在湖北恩施从马铃薯上采集到一种叶斑病,病原菌鉴定为Mycovelosiela(Cer-cospora)concors(Casp.)Deighton,经文献检索该病害为湖北省内新记录。初步调查,马铃薯灰斑病(M.concors)在个别品种上零星发生。
A leaf spot was collected from the
A modified two-sphere model of sintering neck has been proposed, wherein three diffusion mechanisms including surface diffusion, grain-boundary diffusion and co