云南河口地区香蕉褐缘灰斑病的发生规律研究

Occurrence Regularity of Banana Sigatoka Leaf Spot Disease in Hekou of Yunnan Province

对云南河口地区香蕉褐缘灰斑病（BananaSigatokaLeMSpotDisease）进行研究，结果表明：病害的发生、发展规律主要受温度和降雨量的影响；春季气温回升时开始发病，10～11月危害达到高峰值；不同地理环境危害程度有明显差异．病情指数东部地区（11．81）〉中南部地区（10．40）〉西部地区（7．94），但危害的基本规律是低海拔地区比高海拔地区先发病．且发病程度比高海拔地区严重，病情指数随着海拔的升高而降低。

The study is about banana sigatoka leaf spot disease in Hekou of Yunnan province. The findings show that the occurrence and the rule of development of the disease are influenced by temperature and rainfall. The disease begins at spring, when the temperature rises and reaches peak between October and December. The degree of harm of the disease differs greatly between different geographic environments, disease index： eastern district （11.81） 〉 central and southern district （10.40） 〉 western district （7.94） but the basic rule is that the disease in low altitude districts begins earlier than high altitude districts and is more harmful than that of the low districts and the disease index decreased with the rises of altitude, which has certain guiding significance for agricultural production.