Countries in temperate zones have chilly winters that kill off a fraction of the farm pests annually, but things are different in warm, rainy Taiwan. Even should a farmer desire to go organic, he must first contend with pests and then with particles of pesticides and chemical fertilizers being blown over from nearby fields. Unless there is a sufficient buffer between farms, it's pointless to even think of organic farming.
溫帶國家有寒冬可滅除部份病菌及害蟲，但在高溫多雨的台灣，即便農民有心做有機，一來難逃病蟲害，二來難逃鄰近田間「飄」來的農藥與化肥，除非擁有廣大的隔離田區，否則根本是空談。