Yellow-white larvae up to 6mm long, tunnel in roots, underground stems
and shoots. Young shoots
The problem is often worse on early
flowering stools brought into the greenhouse for propagation.
A spray strength insecticide can be watered into the soil before
lifting stools or after boxing up.
A watering with Imidacloprid would
give control and protect the stools from further attack while
controlling aphids, leaf miner and other pests as well.