1. Timely clear away fungi sack of Pleurotus geesteranus, roots, residues and all kinds of garbage in greenhouse, put an end to places where are suitable for the livings of mosquitoes and flies.
2. After clearing away all garbage and residues, people could evenly spray lime powder and sterilize in mushroom greenhouse, especially pay attention to the corners.
3. People could roll up coverings of mushroom greenhouse such as plastic film and shading net, open windows and door, keep air flowing of greenhouse and utilize low temperature difference of winter to kill mosquitoes and flies.