Pheromonal attraction and allomonal interruption of Ips pini in California by the two enantiomers of ipsdienol

阅读量：

作者：

MC Birch，DM Light，DL Wood，LE Browne，RM Silverstein，BJ Bergot，G Ohloff，JR West，JC Young

展开

摘要：

Air containing volatile compounds from around male Ips pini boring in ponderosa pine logs from California was condensed, fractionated by GC, and assayed in the laboratory and field. The only fraction that showed consistent activity in laboratory assays contained a single compound identified as ipsdienol (2-methyl-6-methylene-2,7-octadien-4-ol). Synthetic racemic ipsdienol showed no activity in either the laboratory or field. However, ()-ipsdienol, the naturally occurring enantiomer, was attractive to I. pini in the laboratory and field, whereas (+)-ipsdienol interrupted the response of I. pini to a natural source of attraction in field tests. ()-Ipsdienol is a major component of the attractant pheromone of this species, since its level of activity in laboratory assays was quantitatively comparable to that of the condensed volatiles, and it was as attractive as male I. pini boring in ponderosa pine in the field. (+)-Ipsdienol is a component of the pheromone of the competing species, I. paraconfusus .

展开

关键词：

Scolytidae bark beetle Ips pini pheromone ipsdienol enantiomer interruption allomone