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大叶黄杨叶斑病在鄂西南地区5月上旬开始出现,5月下旬-7月上旬病害发生较重,6月中旬为第一个发病高峰,9月上旬-10月下旬病害发生再次较重,10月上旬为第二个发病高峰。由坏损尾孢Cercospora destructiva Rav引起,病菌分生孢子在10℃-30℃、相对湿度70%以上、酸性条件均能萌发,以25℃、相对湿度100%、ph4时萌发最好。病害发生与温度、光照、湿度等有关。可用50%多菌灵WP和70%甲基托布津WP800倍液防治。
Soybean leaf leaf spot in the southwest of Hubei began to appear in early May, late May - early July disease occurred heavier in mid-June for the first peak incidence, early September-October late disease occurred again heavier , The second peak in early October. It was caused by Cercospora destructiva Rav. The conidia germinated at 10 ℃ -30 ℃ and relative humidity above 70%, and germinated best under acidic condition at 25 ℃, relative humidity of 100% and ph4. Disease occurs with the temperature, light, humidity and so on. Available 50% carbendazim WP and 70% thiophanate-methyl WP800 times prevention and treatment.