不同品种棉花对立枯丝核菌抗性的测定

Detection of Resistance of the Cotton Varieties to Rhizoctonia solani

通过盆栽试验和田间试验证明 ,棉花不同品种对立枯丝核菌的抗性存在明显差异。新陆早 10号、夏 9和 15 0 1这 3个品种或材料对立枯病的抗性较差 ,中 35、中 36、新陆早 12号、新陆早 9号、新陆早 13号等品种对立枯丝核菌的抗性较强。故前者早播若遇持续低温常造成较大面积烂籽、烂芽和死苗 ,而后者适时早播一般所受损失较小。

Aabstract Based on pot experiment and field experiment,the result showed: there is significant difference of resistance of the cotton varieties to Rhizoctonia solani. Resistance of the cotton varieties of Xinluzao No.10,Xia nine and 150-1to Rhizoctonia solani were most susceptible, Resistance of the cotton varieties of 'CCRI35', 'CCRI36', Xinluzao No.12, Xinluzao No.9 Xinluzao No.13 had high levelds.The former which was sowed early and attacked by continuous low temperature resulted in often rotted seeds ,sprouts and dead seedling ,while the latter which was suitable sowed early reduced usually the losses.