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Bull Entomol Res

Title:		Sex pheromones of Callosobruchus subinnotatus and C. maculatus (Coleoptera: Bruchidae): congeneric responses and role of air movement
Author(s):		Mbata GN; Shu S; Ramaswamy SB;
Address:		"Department of Entomology and Plant Pathology, Oklahoma State University, 127/110 Noble Research Centre, Stillwater, OK 74078, USA"
Journal Title:		Bull Entomol Res
Year:		2000
Volume:		90
Issue:		2
Page Number:		147 - 154
DOI:		10.1017/s0007485300000250
ISSN/ISBN:		0007-4853 (Print) 0007-4853 (Linking)
Abstract:		"Females of Callosobruchus spp. are known to produce sex pheromones that attract males. These sex pheromones cannot be adopted for use in pest management without first investigating the responses of the males in the windless conditions of storage environments. Consequently, behavioural bioassays of Callosobruchus subinnotatus Pic males were conducted in an olfactometer in the absence of air-flow. Under these conditions males were found to be able to follow odour trails to the source. However, the latency period was longer in diffusional bioassays than for insects in a Y-tube olfactometer that provided directional wind cues. The highest percentage of males reached the pheromone source when components of the pheromones, (E)-3-methyl-2-heptenoic acid (E32A) and (Z)-3-methyl-2-heptenoic acid (Z32A), were formulated in a 50:50 or 25:75 ratio. Males of C. maculatus (Fabricius) responded to sex pheromone of C. subinnotatus, but males of C. subinnotatus did not respond to that of C. maculatus. The two sex pheromone components of C. subinnotatus are also constituents of C. maculatus sex pheromone. These two components may be potentially useful in monitoring the populations of both species in stored beans. It is postulated that (Z)-3-methyl-3-heptenoic acid (Z33A), the major component of the sex pheromone of C. maculatus, must have acted as an antagonist inhibiting response of C. subinnotatus to the sex pheromone of C. maculatus"
Keywords:		"Air Animals Biological Assay Coleoptera/*physiology Female Flight, Animal Male *Pest Control, Biological/methods *Sex Attractants Time Factors;"
Notes:		"MedlineMbata, G N Shu, S Ramaswamy, S B eng Research Support, Non-U.S. Gov't England 2000/08/19 Bull Entomol Res. 2000 Apr; 90(2):147-54. doi: 10.1017/s0007485300000250"