如果您不是一个认真的奉献者organic foods,您可能会假设“有机”和“杀虫剂”一词是互斥的。但是再猜猜。即使是赢得美国农业部认证的有机标签的农民,也要求他们遵守环境可持续和健康意识的方法,也允许一些摆动的空间使用某些合成化学物质和农药来控制虫子,杂草和杂草疾病。基本上,当首选的非化学方法(例如昆虫陷阱,农作物旋转和手动吹动)不足以保护农作物免受破坏不足时,这个例外就开始了[来源:USDA]。也就是说,允许的人造助手通常不是DDT ILK的重型虫子杀手。其中大多数是相对温和的物质。例如,服用碳酸氢钾。这是一种制成化学物质,是针对白粉病的有效杀菌剂,但并不会给人类带来任何明显的长期健康问题(即使它可以干扰小鼠的繁殖)[来源:来源:FDA]。
Even so, a lot of hardcoreorganic farmers——和diy有机园丁wouldn't even think of using anything artificial on their precious fruits and vegetables. Instead, if they feel the need to use a pesticide (or an insecticide, which is simply a type of pesticide that targets bugs), they turn to an assortment of natural substances. Some are gleaned from exotic foreign plants. For example, sabadilla is a bug repellant made from seeds of a South American lily, and Ryania, an antidote to European corn borers and harmful worms, is concocted from the ground stems and roots of a South American shrub. They also utilize more commonplace substances, such as a puree made from cornstarch and crushed tomato leaves -- it contains solanine, a chemical that has an inhibiting effect on black spot fungus [source:亚伯拉罕]。
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But are these organic bug and fungus fighters really effective? And more importantly, are they even safe? First, let's delve into the various types of organic insecticides.