DeVaney J A
Poult Sci. 1986 Mar;65(3):452-6. doi: 10.3382/ps.0650452.
Two tests of mature White Leghorn laying hens with feathers in the "vent area" clipped to less than .5, 1.5, or 2.5 cm in length were compared with unclipped hens to determine the differences in northern fowl mite (NFM) populations following artificial infestation. Weekly mite ratings were recorded for: 1) the total hen's body, 2) only the vent area, and 3) the remainder of the hen's body. In both tests, the mean total NFM populations were progressively greater as the clipped length of the feathers increased for 16 weeks postinfestation. Mean NFM populations in only the vent area were significantly less for hens with feathers clipped to less than .5 cm in both tests. There was no significant increase in NFM populations over the rest of the hen's body as a result of feathers clipped in the vent area. Therefore, it would be possible to control NFM at relatively low levels without the use of pesticides if a method for reducing the length of feathers in the vent area of laying hens could be developed.
将“泄殖腔区域”羽毛剪至长度小于0.5厘米、1.5厘米或2.5厘米的成年白来航蛋鸡与未剪羽的蛋鸡进行了两项试验，以确定人工感染后北方鸡螨（NFM）数量的差异。每周记录螨的评级，包括：1）母鸡的整个身体；2）仅泄殖腔区域；3）母鸡身体的其余部分。在两项试验中，感染后16周内，随着羽毛剪短长度增加，平均总NFM数量逐渐增多。在两项试验中，羽毛剪至小于0.5厘米的母鸡，仅泄殖腔区域的平均NFM数量显著较少。泄殖腔区域羽毛修剪并未导致母鸡身体其他部位的NFM数量显著增加。因此，如果能开发出一种减少蛋鸡泄殖腔区域羽毛长度的方法，就有可能在不使用杀虫剂的情况下将NFM控制在相对较低的水平。
