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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Aggregation pheromone system of nymphal gregarious desert locust, Schistocerca gregaria (Forskål)
Journal of Chemical Ecology, Volume 22, No. 12, Year 1996
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Description
Hexanal, octanal, nonanal, decanal, hexanoic acid, octanoic acid, nonanoic acid, and dccanoic acid were identified in the volatile emissions from fifth instars of Schistocerca gregaria by coupled gas chromatography-electroantennography (GC-EAD) detection and coupled GC-mass spectrometry (MS). In laboratory assays, synthetic blends of the eight compounds, with acids and aldehydes tested separately, evoked strong aggregation responses from fifth instars, similar to responses evoked by a crude volatile extract of the nymphs. A nymphal fecal volatile phenolic blend of guaiacol and phenol, which we have previously shown to evoke an aggregative response from different stages of the insect, significantly synergized the activity of the blend of eight compounds, suggesting mutually augmentative roles for nymphal and fecal volatiles in evoking aggregation. These results indicate that the aggregation behavior of gregarious second to fifth instars is modulated by three sets of pheromonal compounds: aldehydes and acids emitted by the nymphs themselves and phenols associated with their feces. © 1996 Plenum Publishing Corporation.
Authors & Co-Authors
Torto, Baldwyn
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Njagi, Peter George Nganga
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Hassanali, Ahmed
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Amiani, Habert
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Statistics
Citations: 71
Authors: 4
Affiliations: 1
Identifiers
Doi:
10.1007/BF02029546
ISSN:
00980331