去年五月,我偶然在一朵月季花上放了几颗呋喃丹小粒,没想到,五分钟后,停在花瓣上的几只甲虫全被杀死。后经反复观察,发现呋喃丹是一种对甲虫起触杀作用的特效农药,其优点是:①毒性剧烈。将少许呋喃丹颗粒置于花瓣中间,甲虫的须、足、翅等任何部位只要略微碰一下药粒,就必死无疑。②药效持久。在无雨无露水的情况下,药效可维持一星期以上。新飞来的甲虫即使不直接触及药粒,而只是碰一下被毒死的甲虫,也很快中毒 In May last year, I accidentally put a few carbofuran pellets on a rose, but did not expect that after five minutes all the beetles on the petals were killed. After repeated observation, found that carbofuran is a kind of effect on the beetle contact effects of pesticides, its advantages are: ① severe toxicity. A small amount of carbofuran granules placed in the middle of petals, beetles, beard, feet, wings and any other parts as long as a little touch on the tablets, it will die. ② lasting effect. In the case of no rain without dew, the efficacy can be maintained more than a week. The newly arrived beetle poisones quickly even if it does not touch the pellet but only touches the poisoned beetle