5,11-Dimethylheptadecane and 2,5-Dimethyl-heptadecane: Sex pheromone components of the geometrid moth,Lambdina fiscellaria fiscellaiia

Abstract

5,11-Dimethylheptadecane and 2,5-dimethylheptadecane, two previously unknown lepidopteran sex pheromone components, comprise the sex pheromone of the eastern hemlock looper, Lambdina fiscellaria fiseellaria (Guen.) (Lepidoptera: Geometridae). The eastern hemlock looper is found in Canada from Newfoundland to Saskatchewan and from the Lake States to the eastern seaboard of the United States [1]. It is the most important insect pest in Newfoundland, causing an estimated 20 million m 3 of mortality in balsam fir, Abies balsamia (L.) Mill., since 1900. Monitoring with pheromone-baited traps would greatly enhance forecasting of looper outbreaks. We report the identification, synthesis, and field testing of the sex pheromone of the eastern hemlock looper. Experimental insects were laboratoryreared or field-collected near St. John's, Newfoundland. Sexed pupae and moths were kept at 20°C, 70% r.h. and a photoperiod of 16:8 (L:D). Pheromone glands of calling females were excised and extracted in hexane for 2 min. Gas chromatographic analyses on two glass capillary columns (DB-210, DB1) utilizing both flame ionization (FID) and electroantenno-

DOI: 10.1007/BF01221418

Cite this paper

@article{Gries1991511DimethylheptadecaneA2, title={5,11-Dimethylheptadecane and 2,5-Dimethyl-heptadecane: Sex pheromone components of the geometrid moth,Lambdina fiscellaria fiscellaiia}, author={G. Gries and R. Gries and J. H. Borden and Jianxiong Li and K. N. Slessor and G. G. S. King and W. W. Bowers and R. J. West and E. W. Underhill}, journal={The Science of Nature}, year={1991}, volume={78}, pages={315-317} }