author(s)
Tabasum Iqbal, Suhail Altaf, Mohammed Tauseef Ali, Shahid Qayoom Dar, Shaheen Kousar Jan and Mohammad Younus Wani

abstract
In vitro studies were conducted to evaluate the comparative efficacy often systemic and non-systemic fungitoxicants against Alternaria solani (Ellis and Martin). Both systemic and non systemic fungicides were evaluated for their efficacy against the mycelial growth of A. solani by using poisoned food technique. On an overall mean basis, Mancozeb, proved the most effective exhibiting mean mycelial growth inhibition of 83.10 per cent followed by Dodine and Polyram causing 77.00 and 57.10 per cent mean inhibition, respectively, while Propineb proved the least effective among test non systemic fungitoxicants showing only 51.88 per cent mean inhibition. The maximum inhibition of 77.11 per cent was achieved at 500μg a.i ml-1 which decreased as the fungitoxicant concentration decreased. The minimum inhibition of 53.65 per cent was recorded at a concentration of 50 μg a.i ml-1 concentration. Amongst the systemic fungicides Difenoconazole, proved the most effective exhibiting mean mycelial growth inhibition of 81.08 per cent followed by Flusilazole and Hexaconazole causing 74.47 and 70.82 per cent mean inhibition, respectively, while Myclobutanil proved the least effective among test systemic fungitoxicants showing only 41.83 per cent mean inhibition. The maximum inhibition of 72.63 per cent was achieved at 50 μg a.i ml-1which decreased as the fungi toxicant concentration decreased. The minimum inhibition of 51.85 per cent was recorded at a concentration of 10 μga.i ml-1concentration.Mancozeb and dodine caused 91.66 and 90.00 per cent mycelial growth inhibition at 500 μga.i ml-1 Difenoconazole and Flusilazole caused 96.25 and 89.74 per cent mycelial growth inhibition at 50 μga.i ml-1.