Antibacterial effect of Allium sativum

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• 作者：G.M. Balestra ; A. Heydari ; D. Ceccarelli ; E. Ovidi ; A. Quattrucci
• 关键词：Biocontrol ; Phytopathogenic bacteria ; Plant extracts ; Organic agriculture
• 刊名：Crop Protection
• 出版年：2009
• 期刊代码：28_02612194
• 类别：abs
• 出版时间：October 2009
• 卷：28
• 期：10
• 页码：807-811
• 文件大小：136 K

摘要

Bacterial pathogens are a serious problem on tomato plants. Amongst them, Pseudomonas syringae pv. tomato (Pst), Xanthomonas vesicatoria (Xv) and Clavibacter michiganensis subsp. michiganensis (Cmm), causal agents of bacterial speck, bacterial spot and bacterial canker, respectively, affect tomato production under greenhouse and field conditions. In in vitro tests with bacterial strains at a population density of 10⁶ and 10⁸ cfu ml⁻¹, vegetal extracts from cloves of A. sativum and fruits of F. carica at concentrations of 1 and 30%, respectively, showed best effects at 10⁶ cfu ml⁻¹ bacterial concentration. In in vivo tests bacterial strains were tested at 10⁵ cfu ml⁻¹; A. sativum and F. carica extracts reduced disease incidence by 58 and 30%, and disease severity by 68 and 22%, respectively. Moreover, these vegetal extracts resulted in effective disease control of up to 65%(A. sativum) and 38%(F. carica) of that of the standard copper treatment. The antibacterial effects of A. sativum and F. carica extracts are useful for protecting tomato plants against Pst, Xv and Cmm in the greenhouse.