TITLE

Detection of a chemical marker from ovipositing females in Rhynchophorus ferrugineus (Coleoptera: Curculiondae)

AUTHOR(S)
Salem, Mohamed S.; Belal, Mohamed H.; Nour, Mahmoud E.; Sayed, Emad A.
PUB. DATE
June 2012
SOURCE
Advances in Environmental Biology;Jun2012, Vol. 6 Issue 7, p2164
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The red palm weevil, Rhynchophorus ferrugineus (Coleoptera: Curculiondae) a relatively new pest in Egypt, is spreading rapidly in the Middle East and causing widespread loss of palms, including date palms. As it spends most of its life deep inside the palm, it has been very difficult to control with currently available methods. Previous observations suggested the existence of a semiochemical which discouraged females from laying in a spot already containing eggs. This study aimed to confirm the existence of a semiochemical and identify it. Firstly, the external and internal morphology of the female ovipositor and related sensilla were carefully examined, photographed and described. Secondly, compounds adhering to the egg surface were extracted, their egg-laying deterrence tested and their constituents analyzed. The sites treated with the extracts contained fewer eggs twenty-four hours after treatment. Analysis of the extracts by GC-MS revealed several possible signaling compounds, the most abundant of which was tentatively identified as oleic acid.
ACCESSION #
90476801

 

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