丁纹豹蛛对棉田多种猎物的选择效应

THE SELECTIVITY OF SPIDER PARDOSA T-INSIGNITA(BOES ET STR.)ON MULTIPREY SPECIES IN COTTON FIELD

在接近自然的控制条件下,研究了丁纹豹蛛对棉蚜、棉小造桥虫2、3龄幼虫和棉叶蝉共存时的捕食效果。结果表明:丁纹豹蛛对棉蚜和棉叶蝉不存在喜好性;对棉小造桥虫2、3龄幼虫存在着负喜好性;其喜食性与猎物数量无关,属随机捕食。

Under appraximate natural control conditions the capture effect of Pardosa T-insignita on the Aphid gossypii,Anomis flava instar 2 and 3 and Chlorita bigutt- ula which they present in the space was studied.The results showed that it is not preference to the Aphid gossypii and Chlorita biguttula,To Anomis flava instar 2 and 3 present negative preference.Preference to the prey is not related to density of the prey.Capture to the prey is random.