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落叶夜蛾是福鼎市柑桔园１０种吸果夜蛾中主要种，１ａ发生４～５代，世代重叠，以幼虫和蛹在草丛、土缝、石隙中越冬。３月下旬始见第１代成虫，全年出现５个羽化高峰期，分别为８月２０日、９月１１日、１０月１日、１０月１９日和１１月８日。成虫用喙刺破果皮、吸食果汁，造成果实伤口或落果。果实受害率达４０％～６０％，减产２０％～３０％。调整柑桔品种布局，清除寄主植物，糖酒醋药液诱杀和套袋阻隔可有效地控制其危害
Spodoptera litura is the main species in 10 species of Citrus sinensis in Fuding citrus garden. 1a to 4 ~ 5 generations, generations overlap, larvae and pupae in the grass, soil cracks, the gap in the winter. The first generation adults were seen in late March, with five emergence peaks throughout the year, namely August 20, September 11, October 1, October 19 and November 8 respectively. Adult beak pierced peel with fruit, drink fruit juice, causing fruit wounds or fruit drop. Fruit damage rate of 40% to 60%, cut 20% to 30%. Adjust the citrus variety layout, remove the host plants, sugar alcohol vinegar liquid trap and bagging barrier can effectively control the harm