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西瓜全生育期多处于高温高湿季节,加上藤叶多汁,病虫害发生普遍较重。不合理的栽培措施也加重了西瓜病虫害的发生,如西瓜重茬、瓜田排水不良、不合理的密植、复种指数过高、施用未腐熟的有机肥、偏施氮肥等,农药的不合理施用、乱用、滥用农药等也导致西瓜病虫害防效差,农药残留高,既不能防治病虫,又对消费者健康带来很大危害。
The whole growth period of watermelon in the high temperature and humidity season, coupled with juicy vine leaves, pests and diseases are generally heavier. Irrational cultivation measures also aggravate the occurrence of watermelon pests and diseases, such as watermelon stubble, melon field drainage, unreasonable close planting, multiple crop index is too high, the application of not decomposed organic fertilizer, partial nitrogen fertilizer, irrational application of pesticides, indiscriminate use , Abuse of pesticides, etc. also lead to poor watermelon pest control effect, high pesticide residues, neither pest control, but also a great harm to consumer health.