Orientation ofRhizophagus grandis (Coleoptera: Rhizophagidae) to oxygenated monoterpenes in a species-specific predator-prey relationship |
| |
Authors: | Jean-Claude Grégoire Daniel Couillien Ralph Krebber Winfried A. König Holger Meyer Wittko Francke |
| |
Affiliation: | (1) Laboratoire de Biologie animale et cellulaire, CP 160, Section interfacultaire d'Agronomie, Université Libre de Bruxelles, 50 av. F. D. Roosevelt, B-1050 Bruxelles, Belgium;(2) Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-2000 Hamburg 13, Germany |
| |
Abstract: | Summary The predator,Rhizophagus grandis, is linked to its specific prey,Dendroctonus micans, by semiochemical signals regulating oviposition and long range orientation. A mixture of simple oxygenated monoterpenes [(–)—fenchone, (–)—pinocamphone, rac. camphor, terpinene-4-ol, borneol, fenchol and verbenone], identified from the frass ofD. micans has been found to be extremely active in a flight windtunnel as a long—range attractant for the predator. The mixture elicited 84 % of the response to larval frass of the prey. Excluding pinocamphone from the mixture did not influence its activity. Also, changing the absolute configurations of some of the components (fenchol, terpinene-4-ol and borneol) did not influence the predators' response. However, the addition of (–)—-terpineol increased the attractivity of the synthetic blend to almost that of larval frass of the prey. Ecological implications of the identified semiochemicals and their use in pest management are discussed. |
| |
Keywords: | specificity predation long-range orientation windtunnel Coleoptera Rhizophagidae Scolytidae Rhizophagus grandis Dendroctonus micans |
本文献已被 SpringerLink 等数据库收录! |
|