The Efficacy Of The Fungicide Ridomil (Metalaxyl)On Control Of Early Blight Disease (Alternaria solaniEll. and Mart.) Jones And Grout In Tomato Crop(Lycopersicon esculentum Mill.)

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Date
2015-05-21
Authors
Ibrahim, Hafiz Ibrahim Abdelrahim
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Publisher
UOFK
Abstract
The present study was conducted to assess the efficacy of one fungicide in attempt to control Early Blight Disease caused by (Alternaria solani Ell. And Mart.) Jones and Grout on tomato crop (Lycopersicon esculentum L.). The effects of this disease was measured in terms of disease incidence, disease severity and yield. The experiment was conducted during winter season of ٢٠٠٤/٢٠٠٥ in The Demonstration Field Of The Horticultural Department, Faculty Of Agriculture, University Of Khartoum. The Ridomil (Metalaxyl) fungicide was applied at three different concentrations: Proposed dose ١٫٠٠kg/fed., ٢٥٪more ١٫٢٥kg/fed. and ٢٥٪ less ٠٫٧٥kg/fed. than the proposed dose. The results showed that the application of Ridomil at the three concentrations resulted in variable reductions in the disease incidence and disease severity in comparison with the control treatment. The least disease incidence of ٤٥٫٠٠٪ and the least disease severity of ٤٫٥٦٪ were recorded when Ridomil at concentration of ١٫٢٥kg/fed. was applied. ٢٤ The highest number of fruits per plant of ٩٫٠٨ and the highest yield of ٥٤٫٥٠kg/ha. with an increase of ٥٥٫٨٩kg/ha. in comparison with the control treatment, were recorded when Ridomil at concentration of ٠٫٧٥kg/fed.was applied. The least percentage of discarded fruits of ٢٫٠٨٪ was recorded when Ridomil at concentration ١٫٢٥kg/fed.was applied. The use of Ridomil at concentration of ١٫٢٥kg/fed. proved to be the most effective in combating Early Blight Disease other. Because it reduced in the disease incidence and the disease severity and the discarded fruits. While the use of Ridomil at concentration of ٠٫٧٥kg/fed. proved to be effective in increasing of the number of fruits per plant and yield compared to the other two concentrations.
Description
June 2006
Keywords
Blight Disease,Tomato
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