一、使用助壮素或含有助壮素复配剂不当1 .症状　在苗床使用床草净浓度过高或药量过多 ,会使棉苗子叶肥厚、浓绿 ,抽生真叶缓慢。蕾期、花铃期使用助壮素或保铃王浓度过高或药量过多 ,会使棉株叶片变厚、皱缩、变小 ,果枝伸展不开 ,影响蕾、铃的发育。2 .防止措施　使用延缓性 First, the use of mepiquatoside or with mepiquatosidine improper compound 1. Symptoms in the bed using bed grass net concentration is too high or too much dose, will make cotton seedling leaf hypertrophy, dark green, pumping leaves really slow. Bud stage, flower and boll weevil or boll weigher concentration or excessive dose, will make cotton plant leaves thickening, shrinkage, smaller, fruiting branches can not stretch, affecting buds, bell development. 2 Preventive measures to use delay