In vitro efficacy of systemic and nonsystemic chemicals on the growth inhibition of Alternaria solani causing early leaf blight of tomato

Somnath Koley; Shyama Sundar Mahapatra

Volume : V, Issue : V, May - 2016

In vitro efficacy of systemic and nonsystemic chemicals on the growth inhibition of Alternaria solani causing early leaf blight of tomato

Somnath Koley, Shyama Sundar Mahapatra

Abstract :

In vitro testing of four non–systemic chemicals and six systemic chemicals against the fungus revealed that Propineb @ 0.1% among the non–systemic chemicals and Propiconazole @ 0.05% among the systemic chemicals were the best resulting in cent per cent and 96.91% growth inhibition of Alternaria solani, respectively. 0.3% concentration of non–systemic chemicals and 0.15% of systemic chemicals showed the highest growth inhibition (87.50% and 75.61%, respectively) of the fungus. As regards to the interaction effect between the tested chemicals and their concentrations, it was found that Mancozeb @ 0.3% was statistically at par with Copper oxychloride @ 0.2% and Difenoconazole @ 0.15% was statistically at par with Propiconazole @ 0.05%. These results will be helpful for the selection and rotation of the studied modern chemicals according to their potential lower concentration to reduce the environmental hazards and fungal resistance of the early blight fungus.