Answer: Rhododendron gall midge pests overwinter as pupae in the soil. The adult flies emerge and lay eggs in the spring as new plant growth develops. The newly hatched larvae protect themselves by feeding from within the curled leaf margins. When mature, the maggots drop to the soil to pupate. Heavy infestations of this pest are unusual and sporadic. An effective cultural control method for homeowners is the removal and destruction of newly infested foliage. This practice may eliminate an infestation within a single year or two. No chemicals are currently registered for control of this pest.
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