Hongyan Ma

Horticulture College, Northeast Agricultural University
Vegetable Department
59 Mucai St Xiangfang Dist
Harbin China 150030

Papers:
Effect of Tillered-Onion (A.cepa var.agrogatum Don.) Bulb Extraction On Watermelon Fusarium Oxysporum and the Control Efficacy in Greenhouse Physiological Races Identification of Powdery Mildew On Cucurbits in Heilongjiang Province