Abstract: Curculio denlipes Roelots have brought damage to 82.5 percent of the whole area in south Henan. We have experimented for two periods (six years) on the representative four chestnut plantations in south Henan area in south Henan.By using cultivation prevention method with consists of six parts.ie,adding specific fertilizer to speafic trees,Reinfercing orchard clean, improving on the quality of the soil around the tree′s roots,studying the humidity of the soil which is projecded vertically by the trees tops,m...