A supplemental component of aggregation attractant pheromone in the bean bug Riptortus clavatus (Thunberg) (Heteroptera: Alydidae), related to food exploitation

Abstract

Traps baited with dried soybeans and a synthetic aggregation attractant pheromone were more effective than traps baited with synthetic aggregation pheromone alone against the bean bug, Riptortus clavatus. Dried soybeans alone did not attract bean bugs, so this difference was not due to the attractiveness of the dried soybean itself. The known components of the aggregation pheromone were detectable only in extracts of a few individual attracted bugs; however, all the attracted male bugs had (E)-2-hexenyl hexanoate, which has been identified as an alarm pheromone in this species. This component was present in higher amounts in extracts of male or female R. clavatus that had been fed on soybeans than that of starved males or females. In the experiments, the attractiveness of tetradecyl isobutyrate, which is an essential component of aggregation pheromone, was increased by the addition of (E)-2-hexenyl hexanoate. These results suggested that (E)-2-hexenyl hexanoate is one of the components of the attractant aggregation pheromone of R. clavatus and that it may act as a synergistic composition but not a repellent. It is hypothesized that the pheromonal process related to food exploitation in R. clavatus includes positive feedback since attracted bugs stay to feed at sites and continuously release (E)-2-hexenyl hexanoate.

Pheromone contents and physiological conditions of adult bean bugs, Riptortus pedestris (Heteroptera: Alydidae), attracted to conspecific males during non-diapause and diapause periods in fields

“…In R. pedestris, feeding and attraction to conspecific individuals are closely related (Morishima et al, 2005), suggesting that the pheromone system of R. pedestris plays a key role in food exploitation (Yasuda et al, 2007b). A similar strategy was proposed in the pheromone system of the brownwinged green bug, Plautia crossota stali (P. stali) (Heteroptera: Pentatomidae) (Shiga and Moriya, 1989) and the predatory spined soldier bug, Podisus maculiventris (Heteroptera: Pentatomidae) (Aldrich et al, 1984;Sant'Ana et al, 1997;Shetty and Hough-Goldstein, 1998).…”

“…In R. pedestris, wild males and females attracted to males used as attractants have been found to contain E2-6:Hx, a pheromone component (Yasuda et al, 2007b), suggesting that attracted adults (receivers of the pheromone) of R. pedestris affect the attractiveness of male adults (releasers of the pheromone). Females of R. pedestris used as attractants do not have any pheromone components except for E2-6:Hx, and they are not attractive to conspecific individuals by themselves (Mizutani et al, 2007).…”

Individual variation in the amounts of pheromone components in the male bean bug, Riptortus pedestris (Heteroptera: Alydidae) and its attractiveness to the same species

“…A similar strategy was proposed in the pheromone system of Leptoglossus phyllopus (Heteroptera: Coreidae) (Aldrich et al, 1976) and spined soldier bug Podisus maculiventris (Heteroptera: Pentatomidae) (Aldrich et al, 1984;Sant'Ana et al, 1997;Shetty and Hough-Goldstein, 1998). In R. pedestris, it is considered that the attraction of male and female adults by pheromone is related to food exploitation (Yasuda et al, 2007b). The relationship between the amount of 14:iBu and the degree of fat-body development of males in the present study supported the hypothesis that the release of the pheromone might play a key role in food exploitation.…”

Preference evaluation of stink bugs to leguminous seeds by video tracking system

“…그 가운데 팥바구미에 저항성 유전자를 가진 장안녹두에서 노린재류 의 발육이 현저히 부진한 것으로 밝혀졌으며 (Jung et al, 2006;Bae et al, 2009), 또한 노린재류에 저항성을 가진 콩 유전자원도 보고되었다 (Kaga and Ishimoto, 1998;Piubelli et al, 2005 (Endo et al, 2006;Huh and Park, 2006;Huh et al, 2008;Bae et al, 2010;Alim and Lim, 2011). 노린재류의 집합페로몬은 먹이가 있는 경우 분비함 으로 (Morishima et al, 2005;Huh and Park, 2006), 집 합페로몬과 콩 종실을 조합하면 노린재류의 유인효과가 증 진한다고 하였다 (Huh and Park, 2006;Yasuda et al, 2007). 근년에 Video Tracking System(VTS)를 이용하여 곤충의 행동양상을 보다 정밀하게 관찰하는 연구가 활발하 게 이루어지고 있다 (Noldus et al, 2002;Prasifka et al, 2010) 에 차이가 있다 (Oh, 2008).…”