This Pheromone lure refill for the Growing Success Apple Maggot Monitoring trap collects moths and prevents damage to apple as well as pear trees. Does not attract beneficial insects Pesticide free and suitable for organic gardening Why Use The main cause of maggot damage in apples and pears is due to caterpillars produced by the codling moth. In winter female moths lay eggs in trees. The eggs hatch out into caterpillars which feed on fruit in early summer. The monitoring trap allows gardeners to assess the infestation problem and treat with a suitable insecticide if necessary. Use refill with Growing Success Apple Maggot Trap What to Expect If more than 12 moths are trapped per week this would indicate an infestation. If traps are full then replace sticky insert and pheromone