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Integrated methods for controlling potato foliage diseases under organic agriculture sustem [electronic resource].

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Tohamy, M.R

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Language: English Summary language: Arabic Description: p.161-171Other title:

طرق متكاملة لمكافحة أمراض المجموع الخضري في البطاطس تحت نظام الزراعة العضوية.‪ [Added title page title]

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Egyptian journal of agricultural research, 2009 v. 87 (1), Special issue [electronic resource]:

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In: Egyptian Journal of Agricultural Research 2009.v.87(1)SPSummary: Late blight caused by Phytopthora infestans (Mont.) de Bary and early blight caused by Alternaria solani (Ell. And Mart.) as well as gray mould incited by Botrytis cinerea Person are considered the most destructive potato foliage diseases. Plant extracts, organic acids and fungicide were tested against the three pathogens under field conditions. This study showed that, organic acids followed by plant extracts were the most effect on potato Valor variety in different seasons when compared with fungicide and increased yield. Salicylic acid was the most effective organic acids increased in percentage reduction of disease incidence in plants either cultivated in organic or mineral fertilization fields in season 2004 and 2005. The percentage reduction of disease incidence and disease severity was higher in organic fertilization than in mineral one. Camphor and garlic extracts were the most effective while, the least zanzalkht.

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Late blight caused by Phytopthora infestans (Mont.) de Bary and early blight caused by Alternaria solani (Ell. And Mart.) as well as gray mould incited by Botrytis cinerea Person are considered the most destructive potato foliage diseases. Plant extracts, organic acids and fungicide were tested against the three pathogens under field conditions. This study showed that, organic acids followed by plant extracts were the most effect on potato Valor variety in different seasons when compared with fungicide and increased yield. Salicylic acid was the most effective organic acids increased in percentage reduction of disease incidence in plants either cultivated in organic or mineral fertilization fields in season 2004 and 2005. The percentage reduction of disease incidence and disease severity was higher in organic fertilization than in mineral one. Camphor and garlic extracts were the most effective while, the least zanzalkht.

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