| Title: | Attraction of pea moth Cydia nigricana to pea flower volatiles |
| Address: | "Bioforsk - Norwegian Institute for Agricultural and Environmental Research, Division of Plant Health and Plant Protection, Hogskoleveien 7, NO-1430 As, Norway. Electronic address: gunda.thoeming@bioforsk.no. Bioforsk - Norwegian Institute for Agricultural and Environmental Research, Division of Plant Health and Plant Protection, Hogskoleveien 7, NO-1430 As, Norway. Electronic address: geir.knudsen@bioforsk.no" |
| DOI: | 10.1016/j.phytochem.2014.01.005 |
| ISSN/ISBN: | 1873-3700 (Electronic) 0031-9422 (Linking) |
| Abstract: | "The pea moth Cydia nigricana causes major crop losses in pea (Pisum sativum) production. We investigated attraction of C. nigricana females to synthetic pea flower volatiles in a wind tunnel and in the field. We performed electroantennogram analysis on 27 previously identified pea plant volatiles, which confirmed antennal responses to nine of the compounds identified in pea flowers. A dose-dependent response was found to eight of the compounds. Various blends of the nine pea flower volatiles eliciting antennal responses were subsequently studied in a wind tunnel. A four-compound blend comprising hexan-1-ol, (E)-2-hexen-1-ol, (Z)-beta-ocimene and (E)-beta-ocimene was equally attractive to mated C. nigricana females as the full pea flower mimic blend. We conducted wind-tunnel tests on different blends of these four pea flower compounds mixed with a headspace sample of non-flowering pea plants. By considering the effects of such green leaf background odour, we were able to identify (Z)- and (E)-beta-ocimene as fundamental for host location by the pea moths, and hexan-1-ol and (E)-2-hexen-1-ol as being of secondary importance in that context. In the field, the two isomers of beta-ocimene resulted in trap catches similar to those obtained with the full pea flower mimic and the four-compound blend, which clearly demonstrated the prime significance of the beta-ocimenes as attractants of C. nigricana. The high level of the trap catches of female C. nigricana noted in this first field experiment gives a first indication of the potential use of such artificial kairomones in pea moth control" |
| Keywords: | "Animals Arthropod Antennae/drug effects Behavior, Animal/*drug effects *Biological Assay Dose-Response Relationship, Drug Female Flowers/*chemistry Laboratories Moths/*drug effects Odorants/analysis Peas/*chemistry Volatile Organic Compounds/*pharmacology;" |
| Notes: | "MedlineThoming, Gunda Knudsen, Geir K eng Research Support, Non-U.S. Gov't England 2014/02/11 Phytochemistry. 2014 Apr; 100:66-75. doi: 10.1016/j.phytochem.2014.01.005. Epub 2014 Feb 5" |
