Hill M G, Hill M G, Nang'ayo F L O, Wright D J
CABI Bioscience Silwood Park, Buckhurst Road Ascot Berkshire SL5 7TA UK.
Bull Entomol Res. 2003 Aug;93(4):299-306. doi: 10.1079/ber2003247.
The establishment of the predatory histerid beetle, Teretrius nigrescens Lewis, following its field release in south eastern Kenya in 1992, and its impact on populations of the larger grain borer, Prostephanus truncatus (Horn), in woodland habitats is evaluated. Pheromone trap catch data show a single strong peak of P. truncatus from November to January, coincident with the short rains. Comparisons of P. truncatus pheromone trap catches before and after predator establishment, and in areas with and without T. nigrescens, show a sustained decline of over 80% in P. truncatus abundance over a 5-year period, following the establishment T. nigrescens. Concurrent laboratory studies of the impact of T. nigrescens on populations of P. truncatus raised on a wood substrate showed a 77% reduction in the growth of the pest population. These results are compared with published findings of the impact of T. nigrescens as a biological control agent of P. truncatus in west Africa.
对掠食性阎甲Teretrius nigrescens Lewis于1992年在肯尼亚东南部野外释放后定殖情况及其对林地生境中玉米象Prostephanus truncatus (Horn)种群的影响进行了评估。性诱捕器诱捕数据显示，玉米象在11月至1月有一个单一的高峰，与短雨期重合。比较捕食者定殖前后以及有和没有黑胫突眼隐翅虫区域的玉米象性诱捕器诱捕量，结果表明，在黑胫突眼隐翅虫定殖后的5年期间，玉米象数量持续下降了80%以上。同时，在实验室研究黑胫突眼隐翅虫对以木材为基质饲养的玉米象种群的影响时发现，害虫种群的增长减少了77%。将这些结果与已发表的关于黑胫突眼隐翅虫作为西非玉米象生物防治剂的影响的研究结果进行了比较。
