云南省华山松腐烂病病原学初步研究 Ⅱ 病原生物学特性

A Preliminary Study on Valsa Canker of Armand Pine in Yunnan A Study on the Biological Features of the Pathogen

病原菌生物学特性研究表明：温度对松黑腐皮壳子囊孢子萌发的快慢有影响，以２５℃为好，但５～３０℃范围内，６０ｈ最终萌发率均可达８０％以上；相对湿度必须达１００％，孢子才能萌发；ｐＨ值３～８孢子都可以萌发，以ｐＨ为５萌发率最高；全光照与持续黑暗的萌发率相近．分生孢子，在各种实验条件下无一萌发．

The studies on the biological feature of the pathogen showed that the optium temperature, humidity, nurture and medium pH of ascospore germination are 25,100%RH,PDA and pH50 respectively. Darkness is beneficial to spore germination. However, conidia can not germinate unless a lot of conidia gather together.