Imidacloprid should only be applied once a year. The pupal stage lasts from 1 to 3 weeks. The pattern of the feeding tunnel and the layer of the leaf being mined is often diagnostic of the insect responsible, sometimes even to species level. Insecticide products that contain the natural insecticides azadirachtin or spinosad show some efficacy against larvae and are safe for natural enemies. Leaf miners are regarded as Adult leaf galleries by many farmers Adult leaf galleries gardeners as they can cause damage to agricultural crops and garden plants, and can be difficult to control with insecticide sprays as they are protected inside the plant's leaves.