Nangáyo F L O, Hill M G, Wright D J
Kenya Agricultural Research Institute, National Agricultural Research Centre, Muguga, P.O. Box 30148, Nairobi, Kenya.
Bull Entomol Res. 2002 Dec;92(6):499-506. doi: 10.1079/ber2002202.
This study was carried out to establish the extent to which an invasive stored products pest, Prostephanus truncatus Horn exploits wood as a feeding and breeding resource in Kenya. Twenty seven out of 84 native and agroforestry trees and shrubs supported the breeding of P. truncatus under laboratory conditions. Adult survival (<1% to 18%) for 8 weeks was recorded on 51 tree species that did not support breeding. The breeding success of this beetle varied widely between host tree species and showed no obvious trends based on tree systematics or wood hardness. Studies of P. truncatus survival on two host tree species found that the greatest increase in the P. truncatus population occurred on stem sapwood, whilst the smallest population increase was on twigs. Breeding also varied greatly from season to season; studies on ten selected host species showed that reproduction was often greatest in wood samples collected and tested during the dry season in September. The implications of these findings for the management of P. truncatus infestations in farm stored maize are discussed.
开展本研究是为了确定入侵性仓储害虫——咖啡豆象（Prostephanus truncatus Horn）在肯尼亚将木材作为取食和繁殖资源的利用程度。在实验室条件下，84种本土树木和农林灌木中有27种能支持咖啡豆象繁殖。在51种不支持繁殖的树种上记录到了8周内成虫的存活率（从<1%到18%）。这种甲虫在不同寄主树种上的繁殖成功率差异很大，且基于树木分类学或木材硬度未表现出明显趋势。对咖啡豆象在两种寄主树种上存活情况的研究发现，咖啡豆象种群数量增加最多的是在树干边材，而增加最少的是在嫩枝上。繁殖情况在不同季节也有很大差异；对10种选定寄主树种的研究表明，9月旱季采集并测试的木材样本中的繁殖率通常最高。文中讨论了这些发现对农场仓储玉米中咖啡豆象虫害管理的意义。
