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Title: Field capture of Thyanta perditor with pheromone-baited traps and cross-attraction to other pentatomids

Author
item LAUMANN, R.A. - EMBRAPA GENETIC RESOURCES
item BLASSIOLI, M.C. - EMBRAPA GENETIC RESOURCES
item KHRIMIAN, ASHOT
item BORGES, M. - EMBRAPA GENETIC RESOURCES

Submitted to: Pesquisa Agropecuaria Brasileira
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/15/2011
Publication Date: 2/1/2011
Citation: Laumann, R., Blassioli, M., Khrimian, A., Borges, M. 2011. Field capture of Thyanta perditor with pheromone-baited traps and cross-attraction to other pentatomids. Pesquisa Agropecuaria Brasileira. 46(2):113-119.

Interpretive Summary: Insect pests cause a significant damage to crops and forest, and monitoring their populations greatly aids reducing pesticide use and biological control. Pheromones, or chemicals that trigger a natural behavioral response in another member of the same species, are commonly used as baits for sampling insect populations. The neotropical red-shouldered stink bug is a species of the soybean stink bug complex inhabiting northern South America, Central America and some of the United States, including Florida, Texas and Arizona. However, this bug can also damage other important crops, such as wheat, rice, sorghum and sunflower. Scientists at USDA-ARS developed an efficient synthesis of the pheromone of the neotropical red-shouldered stink bug, which was tested in Brazil. Our results demonstrated that traps baited with the new synthetic pheromone were significantly better than control traps and, hence, are suitable for monitoring populations of the neotropical red-shouldered stink bug. The results of this study are of interest to chemists and entomologist involved in the research of potential pest control compounds, and to State and Federal agencies (both in the U.S. and Brazil) involved in monitoring and controlling insect pests of agriculture and forest.

Technical Abstract: In Brazil, Thyanta perditor is one of the stink bugs attacking soybean and also could be found on others crops such as wheat, sunflower and sorghum. The objective of this work was to test the field attractiveness of traps baited with synthetic T. perditor pheromone. Two-liter transparent plastic soft drink bottles served as traps and were baited with rubber septa impregnated with the following treatments: 1mg methyl-(E2,Z4,Z6)-decatrienoate ((E2,Z4,Z6)-10:COOMe), the male sex pheromone of T. perditor, non-protected or protected in standard PVC plumbing pipes from sunlight; 1 mg of their geometric isomer (E2,E4,Z6)-10:COOMe; and hexane as a control. The experiment was performed in a soybean field during the soybean reproductive stages. Traps were monitored every week and the captures were compared to the population density estimated by the sampling cloth and visual inspection monitoring techniques. Traps baited with (2E,4Z,6Z)-10:COOMe protected and non-protected, were more effectives in capturing T. perditor than traps baited (E2,E4,Z6)-10:COOMe or control traps. The T. perditor pheromone traps also showed cross-attraction to other species of stink bugs such as Euschistus heros, Edessa meditabunda, and Piezodorus.