Abstract
The objective of this work was to evaluate the field attractiveness of Thyanta perditor synthetic sex pheromone-baited traps, its attractivity to other stink bug species, and the response of T. perditor to a geometric isomer of the sex pheromone. Two-liter transparent plastic bottles traps were baited with rubber septa impregnated with the treatments: 1 mg of methyl-(2E,4Z,6Z)-decatrienoate [(2E,4Z,6Z)-10:COOMe], the male sex pheromone of T. perditor; 1 mg of (2E,4Z,6Z)-10:COOMe protected from sunlight in standard PVC plumbing pipe; 1 mg of its geometric isomer [(2E,4E,6Z)-10:COOMe]; and traps with rubber septa impregnated with hexane (control). The experiment was carried out in field during the soybean reproductive stages. Traps were monitored weekly, and the captures were compared to the population density estimated by the sampling cloth and visual inspection monitoring techniques. Traps baited with the sex pheromone, protected or not, were more effective in capturing T. perditor than traps baited with the isomer or the hexane. Thyanta perditor sex pheromone showed cross-attraction to other stink bug species, such as Euschistus heros, Edessa meditabunda, Piezodorus guildinii and Nezara viridula. Pheromone-baited traps can be used in population monitoring and to identify the relative composition of stink bug guilds.
Highlights
Stink bugs are the most important soybean pest in Brazil and other countries of South America
America and some states of the United States, such as Florida, Texas and Arizona (Panizzi et al, 2000), is a species of the soybean stink bug guild that may be found in other crops, such as wheat, rice, sorghum and sunflower, where it may feed on seeds (Malaguido & Panizzi, 1998; Panizzi et al, 2000)
The mean number of T. perditor adults captured during the experiment were significantly different (p
Summary
Stink bugs are the most important soybean pest in Brazil and other countries of South America. America and some states of the United States, such as Florida, Texas and Arizona (Panizzi et al, 2000), is a species of the soybean stink bug guild that may be found in other crops, such as wheat, rice, sorghum and sunflower, where it may feed on seeds (Malaguido & Panizzi, 1998; Panizzi et al, 2000) In soybean, this species is as a secondary pest (Panizzi et al, 2000), and may reach high population levels in the central. More than 4x106 L of insecticides are used annually in Brazil to control this soybean pest (Corrêa‐Ferreira & Moscardi, 1996), and the indiscriminate use of insecticides has negative impacts on the economy, environment and human health
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