Efficacy of Fungicides on Uredospores Germination of Leaf Rust of Wheat

Wheat is the important cereal crops after rice in India. India is the second largest producer of wheat next to China. Of the three rusts, leaf rust caused by Puccinia recondita Rob. Ex. Desm. f. sp. tritici is the most important fungal disease of wheat which inflicting heavy losses in different parts of the country. In vitro evaluation of four non-systemic and eight systemic fungicides at five different concentrations (50, 100, 250, 500 and 1000 ppm) were evaluated to control uredospores germination of Puccinia recondita f. sp. tritici. Among non-systemic fungicides revealed that maximum inhibition of uredospores germination was observed in mancozeb (54.85%) followed by chlorothalonil (40.89%). The different concentrations tried, the maximum inhibition of uredospores germination was at 1000 ppm of mancozeb which inhibited 83.33 per cent uredospores germination followed by same fungicide with 500 ppm (72.31%). Among systemic fungicides, propiconazole found the best for inhibition of 86.03 per cent uredospores germination followed by hexaconazole and penconazole with 77.40 and 72.29 per cent, respectively.