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Psyche
Volume 2012, Article ID 275128, 6 pages
http://dx.doi.org/10.1155/2012/275128
Research Article

Volatile Chemicals of Adults and Nymphs of the Eucalyptus Pest, Thaumastocoris peregrinus (Heteroptera: Thaumastocoridae)

1Laboratório de Semioquímicos, Departamento de Química, Universidade Federal do Paraná (UFPR), Centro Politécnico, 81531-990, Curitiba, PR, Brazil
2Laboratório de Entomologia Florestal, Embrapa Florestas, Estrada da Ribeira, Guaraituba, 83411 000 Colombo, PR, Brazil
3Invasive Insect and Behavior Laboratory, ARS Biocontrol, USDA, Agricultural Research Center-West, B-007, Room 313, Beltsville, MD 20705, USA

Received 23 February 2012; Accepted 21 April 2012

Academic Editor: Jocelyn G. Millar

Copyright © 2012 Camila B. C. Martins et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Thaumastocoris peregrinus is an introduced “true bug” that is now a severe pest in Eucalyptus plantations of various Southern Hemisphere countries. The semiochemicals of thaumastocorids are completely unknown. Therefore, volatile chemicals from T. peregrinus nymphs and adults were identified as possible leads for pheromones potentially useful for control. The contents of nymphal exocrine glands, which are shed at molting, were identified from extracts of exuviae. Adults lack functional metathoracic scent glands that are characteristic of most heteropterans; however, both males and females possess a glandular-appearing hold-fast organ that they quickly extrude posteriorly when disturbed. Whole body hexane extracts from males and females were prepared by freezing the insects in a flask so that they extruded the hold-fast organ, and then they were extracted with hexane. Volatiles from nymphal exuviae included benzaldehyde, octanol, (E)-2-octenol, octanoic acid, decanal, and hexanoic acid. Adult volatiles included 3-methylbut-2-en-1-yl butyrate and 3-methylbut-3-en-1-yl butyrate.