An Assessment on the Efficacy of Different Fungicides against Powdery Mildew of Vigna radiata L. (Mung Bean) under Field Condition

Abstract

The present study was conducted during consecutive Kharif season 2024-25. Using selected fungicides against Powdery mildew caused by Erysiphe polygoni DC. To manage the disease an investigation was carried out in the department of Plant Pathology, College of Agriculture, Latur under Vasanrao Naik Marathwada Krishi Vidyapeeth. An experiment was conducted to evaluate the efficacy of eight fungicides (Azoxystrobin 11% + Tebuconazole 18.30% SC @ 0.1 %, Tebuconazole 50% + Trifloxystrobin 25% WG @ 0.05 %, Hexaconazole 5% SC @ 0.1 %, Tebuconazole 25.9% SC @ 0.1 %, Myclobutanil 10% WP @ 0.1 %, Azoxystrobin 23% SC @0.1 %, Wettable Sulphur 50% WP @ 0.3 % and Dinocap 48% EC @ 0.2 %) against powdery mildew of mung bean, using a Randomized Block Design (RBD) with three replications. In a field assay, the result showed that among the treatments Tebuconazole 50% + Trifloxystrobin 25% WG @ 0.05 % (PDI 19.61 & PDC 65.52) as foliar spray significantly to be most effective recorded with minimum percent disease intensity and maximum percent disease control on leaves followed by Azoxystrobin 11% + Tebuconazole 18.30% SC @ 0.1 % (PDI 22.10 & PDC 61.30), Azoxystrobin 23% SC @0.1 % (PDI 24.17 & PDC 57.56), Hexaconazole 5% SC @ 0.1 % (PDI 27.04 & PDC 52.54), Tebuconazole 25.9% SC @ 0.1 % (PDI 29.27 & PDC 48.47), Dinocap 48% EC @ 0.2 % (PDI 32.03 & PDC 43.80) and Wettable Sulphur 50% WP @ 0.3 % (PDI 34.90 & PDC 38.59), respectively. While Myclobutanil 10% WP @ 0.1 % (PDI 39.85 & PDC 30.39) as foliar spray significantly to be least effective recorded with maximum percent disease intensity and minimum percent disease control. The experiment reveled that, among the treatments Tebuconazole 50% + Trifloxystrobin 25% WG @ 0.05 % (14.45 qt/ha), significantly recorded maximum yield (qt/ha) followed by Azoxystrobin 11% + Tebuconazole 18.30% SC @ 0.1 % (13.59 qt/ha). While Myclobutanil 10% WP @ 0.1 % recorded minimum yield (8.91 qt/ha). Results documented in the (Table 3) showed that, all the treatments recorded overall benefits over control. Hexaconazole 5% SC gave highest net benefits with highest ICBR 1:10.88. The second-best treatment was found to be T1: Azoxystrobin 11% + Tebuconazole 18.30% SC with ICBR 1:7.33, followed by treatments T2, T7, T4, T8, T6 and T5 which recorded ICBR as, 1:6.27, 1:5.09, 1:3.50, 1:3.38, 1:2.81 and 1:0.88, respectively over the untreated control.