Analytical study of control of gall of Cryptomeria and mechanisms of hypertrophy.

对柳杉纹枯病的发生情况进行了调查。从2003年5月到2004年11月，记录了柳杉上9个直径为1.2-12.2 mm的虫胆的长度、高度和直径，以确定每个月的虫胆发育速度。结果表明，柳杉的虫害发育速度为0.14~0.52 mm/月。柳杉的树叶和枝条都有虫害。人们注意到，当枝条上的虫害数量很多时，在叶片上也观察到了同样的现象。枝条上的鳞片大小为5~20 mm，叶片上的鳞片大小为10 mm，建议在全国范围内或大规模调查柳杉的鳞片，以确定病情的严重程度。这种疾病通常没有得到检查，在没有真正了解疾病现状的情况下，肉眼看起来很少。瘤内形成了囊孢子。因此，子囊孢子的分离和相关的生物测定研究对于研究病原菌的生物学是必要的，这是建立该疾病的害虫控制技术所必需的。此外，关于胆汁中植物激素的分离，肥大的机制还需要阐明，为今后进一步的相关研究提供参考。

A survey on the occurrence of Cryptomeria gall disease was conducted. The length, height, and diameter of nine galls present on Cryptomeria measuring 1.2-12.2mm were recorded from May 2003 to November 2004 to determine the rate of gall development per month. Results indicated that gall development on Cryptomeria was 0.14-0.52mm/month.Gall present on the leaves and branches of six Cryptomeria tree was investigated. Galls were both present in the leaves and branches of Cryptomeria trees. It was noted that when the number of galls in the branches was numerous, the same observation was noted on the leaves. Sizes of the galls found on the branches range from 5〜20mm while 10mm was recorded on the leaves.It is recommended, that a large scale or nationwide survey on the gall disease of Cryptomeria should be undertaken to determine the extent of the disease. The disease is often left un-checked and visually seen as few without really understanding the current state of the disease.Ascospores are formed inside the galls. Hence, isolation of the ascospores and related bio-assay studies is necessary to study the biology of the causal organisms necessary for the establishment of pest control technology of this disease. Furthermore, elucidation of the mechanism of hypertrophy, concerning the separation of the phytophormone inside the gall is needed as reference for further related researches in the future.