上海市耕地面积较少,但种植作物种类复杂、病虫发生种类多。长期以来,本市农作物病虫预报的发布基本上采用以纸张为载体的传统的传递方式。由于这种方式环节多、时间长,一些暴发性、突发性病 The cultivated area in Shanghai is relatively small, but the types of crops grown are complex and the number of pests and diseases is large. For a long time, the release of crop diseases and insect pests in this Municipality has basically adopted the traditional delivery method using paper as carrier. Because of this method more links, a long time, some outbreaks, sudden illness