环境条件对灰葡萄孢菌菌核萌发的影响

<正>灰葡萄孢菌(Botrytis cinerea)引起的灰霉病可导致植物幼苗猝倒或花朵和果实腐烂,多在冬春季节发生,是保护地蔬菜、水果和花卉生产或储藏过程中一类重要的病原菌。灰霉菌的初侵染主要由菌核或病残体在适宜温湿度时萌发产生的菌丝或孢子侵染植物,关于灰葡萄孢菌的菌丝、分生孢

Effects of environmental conditions on sclerotium germination of Botrytis cinerea

Grey mould, caused by Botrytis cinerea, is one of the most important diseases of vegetables, flowers, and fruits in the greenhouse-grown crops, but the germination conditions and features of sclerotium of B. cinerea have not been reported previously. To control the preliminary infection of B. cinerea, the sclerotium germination on different environmental conditions was measured in this study. The result showed that the germination rate was not decreased when sclerotium were cultured at 50℃ for 12 h or at 55℃ for 4 h. The highest level of germination was detected when inoculated at 57% of the relative water content, while lower germination when waterlogged or less water incubation. The highest value of germination rate was observed at pH 6 in all treatments, while no germination at pH less than 3. In addition, the common fertilizers had no significant effect on the germination of sclerotium. Therefore, high soil temperature treatment and modulation of soil pH value might be the effective ways to reduce the preliminary infection in the greenhouse.