Objective To understand the field rat repellingeffect with the ultrasonic rat repellent and provide scientific data for rat prevention in special environments.
目的了解超声波驱鼠器现场驱鼠效果，为特殊环境防鼠提供科学依据。
2
Repellingeffect was studied by using pour-sprinkling preparation of eprinomectin in yaks infected with Hypoderma larvae, eprinomectin injection and not giving drug as control group.
应用埃普·利诺菌素浇泼剂驱除牦牛皮蝇幼虫，并设埃普·利诺菌素注射剂药物对照组和阳性对照组。
3
These troughs are covered with a waxy water-repelling substance which has the effect of rolling the droplets down the beetle's inclined body and into its mouth.