大豆褐纹病在黑龙江省东部地区于 6月中旬始见病斑 ,始发病期与当时气象因素有关。病情在 6月下旬至 7月中旬增长较快 ,在 7月下旬至 8月上旬增长较慢 ,8月中旬至 9月初迅速增长 ,9月中旬以后病情逐渐趋于稳定。耕作栽培措施对病害流行有一定影响。病害流行程度主要取决于6月 2 0日至 8月 31日的气象条件 Soybean brown spot disease in the eastern region of Heilongjiang Province in mid-June saw lesions, the onset period and the meteorological factors. The condition increased rapidly from late June to mid July, and slowed from late July to early August, rapidly from mid August to early September, and gradually stabilized after mid-September. Tillage cultivation measures have a certain impact on the epidemic. The prevalence of the disease mainly depends on the weather conditions from June 20 to August 31