Sustainable Perennial Crops Laboratory, USDA-ARS, Bldg. 001, BARC-W, Beltsville, MD 20705, USA.
J Econ Entomol. 2011 Feb;104(1):87-93. doi: 10.1603/ec10353.
Three experiments were conducted to determine the influence of number of coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae: Scolytinae), females (one, two, or five) reared in artificial diet on fecundity and subsequent development of larvae, pupae, and adults. Our results demonstrated that increasing female density from one to two or five individuals did not result in the expected two- or five-fold increase in progeny, despite ample food resources available. Instead, decreased fecundity was observed with increasing density for all experiments. The mechanism reducing fecundity was not identified, but possibly, volatiles are being produced (e.g., host-marking pheromones). The decrease in fecundity may explain why infestations of only one colonizing female per berry are the norm in the field.
进行了三项实验，以确定在人工饲养的咖啡浆果象甲（Hypothenemus hampei（Ferrari））（鞘翅目：象甲科：象甲亚科）雌虫（1、2 或 5 只）数量的影响，对幼虫、蛹和成虫的繁殖力和随后的发育。我们的结果表明，尽管有充足的食物资源，但雌虫密度从 1 只增加到 2 只或 5 只，并没有导致预期的两倍或五倍的后代增加。相反，所有实验都观察到随着密度的增加，繁殖力下降。降低繁殖力的机制尚未确定，但可能会产生挥发物（例如，寄主标记信息素）。繁殖力的下降可能解释了为什么在野外，每颗浆果中只有一个定植的雌虫是正常现象。
