简单地用网线（纱窗，防虫网）盖住排水孔就够了。
Simply use a piece of screen wire to cover the drainage hole.
防虫网对西瓜主要害虫黄守瓜、菜青虫的控制效果为100%，蚜虫的控制效果为80%。
The prevention effect of fly nets above watermelon against yellow melon leaf beetles, cabbage caterpillars and aphids were 100%, 100% and 80% respectively.
通过实验研究了防虫网对报警迟滞时间的影响程度，提出了根据环境合理选择点型感烟探测器的方法。
Studies the influence of mask on lag time, and introduces the optimize method of the usage of point fire detector based on the character of environment.
结果表明，利用防虫网可以有效控制罗汉果病毒病的感染及其传播，采取化学调控措施可以促使罗汉果提早现蕾开花，提高罗汉果植株现蕾率和产量。
It was founded that the preventing insect nets could effectively control the virus infection and spreading. The chemical control could promote the appear of blossoms and increase yield of plants.
结果表明，利用防虫网可以有效控制罗汉果病毒病的感染及其传播，采取化学调控措施可以促使罗汉果提早现蕾开花，提高罗汉果植株现蕾率和产量。
It was founded that the preventing insect nets could effectively control the virus infection and spreading. The chemical control could promote the appear of blossoms and increase yield of plants.
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