棉花早衰在本地系指未开絮之前棉叶就干枯脱落的现象。朝阳属北方特早熟棉区，近几年棉花早衰日益严重，已威胁到棉花产量。１９９６年发病面积占１／３，１９９７年发病面积占１／２。１９９８年由于雨水充足，发病明显减少，但仍有１／１０面积。如何治理早衰，已成为亟... Premature aging in cotton refers to the local cotton did not open before the dry off the phenomenon of cotton leaves. The sun is a particularly early cotton area in the North, in recent years, cotton growing worse, has threatened cotton production. The incidence of disease in 1996 accounted for 1/3, the incidence of disease in 1997 accounted for 1 / 2. In 1998 due to adequate rainfall, significantly reduced incidence, but still 1/10 area. How to treat premature aging, has become urgent ...