昆虫的危害始终是对各种农作物的主要威胁。在一些发展中国家,每年因虫害而使农作物减产一半之多。甚至在美国,每年也因虫害而使农作物减产五分之一。昆虫飞移活动的监测是防止农作物虫害的主要信息来源。可是,至今仍没有一种可靠的装置来进行这种监测。美国夏威夷和密执安两州的昆虫学家的研究工作,可能正在朝着解决这个问题的方向迈进。他们所研制的一种新仪器,可以在昆虫飞过一个传感器 The dangers of insects have always been a major threat to various crops. In some developing countries, crops are cut by as much as a half as much as pests every year. Even in the United States, pests cut their crops by one-fifth every year. Insect fly monitoring is a major source of information to prevent crop pests. However, to date, there is no reliable device for such monitoring. The work of entomologists in Hawaii and Michigan in the United States may be moving toward solving this problem. A new instrument they developed that could fly a sensor over insects