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Development of semiochemical attractants for monitoring bean seed beetle, Bruchus rufimanus
Author(s) -
Bruce Toby JA,
Martin Janet L,
Smart Lesley E,
Pickett John A
Publication year - 2011
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.2186
Subject(s) - semiochemical , olfactometer , kairomone , biology , pest analysis , electroantennography , pheromone , sex pheromone , trapping , botany , horticulture , bioassay , toxicology , ecology , predation , host (biology)
BACKGROUND: Bruchus rufimanus is a serious pest of field beans. The objective here was to develop a semiochemical‐baited trapping system to facilitate monitoring of the pest. RESULTS: Volatile compounds that were electrophysiologically active with the antennae of B. rufimanus females were identified from headspace samples of Vicia faba flowers and from male B. rufimanus . Selected headspace samples and synthetic compounds were tested in olfactometer bioassays. The semiochemicals were then formulated in lures for traps and evaluated in a field trapping experiment. Cone traps baited with a three‐component blend of floral volatiles, releasing ( R )‐linalool (17.7 mg day −1 ), cinnamyl alcohol (0.4 mg day −1 ) and cinnamaldehyde (0.77 mg day −1 ), caught significantly more of both sexes of B. rufimanus than unbaited control traps. A male volatile, 1‐undecene, was EAG active with female antennae. It was attractive to females in an olfactometer, indicating that it is a sex pheromone. However, in the field it only enhanced trap catches if it was released together with the floral volatiles. CONCLUSION: The blends of semiochemicals identified were shown to be attractive in cone traps under field conditions. The prototype trapping system developed could be used as a monitoring tool to determine infestation levels of B. rufimanus in bean fields. Copyright © 2011 Society of Chemical Industry