Anti-Fungal Properties of Plant Extracts in vitro against Alternaria solani, the Cause of Early Blight in Potato

Early blight, caused by Alternaria solani is one of the destructive diseases potato. An in vitro experiment was conducted using poisoned food technique to evaluate efficacy acetone extracts six plant species on mycelial growth A. solani. Plant Artemisia vulgaris, Melia azedarach, Parthenium hysterophorus, Datura stramonium, and Justicia adhatoda at concentrations 0.1%, 0.5% 5% prepared from Soxhlet extraction were mixed well molten potato dextrose agar (PDA) media poured into petri plates (90 mm Ø). PDA treated with a fungicide mancozeb positive control while untreated negative control. The inoculated 4 diameter plug seven days old actively growing incubated 26 ± 2 °C, radial recorded after 3rd, 5th, 7th 9th incubation percentage inhibition calculated comparing it plates. vulgaris significantly inhibited colonial 0.1% 36.07% 12.48%, respectively, 5th day inoculation (dai) as compared M. azedarach (0.72%), P. hysterophorus (10.17%) D. stramonium (10.20%) moderately inhibitory effect 1% concentration J. did not possess dai. All tested found some antifungal activity concentration. can be exploited potent alternative fungicides for controlling