Abstract: Recent investigations have shown that all the chestnuts will die out ,120.000 hectares in South Henan,if Endothia Parasitica is out of control for a short period,deadfull soil erosion and deterioration of ecological environment will be caused,too.Based on detailed investigations in diferent orchards,we got some characteristics about the disease and suggest 6 steps to deal with it,i.e.strict test and disinfection of seedlings ,grouth strenghening through reforming soil,lowering density of planting,reinforcin...