Hassanali, AhmedDemas, Fanuel A.Mwangi, Esther N.Kunjeku, Edna C.Mabveni, Audrey R.2013-04-302013-04-302000-01-03Journal of Chemical Ecology (impact factor: 2.66). 03/2000; 26(4):1079-1093.http://ir-library.ku.ac.ke/handle/123456789/6720DOI:10.1023/A:1005497201074The response of mated naive Ixodiphagus hookeri females to cattle and Amblyomma variegatum nymphal odors was tested in a Y-tube olfactometer. I. hookeri females were attracted to cattle urine, dung, and odors from tick-free feeding sites of A. variegatum nymphs on cattle, e.g., dewlaps, front heels, and hind heels. Tick-free scrotal odors did not attract the parasitoids. Furthermore, odors from off-host unfed and fed A. variegatum nymphs did not attract the parasitoids, despite an increase in the number of the nymphs to amplify any odor signal. A blend of odors from feeding on-host nymphs and cattle scrota attracted the parasitoids. In T-tube bioassays, I. hookeri females were attracted to hexane washes and fecal extracts of A. variegatum nymphs.enArticle