| 摘要 |
<p>Annoying insects are controlled by attaching an insect control device to the body of the animal to be treated. The insect control device is a molded article, preferably in the form of an ear tag, which has been formed from a mixture of fenthion and polyvinyl chloride. In a preferred embodiment, the fenthion is used in combination with coumaphos. The fenthion is generally used in an amount such that it represents from about 5 to about 30 wt% of the insect control device. When used in combination with coumaphos, the fenthion is generally present in an amount of from about 5 to about 30 wt% and coumaphos is generally used in an amount such that from about 5 to about 30 wt% of the device is coumaphos. A plasticizer is not required to make the insect control device of the present invention but such plasticizer may optionally be used. Other materials such as lubricants, pigments, stabilizers, etc. may also be included in minor amounts. The device may be formed by any appropriate technique but injection molding has been found to be particularly advantageous.</p> |
