美国农业部农业研究局正在研究赤眼卵蜂寻找寄主的生化机制。早先用玉米食穗虫进行的研究表明成虫产卵处沾染成虫体臭时卵蜂在该处的产卵量就大。成虫产卵时从翅上掉下来的鳞片似乎是诱使卵蜂寻找寄主虫卵的一种刺激来源。研究者用鳞片的提取物来试验它对卵蜂的寻找动作所起的刺激作用。在上述场合,卵蜂的寄生率都比未用提取物处理的提高50%左右。后来,研究者更对这种提取物进行了 The USDA’s Agricultural Research Service is studying the biochemical mechanism of the Eichhornia crassipes seeking hosts. Earlier studies using corn earworms showed that adult eggs spawned at the site of the eggs when they were stained by adult worms. The scales that fall from the wings when the adult spawns appear to be a source of stimulus for the egg to find the host egg. Researchers used scaly extract to test its stimulating effect on the search behavior of egg bees. In these cases, the parasitoids were all increased by about 50% compared with those not treated with the extract. Later, the researchers conducted the extract more