Bolls fail to develop properly and many fail to open or open only partially.Poor quality fiber results. 棉铃停止正常发育，并可能不开花或半开，造成纤维品质差。
Under the contiouous efforts of cotton breeders, cotton yield has been greatly improved, other traits such as fiber quality, anti-desease and anti-insects have also been improved. 棉花工作者长期以来面临的挑战是同步提高产量和纤维品质以满足棉花生产者和纺织工业的要求。
