Vol. 7, Issue 11, Part F (2025)

Mung bean powdery mildew caused by Erysiphe polygoni DC. affects all the stages of the plant growth by causing premature defoliation, the plants become stunted and fail to grow properly and resulting 21 to 40 per cent yield loss in mung bean. Looking into significance of disease various non- systemic, systemic and combi product fungicides were evaluated in vitro for their efficacy against Erysiphe polygoni DC. by spore germination inhibition technique. Results revealed, among non-systemic fungicides evaluated, Wettable sulphur 80 WP, Dinocap 48 EC recorded maximum mean spore germination inhibition of 76.06, 73.68 per cent, respectively and least spore germination inhibition (65.67 %) was noticed in Copper oxychloride 50 WP. Among systemic fungicides evaluated, Azoxystrobin 23 SC, Tebuconazole 25.9 EC recorded maximum mean spore germination inhibition of 95.50, 94.20 per cent, respectively and least spore germination inhibition (76.08 %) was notice in Carbendazim 50 WP. Among combi fungicides evaluated, Tebuconazole 50 % + Trifloxystrobin 25 % WG, Azoxystrobin 11% + Tebuconazole 18.3% SC recorded maximum mean per cent inhibition of spore germination 86.22, 84.00 per cent and least mean per cent spore germination inhibition (67.90 %) was recorded in Carbendazim 12% + Mancozeb 63% WP.