植物学家在南美丛林中发现了一些奇花异草，能够释放臭不可闻的硫磺气体来对抗真菌和寄生虫的侵袭。美国佐治亚大学的科学家哈特尔认为，此类异臭气体可用来帮助农民减少对农药的依赖。一种方法是在休耕期的农田中种植此类植物，待到春天耕翻时再迫使其释放气体。另一种方法则 Botanists found some exotic flowers in the jungle of South America that release unobtrusive sulfur gases against fungi and parasites. Hartleer, a scientist at the University of Georgia in the United States, believes such offensive odors can be used to help farmers reduce their dependence on pesticides. One way is to plant such plants in the field during the fallow period and force them to release the gas when they are tilled in spring. Another way then