 300 metres downwind when applying insecticide by aeroplane or mister, and 300 metres upwind and 100 metres downwind when using a boomsprayer.