Vitax Plum Maggot Monitoring TrapFor plums, damsons and gages Stop plum fruit moths in their tracks with a Plum Maggot Monitoring Trap. A strong, corrugated trap with hanger, the Plum Maggot Monitoring Trap is suitable for organic gardening and can monitor between three and five trees. Maggot damage in plums, damsons and gages is mainly caused by caterpillars of the plum fruit moth. The female moths lay eggs on the leaves and fruits. After 10 14 days, the caterpillars bore into the