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试述koch’s法则的具体步骤。
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试述koch’s法则的具体步骤。
时间：2022-01-11 08:08
关键词：
植物病理学
农学
大学试题
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<p> （1）在病植物上检查到病原物。<br> （2）该病原物可在离体或人工培养基上分离纯化而得到纯培养。<br> （3）将纯培养接种到相同的健株上，表现出相同症状的病害。<br> （4）从接种发病的植物上再分离到其纯培养，性状与原来的记载相同。</p>
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