襄阳麦区小麦条锈病流行的新特点及影响因子分析

Analysis on the New Features of Wheat Stripe Rust and Its Causes in Xiangyang Wheat Area

襄阳麦区是我国小麦条锈病菌最重要的冬繁区之一,也是我国小麦条锈病由川甘陕向冀鲁豫麦区传播的咽喉和桥梁地带,打好襄阳麦区阻击战对于全国小麦条锈病防控具有重要意义。总结了襄阳麦区近年来小麦条锈病出现的一些新特点,即发生频率明显加快、为害高峰期提前、传播途径出现新变化、暴发性更强;从品种抗性、菌源基数以及气候条件等方面对其成因进行了分析。

Xiangyang is not only one of the major winter reproduction areas of wheat stripe rust,but also the channel and bridge area for wheat stripe rust difusing from Sichuan,Gansu and Shaanxi to Hebei,Shandong and Henan.Blocking wheat stripe rust in Xiangyang area has great significance for preventing and controlling this disease in China.The emergence of some new features and the causes of wheat stripe rust in Xiangyang wheat area in recent years were analyzed.It was appeared that some new features of this disease had been shown,including the speeding up of outbreak frequency,advancement of peak damage period,new variety of the prevalence pathway,and stronger fulminating.The causes were analyzed through the aspects of varieties resistance,pathogens and climatic factors.