温度和寄主植物对瓢虫柄腹姬小蜂自身干扰反应的影响

研究了温度和寄主植物与寄生蜂密度对瓢虫柄腹姬小蜂PediobiusfoveolatusCrawford功能反应的影响。结果表明瓢虫柄腹姬小蜂对自身密度的干扰反应均符合Watt所提出的模型(A =aP-b)。在1 9～3 1℃5个温度下,以2 8℃下的干扰系数最小,其模型为A =4 0 4p-0 41。在4种寄主植物枝叶上,以酸酱枝叶上干扰系数最大,为0 . 5 0 ;而在西红柿枝叶、龙葵枝叶、茄枝叶上分别为0 . 2 8,0 .2 6,0 .2 4。可为合理地利用该蜂提供参考。

Influence of temperature and host plants on interference responses of Pediobius foveolatus

Influence of temperature and host plants on interference responses of Pediobius foveolatus Crawford was studied in the laboratory. The interference response of P. foveolatus to conspecific density was fitted very well to the model A=ap~-b at all conditions tested. At five constant temperatures in the range of 19～31℃, the minimum interference coefficient occurred at 28℃, and the data at this temperature was fitted to the equation A=4.04p~-0.41 . When tested with foliage of four different plants, the maximum interference coefficient (0.50) occurred on Physalis alkekengi L. var. francletii (Mast) Mak., and those on Lycopersicon esculentum Mill, Solanum melongena L. and Solanum nigrum L. were 0.28,0.26 and 0.24 respectively.