Leaf blight of sunflower incited by Alternaria helianthi (Hansf.) Tubaki and Nishihara is a potentially destructive disease in most sunflower growing countries causing leaf spots, defoliation ultimately substantial yield loss. Considering the importance of crop and disease, different fungicides, bio-agents and plant extracts were evaluated using poisoned food technique and paper towel method at different dosages. Among seed dressing fungicides, Captan 70% + Hexaconazole 5% WP recorded cent per cent inhibition at 0.2 and 0.3 per cent (94.73 per cent average inhibition) as well as highest seedling vigour index of 4325 at 0.2 per cent dose, followed by Penflufen 13.28% + Trifloxystrobin 13.28% FS which showed 79.14 per cent average mycelial inhibition while least of 11.72 per cent mycelial inhibition was recorded by Tebuconazole 5.36% FS. Least seedling vigour index of 3922 was recorded at 0.3 per cent by Carbendazim 25 + mancozeb 50% WP. Among contact fungicides, Mancozeb and Hexaconazole were the superior contact and systemic fungicides with an average of 83.52 and 84.54 per cent mycelial inhibition (100% @ 0.2% and 0.05% dose onwards), respectively. Chlorothalonil 75% WP (9.3%) and Validamycin 3% L (10.67%) were the least effective contact and systemic fungicides, respectively. With respect to combi product fungicides, Captan 70% + Hexaconazole 5% WP and Fenamidone 10% + Mancozeb 50% WG was found highest and lowest effective with 93.15 average and 31.03 per cent (@0.3%) mycelial inhibition, respectively. The bio-agents, T. harzianum and B. subtilis were best and least effective with 78.52 and 42.15% mycelial inhibition, respectively in dual culture technique. Neem leaf extract and lantana leaf extract showed highest and lowest average of 52.68 and 32.76 per cent inhibition, respectively.