宁夏枸杞炭疽病发生流行的气象条件分析

根据宁夏枸杞主产区中宁县和银川市芦花台园林试验场2000～2004年不同批次的成熟枸杞果实炭疽病病情指数和气象资料,运用主成分分析结合逐步回归方法,分析了宁夏枸杞炭疽病爆发流行的主要气象因子及其影响.结果表明:影响炭疽病发生的气象因子主要是温度和空气相对湿度,其次是风力和降水.在一定温度范围内,温度越高,对炭疽病的发生越不利;空气湿度越大,越有利于枸杞炭疽病的发生.

Analysis of weather condition of epidemic of Colletotrichum gloeosporioides Penz

Based on sampling data from Zhongning county and Luhuatai horticultural farm of Yinchuan city in different dates,weather condition and its influence on epidemic of Colletotrichum gloeosporioides Penz were analyzed by using the method of principal components analysis and stepwise regression.The results showed that temperature and air humidity were key factors which impact on Colletotrichum gloeosporioides Penz epidemic.The second factor was wind and precipitation. The higher the temperature during fruits developing stage of medlar,the slighter the Colletotrichum gloeosporioides Penz occurred.However,the higher the air humidity during fruits developing stage of medlar,the heavier the Epidemic of Colletotrichum gloeosporioides Penz.