cabbage stem flea beetle larva© Blackthorn Arable
Growers should avoid spraying insecticide to control cabbage stem flea beetle larvae in oilseed rape to reduce the risk of killing natural predators and fuelling insecticide resistance. Adult beetles move into crops during August and September to feed and mate, after which eggs are laid at the base of plants. Eggs hatch if conditions are mild enough from late September, as they were last year when larval damage was significant. Then larvae move up to feed on leaf petioles and […]