目前,不少常用杀虫药剂,往往会使害虫对它产生抗药性,不能达到理想的效果;有时还会引起害虫的大量繁殖。同时,不少杀虫剂对人畜和庄稼都有很大的毒害。可是,科学家最近研究出来的一种新型杀虫药——拒食剂,却没有这些缺点。害虫对它不会产生抗药性,且对人畜的毒性也较低,所以是一种此较理想的新型杀虫药。 At present, many commonly used insecticide agents often cause pests to become resistant to it and fail to achieve the desired effect; in some cases, it causes large numbers of pests to multiply. At the same time, many pesticides have great toxicity to humans, animals and crops. However, a new type of insecticide recently researched by scientists - antifeedant, but without these shortcomings. Pests to it will not produce resistance, and toxicity to humans and animals is also low, so it is a more ideal new insecticide.