<正>对南方红豆杉（Taxus chinensis var. mairei Lemee et I’evl. Cheng et L. K. Fu）种子各部分的甲醇浸提液进行了生物测定，并通过GC-MS联用仪鉴定，以探讨种子中萌发抑制物质与休眠的关系。结果表明：南方红豆杉种子中种皮、内种皮和胚乳的浸提液对白菜种子发芽率和幼苗的高生长、根生长均有抑制作用，且随浸提液浓度的增大，抑制作用逐渐增强。同时，从南方红豆杉种子的胚乳和中种皮、内种皮中鉴定出多种有机化合物，并确定了它们的种类和相对含量，其中包括已报道的正庚酸、壬酸、乙酸等发芽抑制物质。表明南方红豆杉种子的中种皮、内种皮和胚乳中均含有抑制种子萌发和幼苗生长的物质。

The damage of Ricania sublimbata Jacobi on twigs in Jiangsu Province was reported for the first time in this paper, 96 species of host trees have been found out by investigation in Zijinshan National Forest Park. Among of them, 74 species of the host trees were new records on the insect. The resistance sequence of host trees on R. sublimData Jacobi was put forward based on the nidus length and the egg production. The oviposition behavior of female adult caused serious damage on the host trees. The average growth inhibitory rate of the shoot with nidus was 26.9%. The spacial distribution pattern of nidi of overwinter eggs belonged in aggregation distribution on the shoots of host trees. The nidi located on the sou then or easten shoots of crown were more then those on westen or northen shoots. There wasn’t any significantly difference between the nidus number located on the upper or the lower shoots of crown. The water content of shoot and the length of nidus were highly correlated with the hatching rate of overwinting eggs.