Studies on Culture and Propagation of Virus Elimination Seedings from WelshOnion Shoot-tip A New Welsh Onion Cultivar‘Xincong 2’ Colchicines Induced Polyploid Plants and Identification in Welsh Onion A New Welsh Onion Cultivar‘Anshu Tieganwang’ Allelopathy of Welsh Onion Root Exudates on Cucumber Seed Germination and Fusarium oxysporum f. sp. cucumerinum and the GC–MS Analysis Allelopathy of Welsh Onion Root Exudates on Cucumber Seed Germination and Fusarium oxysporum f. sp. cucumerinum and the GC–MS Analysis Changes of Endogenous Hormones During the Process of Flower Bud Differentiation of Welsh Onion Colchicines Induced Polyploid Plants and Identification in Welsh Onion A New Welsh Onion Cultivar‘Xincong 2’ Changes of Endogenous Hormones During the Process of Flower Bud Differentiation of Welsh Onion A New Welsh Onion Cultivar‘Anshu Tieganwang’