西瓜嗜酸菌的土壤越冬存活和致病性测定

• 作 者: 彭斌 古勤生
• 机 构: 中国农业科学院郑州果树研究所,河南省果树瓜类生物学重点实验室,
• 出 处: 植物保护学报
• 发表日期: 2014年03期
• 关键词: 嗜酸菌 西瓜 西瓜种子 初侵染源 制种基地 育苗场 病残体 病原菌 带菌种子 水浸状

瓜类细菌性果斑病由西瓜嗜酸菌Acidovorax citrulli引起,苗期被侵染后子叶上出现水浸状病斑,严重时幼苗死亡,果实被该菌侵染后腐烂,完全丧失商品价值。Walcott等[1]研究表明带菌种子是瓜类作物生长季中主要的初侵染源,但目前还没有关于直接使用越冬后带菌土壤播种西瓜种子能否使其幼苗发病的报道。因此本试验对不同浓度的带菌土壤和带菌病残体土壤经越冬处理后检测其病原菌的存活和致病性,以期为制种基地和育苗场制定细菌性果

Melon bacterial fruit spot caused by watermelon acidophilic Acidovorax citrulli seedlings infected cotyledon blotchy lesions appeared on the seedlings died in severe cases, the fruit was infected with the decay after the complete loss of commercial value. Walcott et al. [1] showed that fungal seeds were the main source of initial infection in the growing season of melons. However, there are no reports on whether the direct use of watermelon seeds after planting overwintering can cause their seedlings to grow. Therefore, different concentrations of contaminated soils and diseased soils were tested for the survival and pathogenicity of the pathogenic bacteria after overwintering treatment in order to establish the bacterial effect for seed production and nursery grounds