品种、种植年限等因子对苜蓿白粉病和霜霉病发病影响的初步研究

李克梅;王万林;高俊灵;张辉;卡德尔

Preliminary Research on Influence of Variety, Planting Term,etc.on Alfalfa Powdery Mildew and Downy Mildew

LI Ke-mei;WANG Wan-lin;GAO Jun-ling;ZHANG Hui;Kader

. 2006, (5): 439 -442 .