Abstract
Two experiments were carried out to study the effect of plant age and soil types on the infection with root rot of apricot transplants under green house conditions, Results of the first trial showed significantly that the transplants of 3 years- old were more resistant than 2 years- old plants and one year- old when transplanted in soil artificially infested with each of Fusarium solani, Fusarium moniliforme, Rhizoctonia solani and Botryodiplodia theobromae separately. Results of the second trial showed significantly that the transplants grown in clay sandy soil exhibited the best results where the infection with root rot recorded the lowest values. Concerning the effect of systemic fungicides and the bio-fertilizer on the infection with root rot of apricot transplants under field conditions, results showed that the four tested chemicals decreased significantly the percentage of infection with root rot of apricot. Rizolex/T and Vitavax/T (200WP). showed the best results for disease control.
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