The major component of the trail pheromone of the leaf-cutting ant,Atta sexdens rubropilosa forel |
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| Authors: | Dr John H Cross Russell C Byler Uzi Ravid Robert M Silverstein Stephen W Robinson Paul M Baker João Sabino De Oliveira Alan R Jutsum J Malcolm Cherrett |
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| Affiliation: | (1) Department of Chemistry, State University of New York, College of Environmental Science and Forestry, 13210 Syracuse, New York;(2) Ministry of Agriculture Extension Service, San Lorenzo, Paraguay;(3) Nucleo de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro, Centro de Ciencias da Saude, Bloco H 20-000, Rio de Janeiro ZC 32, Brazil;(4) Present address: Department of Applied Zoology, University College of North Wales, LL57 2UW Bangor, Gwynedd, Wales, UK;(5) Present address: Insect Attractants, Behavior and Basic Biology Research Laboratory, Federal Research, Science and Education Administration, USDA, P. O. Box 14565, 32604 Gainesville, Florida |
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| Abstract: | The major component of the trail pheromone of the South American leaf-cutting ant,Atta sexdens rubropilosa Forel, is 3-ethyl-2,5-dimethylpyrazine (II). Methyl and ethyl phenylacetate and methyl 4-methylpyrrole-2-carboxylate (I), which is the major component of the trail pheromone ofA. texana (Buckley) andA. cephalotes (L.), were also identified and may be minor components. The pheromone is stored in the poison gland.Atta sexdens sexdens (L.) also responds strongly to the pyrazine, which in large amounts evokes a weak response fromA. texana, A. cephalotes, andAcromyrmex octospinosus (Reich). Foraging workers ofAtta sexdens rubropilosa did not preferentially pick up baits impregnated with the pyrazine. The pyrazine was puffed into the nests ofA. cephalotes, and a particular response called  milling was noted. |
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| Keywords: | Trail pheromone 3-ethyl-2 5-dimethylpyrazine leaf-cutting ants Atta sexdens Atta cephalotes foraging bait pickup |
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