Abstract

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Title:: Evaluation of Different Rootstocks Resistance to Watermelon Fusarium Wilt

Author(s):: YE Yunfeng1; 2; QIN Sihua2; FU Gang3; HONG Rixin2; LIU Tangjing2; HUANG Jinyan2; (1.Guangxi Key Laboratory of Crop Diseases and Pests Biology,Nanning,Guangxi 530007;2.Horticultural Research Institute,Guangxi Academy of Agricultural Sciences,Nanning,Guangxi 530007；3.Plant Protection Research Institute,Guangxi Academy of Agricultural Sciences,Nanning,Guangxi 530007)

Keywords:: rootstock; watermelon Fusarium wilt; physiological race 1; physiological race 2; evaluation of the resistance

Abstract:: For screening rootstocks with high resistance to watermelon Fusarium wilt,21 rootstock varieties resistance to physiological race 1 and 2 of watermelon Fusarium wilt (Fusarium oxysporum) were evaluated.The pathogens were inoculated by root soaking method in seedling stage.The disease resistance was classified according to the value of the disease index.The results showed that 4 gourd varieties including ‘Dazhuang’‘Xuefeng’‘Gourd 1’‘Nanning local gourd’ and 3 pumpkin varieties including ‘Jinpijian’‘Xuetengmu 2’‘Xuezuanjingang’ showed high resistance to race 1 of F. oxysporum.And 5 gourd varieties including ‘Dazhuang’‘Zhuanggen’‘Gourd 1’‘Longan local gourd’‘Nanning local gourd’ and 4 pumpkin varieties including ‘Zhuangshi’‘Jinpijian’‘Xuetengmu 2’‘Xuezuanjingang’ showed high resistance to race 2 of F. oxysporum.All tested wild watermelon resources did not show high resistance or resistance to race 1 and 2 of F. oxysporum.The conclusion showed that the resistance of gourd and pumpkin rootstock to watermelon Fusarium wilt was strong,and the resistance of wild watermelon was weak.