Author： KAAE R. S. SHOREY H. H. McFARLAND S. U. GASTON LYLE K.
Publisher： Entomological Society of America
ISSN： 1938-2901
Source： Annals of the Entomological Society of America, Vol.66, Iss.2, 1973-03, pp. : 444-448
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Abstract
With few exceptions, pheromone-releasing females of each of 10 species of Noctuidae mainly attracted males of their own species in the field. The greatest degree of interspecific pheromone communication occurred between species found in the same subfamily (Plusiinae, Heliothinae, or Phalaeniinae). Interspecific pheromone communication between Trichoplusia ni (Hübner), Autographa californica (Speyer), A. biloba (Stephens), Pseudoplusia includens (Walker), and Autoplusia egena (Guenée) (Plusiinae) was studied in detail. There was no cross attraction between A. egena adults and adults of the 3 other plusinne species (T. ni, A. California, P. includens) with which they were compared. A. egena males were strongly attracted to cis-5-dodecenyl acetate in the field. They were not attracted to cis-7-dodecenyl acetate, which is the sex pheromone of T. ni and P. includens, and apparently of A. California. Traps baited with A. California females caught few males of T. ni and no males of P. includens. Also, females of the latter 2 species did not attract males of A. California. This lack of cross attraction may result in part from the fact that A. californica adults typically mate earlier in the night and apparently utilize a smaller quantity of the pheromone in mating communication than do T. ni and P. includens. The greatest degree of interspecific pheromone communication was noted between adults of P. includens and T ni. This phenomenon corresponds with observations that the mating times of these species are similar and that they apparently utilize similar quantities of the pheromone.
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