Flies
lettuce, and herbs also causes cosmetic damage, and sometimes this can occur on such a scale that growth, particularly of young cuttings, can be retarded [...] in greenhouse and field crops, where they disturb plant growth, spread diseases and affect crop hygiene. Their larvae can damage roots and growing media [...] monitoring and natural enemies that reduce both larval and adult populations: Beneficial nematodes Predatory mites Pheromone traps, lures, and attractants