Mungbea Case Study

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Infected mungbean plants were stunted in growth due to infection of roots by M. phaseolina. Mild chlorosis of leaves was observed. The tap root got rotten and was devoid of lateral roots due to infection by root-rot fungus because of which drying and withering of leaves occurred. Mungbean cv. T-44 was found to be highly susceptible to as the cultivar scored 4.5 disease severity on 0-5 scale. More than 75% of the leaves and twigs showed symptoms of wilting. Treatment with fungicides checked the disease severity (P≤0.05, Figure 1). Highest significant reduction in the root-rot severity index was observed with carbendazim (44.4%). Next in effectiveness was captan which significantly reduced the disease by 37.8%. Thiram were moderate in effectiveness causing 33.3% root-rot reduction. Vitavax and mancozeb were found least effective in checking the disease and recorded only 28.9 and 26.7% suppression over control.
Plant growth and dry matter
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phaseolina. However, there was a non-significant reduction in the shoot and root length (0.5-2.0% and 0.4-1.6%) by thiram, vitavax and mancozeb. Treatment with mancozeb showed a significant reduction in the root dry weight in uninoculated soil by 8.3% over control. The mungbean plants inoculated with M. phaseolina caused 38.1 and 32.1% reduction in the shoot and root length. Treatment with fungicides however, checked the suppressive effects of the fungus and increased the shoot length by 13.1-25.4%. Similarly, root length was also increased by 10.5-25.1%. Carbendazim and captan were the most effective treatments and mancozeb was the least effective (P≤0.05, Table

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