摘要：Early blight of tomato caused by Alternaria solani is an economically important disease of tomato worldwide.The current study was designed to evaluate the genetic potential of twenty-six-tomato germplasm against the early blight and to find out the most suitable source of fungicides (cabrio top,dif-enoconazole,mancozeb and curzate M8) and plant extracts (ajwain,garlic and swanjna) to inhibit the growth of A.solani.In field trials,no variety was observed to be immune or highly resistant,1 variety (Tom-11) showed the resistant response with percent disease index (PDI) 9.55.Seventeen varieties were moderately resistant,5 varieties were moderately susceptible and 3 varieties exhibited the susceptible response with 68-70 PDI.In in-vitro results,the cabrio top at 300 ppm,were found to be the highly effective fungicide as it inhibited the 88.08% fungal colony diameter,while ajwain at 15% concentration were inhibited the 74.07% growth of A.solani after 3 days of interval.The overall findings concluded that the Tom-11 showed the resistant response against the A.solani while the fungicide cabrio top and the ajwain extract were found to be highly potent in minimizing the fungal growth.This study provides a suitable exploration to the farmers or researchers,for the available resistant germplasm against early blight and the most promising source of fungicides and plant extracts against A.solani.
