Effect of Foliar Nutrition on Powdery Mildew Disease Resistance and Yield in Greengram (VIGNA RADIATA l. Wilczek.)
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Date
2015-07
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University of Agricultural Science, Dharwad
Abstract
A field experiment was conducted during kharif, 2014 to study the effect of nutrients on physiology, yield, yield components and disease incidence in greengram (Vigna radiata L. Wilczek.) at MARS, UAS, Dharwad. The experiment was laid out in randomized completely block design (RCBD) with nine treatments and three replications. Treatments included, foliar application fungicide (propiconazole 0.1%) and nutrients like KNO3 (0.1%), MnSO4 (0.3%), ZnSO4 (0.5%) alone and in combination at 35 and 50 days of sowing.
The foliar application of nutrients and fungicide significantly increased the plant height, dry matter in leaf, stem, reproductive parts and total dry matter content compared to control. The growth parameters viz., AGR, CGR, NAR, SLW, LAI and LAD increased significantly due to the combined application of KNO3 (1.0%) + MnSO4 (0.3%) + ZnSO4 (0.5%) followed by MnSO4 (0.3%). The biochemical parameters viz. chlorophyll ‘a’, ‘b’, total chlorophyll, phenol content and peroxidase activity were also significantly increased as compared to control due to the foliar spray of combination of nutrients viz., 1.0% of KNO3, 0.3% of MnSO4, ZnSO4 (0.5%), followed by 0.3% of MnSO4.
The application of KNO3 (1.0%) + MnSO4 (0.3%) + ZnSO4 (0.5%) recorded higher seed yield, which was followed by MnSO4 (0.3%). The higher seed yield was due to significant increase in yield traits like number of pods per plant, number of seeds per pod, seed yield per plant. In fungicide treatment seed yield was also differed significantly compared to control. Significant increase in seed yield and harvest index in foliar spray of nutrients and fungicide was also due to less incidence of diseases.
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