| 摘要 |
<p>Method of applying insecticide enables house flies to be killed before they have entered the house. A coating of insecticide is applied to outside of window frames and doors etc, where the insects may perch before entering the house. Pref. the coating contains no hardener, ensuring a prolonged effectiveness. Specif., diethylchloro-oxyethyl phosphonate may be used.</p> |
