一、存在问题第一，品种多、乱、杂。据种子部门估计：经过审（认）定合法推广的品种约占1／3；从外地引进的约占1／3；未经审（认）定自行种植的约占1／3。有的县10～20万亩棉田，品种多达6～7个，以致主次不分，优劣难辨，加速了良种的机械混杂和种性退化。第二，随黄枯萎病 First, there are problems First, more varieties, chaos, miscellaneous. According to the seed sector estimates: after the trial (recognized) legally promoted varieties accounted for about 1/3; imported from the outside about 1/3; unedited (recognized) set about one-third of self-cultivation. Some counties 10 to 200000 acres of cotton fields, as many as 6 to 7 varieties, so that the primary and secondary distinction, the advantages and disadvantages are hard to distinguish, speeding the thoroughbred hybrid and species degeneration. Second, with yellow blight