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四、病虫防治柑桔是多年生植物,病虫害较多。主要有溃疡病、疮痴病、蚧壳虫、红蜘蛛、蚜虫、黑刺粉虱等。在新梢3～5厘米时,喷施90％的多菌灵1000倍液或14％胶氨铜250～300倍液,防治溃疡病和疮痂病,效果较好。防治害虫常用的化学药剂有40％的氧化乐果1000～1200倍液、马拉硫磷乳剂800～1000倍液、20％的三氯杀螨醇乳油800～1000倍液、15％达螨尽乳油3000～4000倍、机油乳剂100～400倍液(花期和高温期慎用)。以上不同种类的农药应交替使用,以免害虫产生较强的抗药性。
Fourth, the pest control Citrus perennial plants, pests and diseases more. There are mainly ulcer disease, ulcer disease, scale insects, spider mites, aphids, black thorn whitefly and so on. In the shoot 3 to 5 cm, sprayed with 90% of carbendazim 1000 times or 14% glue cuprammonium 250 to 300 times, prevention and control of ulcer disease and scab disease, the effect is better. Pesticides commonly used in the prevention and treatment of pesticides are 40% omethoate 1000 to 1200 times, malathion 800 to 1000 times the liquid, 20% of dicofol EC 800 to 1000 times, 15% of mites to make EC 3000 ~ 4000 Times, 100 to 400 times the oil emulsion (florescence and high temperature caution). The above different types of pesticides should be used alternately, so as to prevent pests produce strong resistance.