Entomologist Nick Birch ex-plained that the existence of more insect generations increases the likelihood of resistant populations becoming established.
He argued that understanding insect behaviour still has a lot to offer - particularly as chemical control becomes ever more limited.
His studies of the spatial distribution of raspberry aphids in tunnels may lead to spatial control measures.
For raspberry beetle control he has developed a "raspberry flower" trap, which is laced with a chemical isolated at SCRI that smells like raspberry flowers and attracts both sexes of the beetle to the trap - where they slip into soapy water.
Traps only have to be activated for four to six weeks a year, but in a high beetle population area 50 traps per hectare will be needed. One sachet of attractant will last for a whole season and each trap has at least a five-year life.