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三年试验结果表明,棉花黄萎病在本地最早于5月下旬初发。在6月25日至9月25日之间均可严重发生。相关分析表明,发病早迟和轻重受温湿度综合作用所制约。本地在旬均温23—30℃之间,气温愈高,发病愈轻。通径分析表明,在本地气候条件下,气温和雨日对棉黄萎病发生的直接作用最大,而雨量不表现对棉黄萎病有较大影响。
The results of the three-year trial showed that the first case of cotton verticillium wilt in China started in late May. Between June 25 and September 25 can be serious. Correlation analysis showed that early onset and severity of temperature and humidity by the combined effect of constraints. Local average temperature in the late 23-30 ℃, the higher the temperature, the less the incidence. Path analysis showed that under the local climatic conditions, temperature and rain day had the most direct effect on the occurrence of Verticillium wilt, but the non-performance of rainfall had a greater impact on the occurrence of Verticillium wilt.