病虫害防治

果树病虫害种类极多，仅柑桔就有病害近 100 种，虫害 354 种；梨病害80 多种，虫害 341 种。防治病虫害必须“预防为主，综合防治”。预防为主就是在病虫害发生之前采取措施，把病虫害消灭在未发生

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