Alternating insecticides also prevents insects from building up resistance to any one particular method.

In some cases the kura were raised off the ground to prevent vermin and insects from entering.

Many plants exude substances to prevent insects from eating.

Another system would spray washing fluid over wing skin while a plane was climbing, thereby preventing insects from sticking.

The cover also prevents insects and dust from getting into the house/room.

But when the entire system is shut down, close the outdoor faucets to prevent insects or other pests from entering the plumbing.

The wind coming in off the sea kept the temperature down and prevented insects from becoming a major nuisance.

This type of garden sanitation prevents insects and disease spores from surviving over the winter.

The vile stuff prevented insects from bothering her, and in this tropical climate, they were thick as, well, flies.

Finer meshes have been developed to prevent very small insects, often called "noseeums" from flying through.