不同黄萎病级对棉花产量及纤维品质的影响

The Influence of Different Verticillium Wilt Grades on Upland Cotton Yield and Fibre Quality

利用３个抗枯耐黄棉花品种（系），在病圃研究了不同黄萎病级对棉花产量及纤维品质的影响。结果表明，不同病级的棉花黄萎病株使单株子棉产量降低４．８２％～８５．６６％，单株结铃数减少３．３８％～８４．０１％，单铃重减轻２．６７％～１６．７４％，在分损失０．８２％～７．５７％。在产量各因素中，单株结铃数受病级影响最大，其次是铃重，再次是衣分。同时建立了各品种病级与单株子棉产量和单株结铃数的直线回归方程。黄萎病主要是对纤维的细度、强力、主体长度及成熟度有明显影响。病株与健株比较，病株纤维细度变细，强力降低，主体长度明显变短。

The influence of different Verticillium wilt grades on thirteen yield and fiberquality components were studied using three cotton varieties resistant to fusarium wilt andtolerant to verticillium wilt.The results indicated that verticillium wilt with differentgrades could reduce the singleplant seed cotton yield by 4. 82%～85. 66%,the single bollweight by 2. 67%～174%, and lint percent by 0. 82%～7. 58%。Of all yield factors,bolls/plant wasthe first greatly influenced by the wilt grades,he single boll weight sec-ondly and lint percent thirdly。 The linear regression equations were established betweenthe wilt grades with seed cotton yield and boll number/plant.Verticillium wilt was obvi-ously influencing the fibre fineness, strength and length of infected plants。