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板栗枝干疙瘩好发于春天， 严重影响幼龄嫁接板栗植株的生长。采用野外调查、病原物分离培养和接种的方法， 查明板栗枝干疙瘩的发生原因有小蠹虫危害、林地排水透气不良以及嫁接口愈合不好等， 以小蠹虫危害最为常见。图１ 参１
Chestnut branches pimples occur in the spring, seriously affecting the growth of young grafted chestnut plants. Field investigation, pathogen isolation and culture and inoculation methods were used to find out the causes of chestnut stem lumps were the damage of bark beetle, the poor ventilation of woodland drainage, and the poor healing of barking. Figure 1 Senate 1