Journal
JOURNAL OF INSECT PHYSIOLOGY
Volume 48, Issue 4, Pages 459-465Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0022-1910(02)00067-7
Keywords
deterred oviposition; larval frass; Monochamus alternatus; oviposition behavior; oviposition scar
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To determine the effect of larval frass of Monochamus alternatus on oviposition preference of the female adults, three tests were performed in the laboratory. Individual females were provided with a frass-coated, Pinus densiflora bolt and an untreated bolt simultaneously and were allowed to oviposit for 24 h. They deposited a significantly smaller number of eggs on frass-coated bolts. The females supplied with frass-coated bolts deposited no eggs on them, indicating that the larval frass deterred the females from oviposition. When individual females were provided simultaneously with a pine bolt applied with a methanol extract of larval frass and another bolt applied with methanol alone, they deposited a significantly smaller number of eggs on frass extract-applied bolts for 24 h. These results suggest the presence of a putative oviposition deterrent in larval frass of M. alternatus. Each test was replicated 19-20 times using different females. (C) 2002 Elsevier Science Ltd. All rights reserved.
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