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2003年8～10月我国棉花棉铃病害在黄河流域棉区暴发为害,发生面积大,持续时间长,为害损失严重。主要原因是8～10月间,黄河流域出现数十年不见的连续秋雨和低温寡照,导致多种棉花铃病严重发生,同时棉花黄萎病伴随出现,严重田块在9月初已有1/3～1/2的棉铃被害,甚至出现往年罕见的顶部棉铃也被害的现象,导致棉花严重减产。根据2004年我国,尤其是黄河流域棉区,仍以抗虫棉为主的现实,我们认为棉铃病仍然将是为害棉花生产的一个威胁。
From August to October in 2003, the cotton boll disease in China was damaged in the cotton area of the Yellow River basin. The occurrence area was large, the duration was long, and the damage was serious. The main reason is that from August to October, there were consecutive autumn rains and low temperature sunshine appeared in the Yellow River valley for several decades, which led to serious occurrence of cotton bollworm disease. At the same time, the emergence of cotton verticillium wilt appeared. 3 to 1/2 of the cotton bolls were killed, and even the rare top cotton bolls that were hit in previous years were also killed, leading to serious cuts in cotton production. According to the reality that insect-resistant cotton is still the main cotton-growing area in China in 2004 and the Yellow River basin in particular, we believe that bollworm disease will still be a threat to the cotton production.