Publication Type

Journal Article

Journal Name

Journal of Chemical Ecology

Publication Date

9-1-1990

Abstract

Electroantennograms (EAGs) were recorded from male and female moths of two sympatric leaf folder species, Cnaphalocrocis medinalis (Gue-née) and Marasmia patnalis Bradley (Lepidoptera: Pyralidae) to 91 volatile chemicals of plant origin. Responses of both leaf folder species were similar to all compounds except to three monoterpenes-β-myrcene, menthone, and isomenthone- and two sesquiterpenes-cis-nerolidol and isophytol. Response of M. patnalis, an oligophagous leaf folder, to these compounds was higher compared with that of polyphagous C. medinalis. EAG responses of males to saturated and unsaturated aliphatic aldehydes were significantly higher than those of conspecific females in both species. A higher response of C. medinalis males also was observed for 1-nonanol, 3-nonen-2-one, and trans, trans-2,6-dimethyl-2,4,6-octatriene. In contrast, females of both species responded more to monoterpenes, borneol, isoborneol, and fenchyl alchohol. Response of C. medinalis female was higher for terpinen-4-ol, carveol, dihydrocarveol, (-)-myrtenal, and perillaldehyde. In both species and sexes, high EAG responses were recorded for compounds of the green leaf odor complex. EAG responses to nonanal and hexanal were maximum among the aliphatic aldehydes while 1-hexanol elicited the highest response among the alcohols tested. EAG responses to terpene compounds-citronellal, α-terpineol, and (-)-myrtenal-were equal to the response to 1-hexanol. While all compounds tested elicited a negative potential, thymol and carvacrol elicited a positive EAG potential. The EAG data are discussed with regard © 1990 Plenum Publishing Corporation.

Keywords

Cnaphalocrocis medinalis, electroantennogram, green leaf volatiles, host-plant resistance, Lepidoptera, Marasmia patnalis, olfaction, plant volatiles, Pyralidae, rice leaf folder

Download

Share

COinS