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期 刊 ：植物保护学报 2008年

关键词：红树；海洋细菌；辣椒；青枯病；生物防治；

Keywords:mangrove, marine bacteria, capsicum, bacterial wilt, biological control,

摘 要 ：为探讨拮抗植物青枯病菌的红树内生海洋细菌CⅢ-1菌株的防病作用,采用室内盆栽和大田小区试验,对该菌株防治辣椒青枯病的效果进行了测定。室内盆栽测定结果显示,菌株发酵液浸种后25天的辣椒株高增加47.58%、鲜重增加67.72%,菌株处理21天后对辣椒青枯病的防治效果达80.77%;田间试验测定结果显示,用菌株发酵液处理21天后对辣椒青枯病防治效果达73.44%;用菌株发酵液及其配制的菌株制剂处理,70天后对辣椒青枯病防治效果分别为41.32%和75.51%,辣椒株高分别增加16.45%和26.62%,产量分别增加15.03%和38.86%。结果表明海洋细菌CⅢ-1菌株对辣椒青枯病具有良好的防病效果。

Abstract:In order to study the efficacy of the endophytic marine bacterium strain CⅢ-1 isolated from the leaf of Bruguiera gymnorrhiza on the biological control the capsicum bacterial wilt caused by Ralstonia solanacearum, the pots and fields tests were used in this paper. Tested in the pots and treated with the suspension of strain CⅢ-1, the capsicum bacterial wilt was reduced 80.77% at 21d, the capsicum height and fresh weight were increased 47.58% and 67.72% respectively at 25d, compared to the control. When tested in fields and treated with the strain suspension, the disease was reduced 73.44% at 21d. And tested in the fields and treated with the strain CⅢ-1 suspension and its agent which mixed with the bacterial suspension and the offal of the agricultural product processing, the disease were reduced 41.32% and 75.51% respectively at 70d, the plant height increased 16.45% and 26.62%, the yield of the capsicum increased 15.03% and 38.86%, respectively compared to the control. This suggests that the marine bacterium CⅢ-1 was a good candidate strain to biological control the bacterial wilt of capsicum.

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