Vol. 11, Issue 7 (2022)

Author(s):
Ram Babu Sharma, Sunil Zacharia, Sobita Simon and Abhilasha A. Lal

Abstract:
Early blight disease of tomato caused by Alternaria solani (Ellis and Martin) Jones and Grout is an economically important disease causing massive losses throughout the country. Eleven plant extracts and 10 fungicides were tested in-vitro against A. solani in this study. At 10 percent concentration the most effective plant extract against A. solani in-vitro was leaf extract of Ocimum sanctum, inhibited mycelial growth by 65.00 percent. However leaf extract of Tagetes erecta inhibited mycelial growth by the minimum level (22.22%).The maximum inhibition of mycelial growth (68.33%) was observed with leaf extract of Datura stramonium at 15 percent concentration whereas least inhibition of mycelial growth observed in leaf extract of Tagetes erecta (38.14%). Contaf Plus, Folicur at 500 ppm, 750 ppm, 1000 ppm concentrations and Avtar at 1000 ppm, 1500 ppm, and 2000 ppm concentrations were the most effective fungicides.