Key Points
- Control of grass grubs may be improved through understanding their lifecycle, how the weather influences their survival and the influence of natural pathogens and predators
- In a cropping situation, cultivation can be used effectively to reduce the population in both autumn and spring
- Gaucho seed treatment resulted in the best establishment of cereal seedlings compared with the other products registered for grass grub control but Gaucho did not result in the greatest grub mortality.
- Invade is a biocontrol agent being tested experimentally as a seed treatment. Invade enabled seed establishment equivalent to Gaucho
- The granular insecticides were most effective in killing grubs but seedling emergence appeared to be less than with the seed treatments, particularly for Gesapon