Isolation trials were carried out from wilt green bean plants showing typical symptoms of damping-off. Samples of crew ford variety were collected from farms located at Fayoum and Giza govemorates. associated with the tow fungivorus mite Kleemannfa kosi and Proctolaefaps pygmaeus Some of plants diseases may be controlled by using soil mites which are normally considered fungivores mites. The two fungi Sclerotium bafatfcola and Rhizocionia solani, were isolated from naturally plants of green been associated with the tow fungivorus mite Kleemannia kosr‘ and Proctolaelaps pygmaeus Laboratory studies revealed the ability of two mite species collected from green bean debris. root and soil. K. frost and P. pygmaeus. to feed and propagate on the growth of the two different fungal species. Soil application of each mite species alone or together beside fungus Trichoderma harzianu was successful as a biocontrol technique against green bean root-rot and seedling-off disease.