ICIPE, P.O. Box 30772, Nairobi, Kenya.
J Chem Ecol. 1993 Aug;19(8):1665-76. doi: 10.1007/BF00982299.
The response of nymphal and adult gregarious phase desert locust,Schistocerca gregaria, to a choice of two columns of air, one permeated with airborne volatiles emanating from nymphs or adults and the other untreated, was investigated in a single-chamber bioassay arena. The nymphs, whether released individually or in groups, preferred to be within the precinct of the air column treated with airborne volatiles of the nymphs but were indifferent to volatiles of the adults. Conversely, older adults responded only to their own volatiles but not to those of the nymphs or young adults. The young adults were responsive only to volatiles of the older adults. Charcoal-trapped volatiles from the nymphs and the adults reproduced the effect of living locusts. These results indicate that there are two different aggregation pheromones inS. gregaria: a juvenile pheromone produced by nymphs and an adult pheromone specific to adults.
在一个单室生物测定场中，研究了群居期沙漠蝗若虫和成虫对两个空气柱的选择反应，一个空气柱充满了来自若虫或成虫的空气挥发物，另一个未处理。若虫无论是单独释放还是成群释放，都更喜欢在充满若虫空气挥发物的空气柱内，但对成虫的挥发物漠不关心。相反，大龄成虫只对自己的挥发物有反应，而不对若虫或年轻成虫的挥发物有反应。年轻成虫只对大龄成虫的挥发物有反应。从若虫和成虫中捕获的木炭挥发性物质再现了活体蝗虫的效果。这些结果表明，沙漠蝗有两种不同的聚集信息素：由若虫产生的幼体信息素和成虫特有的成虫信息素。
