龟纹瓢虫对3种果树害虫的捕食作用研究

FUNCTIONAL RESPONSES OF PROPYLAEA JAPONICA (THUNBERY) TO THREE FRUIT TREE PESTS

本文测定了龟纹瓢虫Ｐｒｏｐｙｌａｅａｊａｐｏｎｉｃａ（Ｔｈｕｎｂｅｒｙ）成虫对苹果黄蚜ＡｐｈｉｓｃｉｔｒｉｃｏｌａｖａｎｄｅｒＧｏｏｔ、桃粉蚜ＨｙａｌｏｐｔｅｒｕｓａｒｕｎｄｉｎｉｓＦａｂｒｉｃｉｕｓ和梨木虱ＰｓｙｌａｐｙｒｉｓａｇａＦｏｒｓｅｒ的功能反应及其自身的干扰作用。功能反应的模型相应为Ｎａ苹＝０．９９５０Ｎ１＋０．００７６３３Ｎ，Ｎａ桃＝０．９８５２Ｎ１＋０．００９１３８Ｎ和Ｎａ梨＝０．８５０８Ｎ１＋０．００５３９２Ｎ；成虫寻找效应与自身密度的关系可用如下模型描述：Ｅ苹＝０．３１４２Ｐ－０．６４４４，Ｅ桃＝０．４３６２Ｐ－０．７８１３，Ｅ梨＝０．４６５４Ｐ－０．９４９６，表明龟纹瓢虫成虫对这３种果树害虫具有较强的捕食能力。

The functional responses of Propylaea japonica (Thunbery) to Aphis citricola van der Goot. Hyalopterus arundinis Fabricius and Psylla pyrisaga Frser were tested,they belong to Holling Ⅱ,Na=aTN1+aT hN.The models of functional responses of the ladybird to the three pests are as the following:Na=0.9950N1+0.007633N,Na=0.9852N1+0.009138N and Na=0.85081+0.005392N.Under the condition of different preys ,the relationship between searching efficiency and the number of the ladybirds can be quantitatively measured with the following models:E=0.3142p -0.6444 ,E=0.4362p -0.7813 and E=0.4654p -0.9496 ,which indicate that there exists a servere mutual interference and that the ladybirds have great ability of preying the three pests.