1. Get rid of fungi sacks, roots, residues of Pleurotus geesteranus and all kinds of wastes in greenhouse as soon as you find them, put an end to the places where fit for the breeding of mosquitoes and flies.
2. After clearing away all the wastes and residues in the greenhouse, you could evenly spray lime powder and sterilize in mushroom greenhouse, especially pay attention to the corners.
3. It is practicable to roll up the coverings in mushroom greenhouse including plastic films and shading nets, then open windows and doors, keep air flowing of greenhouse and utilize low temperature differences in winter to kill mosquitoes and flies.