海陵公社是广东沿海的一个海岛公社,植被比较简单,作物以水稻为主。过去,由于单纯依靠化学农药除虫,每次大面积用药后,比大陆其他地方更容易引起自然天敌的凋落,因而近十年来,这个海岛公社的害虫发生比其他邻近地方为重。1966年以前,水稻的主要 Hailing commune is an island commune along the coast of Guangdong, vegetation is relatively simple, the main crop of rice. In the past, pest insects in this island commune had been harder to produce than other neighboring places in the past decade for the simple reason that insect pests rely solely on chemical pesticides, each time large-area drug use is more likely to cause natural enemies than the rest of the continent. Before 1966, the main rice