板栗（ＣａｓｔａｎｅａｍｏｌｉｓｓｉｍａＢｌ．）球果在生长发育期间，因桃蛀螟、栗皮夜蛾、栗实腐病为害及落果原因，每年都要损失幼果、果苞及成熟期栗实２５％～８０％。桃蛀螟多发生在８月中旬果期至９月下旬熟果阶段，脱粒后仍有为害栗实现象；栗皮夜蛾为害发生在７月幼果期和８月中旬的果期阶段；栗实腐病为害发生在９月中下旬的熟果期阶段；落果发生在７～８月份的幼果期和果期阶段。本文分析了幼果期、果期和熟果期球果损失的主要因子和损失程度，并提出了有针对性的防治对策 During the growth and development of coniferous chestnut (CastaneamolissimaBl.) Conchocelis, chestnut skin insects, chestnut solid rot damage and fruit drop causes, annual loss of young fruit, fruit buds and mature chestnut 25% to 80% . Blight borer occurred in mid-August fruit period to the end of September cooked fruit stage, after threshing is still harmful to the phenomenon of chestnut; Noctuidae harm occurs in the juvenile fruit stage in July and mid-August fruit stage; chestnut Real rot disease occurs in mid-late September mature fruit stage; fruit drop occurred in July and August of the young fruit and fruit stage. In this paper, we analyzed the main factors and loss of the loss of cones in young fruit stage, fruit stage and ripe fruit stage, and put forward some countermeasures