大蒜的灰霉病内容摘要:
2、原的无性繁殖体的田间扩大再侵染,冬前和翌春田间有两次发病高峰,以春峰为主。 库藏蒜薹菌源主要来自田间,次为库房内带菌。 该菌喜中温高湿,一般春季多雨,发病重。 冷藏过程中,高温老化和低温冻害的蒜薹,失去抗病力。 库温突升突降,袋内易结露,滴湿蒜薹,引起霉菌感染。 氧气长期低于 1,二氧化碳高于 15%,易至蒜薹二氧化碳中毒,使病菌大量侵害而腐烂。 (3)防治方法农业防治。 (a)选用抗病良种;(b)科学管理肥水。 沟系配套,以利排水降渍,浇水后及时中耕松土;配方施肥,培育壮苗,提高抗(耐)病力。 农药防治。 发病初期,每 667 平方米用 50速克灵可湿粉 40特克多可湿粉、50扑海因可湿粉 1000 倍液,或 40复方多菌灵 8 肋倍液 50匀喷雾,防效良好。 若对多菌灵、速克灵等杀菌剂产生抗性,则改用灰霉克防治有特效,即每 667 平方米用 28灰霉克可湿粉 600800 倍液 50匀喷雾,隔 7 一 10d 喷 1 次,连用 23 次即可。 蒜薹入库上架预冷时,在冷库通道上均匀分布保鲜灵烟雾剂熏蒸。 专利查询。大蒜的灰霉病
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