下面雅思与大家分享一篇关于生物防治病虫害的雅思阅读真题材料,主要内容是讲述了如何才能运用生物技术来防治病虫害,这样做的原理是什么,以及由此带来的好处是什么。我们一起来看看下面的这篇文章,来找一下这些问题的答案吧。
Biological Pest Control
A. Biological control is, generally, humans use of a specially chosen living organism to control a particular pest. This chosen organism might be a predator, parasite, or disease which will attack the harmful insect. It is a form of manipulating nature to increase a desired effect. A complete Biological Control program may range from choosing a pesticide which will be least harmful to beneficial insects, to raising and releasing one insect to have it attack another, almost like a living insecticide.
B. Biological control methods can be used as part of an overall Integrated Pest Management program to reduce the legal, environmental, and public safety hazards of chemicals. In addition, it may be a more economical alternative to some insecticides. Some biological control measures can actually prevent economic damage to agricultural crops. Unlike most insecticides, biological controls are often very specific for a particular pest. Other helpful insects, animals, or people can go completely unaffected or disturbed by their use. There is less danger of impact on the environment and water quality.
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