University of Khartoum

A Study on Varietal Resistance and Fungicide Ivory M 72wp On Early Blight Disease (Alternaria Solani Ell. and Mart.) Jones and Grout. In Tomato

A Study on Varietal Resistance and Fungicide Ivory M 72wp On Early Blight Disease (Alternaria Solani Ell. and Mart.) Jones and Grout. In Tomato

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Title: A Study on Varietal Resistance and Fungicide Ivory M 72wp On Early Blight Disease (Alternaria Solani Ell. and Mart.) Jones and Grout. In Tomato
Author: Elbasheer, Nagla Eltahir Elamir
Abstract: This study was conducted to assess the efficacy of Ivory M 72 WP fungicide which was used for the first time in this research, in the Sudan to control early blight disease in tomato caused by Alternaria solani (Ell. & Mart.). Efficacy was assed in terms of disease incidence, disease severity, weight of fruits per plant, percentage of discarded fruits and total yield. This experiment was conducted during winter of 2003 / 2004 in the Demonstration Farm of the Faculty of Agriculture, Shambat – University of Khartoum. Three doses of the chemical were used; 10.4 g/L (E), 8.5 g/L (F) and 6.4 g/L (G). Three tomato varieties namely; Peto 86, UC 82 and CastleRock were chosen for the study. The results showed that the application of the fungicide at three concentrations resulted in no reduction in disease incidence. The use of Ivory M 72WP at the three concentrations reduced the disease severity in comparison with the control treatment. The mean disease severity in the range of 20.25 – 28.97% was recorded for the Peto 86, with the highest percentage of 28.97% for control treatment H. and the lowest percentage of 22.25% for concentration F. For UC 82, mean disease severity in the range of 26.35 % - 46.35 % was recorded, with the highest percentage of 46.35 % for control treatment H, and the lowest percentage of 26.35 % for concentration E. For CastleRock, mean disease severity in the range of 25.50 % - 48.82 % was recorded, with the highest percentage of 48.82 % for control treatment and the lowest percentage of 25.50 % for concentration F. The highest increase in yield in comparison with control treatment of 44.0 – 43.6 % was recorded when Ivory M 72WP was used at the recommended concentration F (8.4 g/L) in Peto 86 and CastleRock. When the chemical was used at the concentration E (10.4 g/L) the highest increase in yield of 36.3 % was recorded in UC 82. The use of the chemical at the concentrations of E (10.4g/L) and F (8.5g/L) resulted in the least percentage of discarded fruits in comparison with concentration G (6.4g/L) and control treatment.
Description: July, 2004
URI: http://khartoumspace.uofk.edu/handle/123456789/10672
Date: 2015-05-12


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