
Cabbage stem flea beetle numbers have been increasing since the 2013 ban on neonicotinoid seed treatments in OSR with serious yield losses, especially in the East and South-East of the country. (Image source: AJC1/Flickr)
Rothamsted Research is asking oilseed rape (OSR) growers to send samples of adult cabbage stem flea beetles collected at harvest to assess levels of both pesticide resistance and parasitisation by natural enemies in the UK