Suppression of Bacterial Spot of Tomato with Foliar Sprays of Compost Extracts Under Greenhouse and Field Conditions

The efficacy of foliar sprays with compost water extracts (compost extracts) in reducing the severity of bacterial spot of tomato caused by Xanthomonas vesicatoria was investigated. Extracts prepared from composted cow manure, composted pine bark, an organic farm compost, or composted yard waste, ap...

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Veröffentlicht in:Plant disease. - 1997. - 87(2003), 8 vom: 20. Aug., Seite 913-919
1. Verfasser: Al-Dahmani, Jaber H (VerfasserIn)
Weitere Verfasser: Abbasi, Pervaiz A, Miller, Sally A, Hoitink, Harry A J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2003
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article benzothiadiazole biological control chlorothalonil compost tea compost-induced systemic resistance
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520 |a The efficacy of foliar sprays with compost water extracts (compost extracts) in reducing the severity of bacterial spot of tomato caused by Xanthomonas vesicatoria was investigated. Extracts prepared from composted cow manure, composted pine bark, an organic farm compost, or composted yard waste, applied as foliar sprays on tomato transplants, resulted in a moderate but statistically significant reduction in the severity of bacterial spot. The population of X. vesicatoria in infected leaves was reduced significantly by extracts prepared from composted cow manure. Efficacy of the water extracts was not affected by oxygen concentrations in the suspension during extraction, compost maturity, or sterilization by filtration or autoclaving. The degree of control provided by foliar sprays with the most effective compost extracts did not differ from that obtained with the plant activator acibenzolar-S-methyl. In the field in two growing seasons, foliar sprays with compost water extracts did not reduce the severity of foliar diseases, including bacterial spot. During the 1997 season, when the severity of bacterial spot in the field was high, foliar sprays with compost water extracts significantly reduced the incidence of bacterial spot on tomato fruit. Amending plot soil with several rates of composted yard waste did not lead to additional control of fruit disease over those only sprayed with extracts. Foliar sprays with a mixture of chlorothalonil and copper hydroxide or with acibenzolar-S-methyl reduced the severity of bacterial spot as well as incidence of spot on fruit 
650 4 |a Journal Article 
650 4 |a benzothiadiazole 
650 4 |a biological control 
650 4 |a chlorothalonil 
650 4 |a compost tea 
650 4 |a compost-induced systemic resistance 
700 1 |a Abbasi, Pervaiz A  |e verfasserin  |4 aut 
700 1 |a Miller, Sally A  |e verfasserin  |4 aut 
700 1 |a Hoitink, Harry A J  |e verfasserin  |4 aut 
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