DDVP缓释剂熏杀长尾黄鼠寄生蚤的实验研究

以DDVP缓释剂药丸在实验室及野外对不同变态期的长尾黄鼠寄生蚤进行了杀灭试验。在实验室DDVP缓释剂药丸对长尾黄鼠寄生蚤的卵、幼虫、成蚤的杀灭率均为100％,蛹为90％;在野外,将该药丸投放于长尾黄鼠洞道中,施药面积约10公顷。施药后,体、巢蚤指数及其幼虫指数出现了明显的下降,即实验区的平均体蚤、巢蚤、幼虫指数分别由施药前的5.8、46.7、10.2下降到施药43天后的2.5、2.8、0.8;对照区的体蚤、巢蚤、幼虫指数分别由4.1、20.3、7.3上升或下降到6.8、9.8、5.5。差异均十分显著(P<0.01)。作者认为DDVP缓释剂对长尾黄鼠寄生蚤是一种行之有效的杀虫药物。

AN EXPERIMENTAL STUDY OF THE CONTROL OF FLEAS ON CITELLUS UNDULATUS BY FUMIGATING WITH DDVP SLOW- RELEASING PELLETS

Laboratory and field tests were conducted for the control of fleas on Citellus undulatus in their various metamorphotic stages with DDVP slow-releasing pellets. In laboratorial conditions, the agent caused 100% mortality to the eggs, larvae and adult fleas on C.undulatus, and 90% to the pupae of the fleas, In the open-field test, pellets were exposed in the burrows, a grid encompassing 10 ha was established. There were significant declines in the test plots, the mean indices of fleas on the rodent, in the nests and the larva index dropped from 5.8, 46.7 and 10.2 to 2.5, 2.8 and 0.8 respectively after 43 days exposure, while in the control plots, the same indices changed from 4.1, 20.3, 7.3 to 6.8, 9.8 and 5.5 respectively, with very significant differences (P<0.01). Results indicated that DDVP slow-releasing pellets were very effective for the control of fleas on Citellecs undulatus.