Unraveling the impact of soil nutrients on papaya black spot disease caused byAsperisporium caricae (Speg.) Maubl

Y Swathi Shetty; V B Sanath Kumar; N Kiran Kumar; K R Ashoka; Pooja Patel

doi:10.24154/jhs.v20i1.2480

Authors

Y Swathi Shetty University of Agricultural Sciences, Bangalore , University of Agricultural Sciences, Bangalore Author
V B Sanath Kumar University of Agricultural Sciences, Bangalore , University of Agricultural Sciences, Bangalore Author
N Kiran Kumar University of Agricultural Sciences Bangalore , University of Agricultural Sciences, Bangalore Author
K R Ashoka University of Agricultural Sciences, Bangalore , University of Agricultural Sciences, Bangalore Author
Pooja Patel University of Agricultural Sciences, Bangalore , University of Agricultural Sciences, Bangalore Author

DOI:

https://doi.org/10.24154/jhs.v20i1.2480

Keywords:

Available nitrogen, correlation, disease severity, exchangeable magnesium, soil

Abstract

The study was conducted to correlate soil nutrient factors and papaya black spot disease severity on leaves and fruits of the papaya plant cv. Taiwan Red Lady. The results revealed that there was a positive correlation coefficient i.e. increase in black spot severity for soil pH, available nitrogen, available phosphorus, exchangeable calcium and magnesium and hot water extractable boron with black spot of leaf severities, whereas, electrical conductivity, organic carbon, available potassium, available sulfur, DTPA extractable zinc, DTPA extractable manganese, iron and copper were negatively correlated with black spot severity on leaves. Further, black spot severity on fruits were positively correlated with soil pH, available N, available P, exchangeable Ca and Mg, DTPA extractable Cu, and negatively correlated with EC, OC, available K and S, DTPA extractable Zn, Mn and Fe, and hot water extractable B. Hence, the available nitrogen and exchangeable magnesium concentrations in soil significantly influence the papaya black spot disease severity but the difference in black spot severity due to changes in the concentration of nutrients other than these two analyzed in the experiment was nonsignificant.

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Author Biographies

Y Swathi Shetty, University of Agricultural Sciences, Bangalore, University of Agricultural Sciences, Bangalore

Research Scholar, Department of Plant Pathology, College of Agriculture, V. C. Farm, Mandya, Karnataka, India
V B Sanath Kumar, University of Agricultural Sciences, Bangalore, University of Agricultural Sciences, Bangalore

Professor, Zonal Agricultural Research Station, College of Agriculture, V. C. Farm, Mandya, Karnataka, India
K R Ashoka, University of Agricultural Sciences, Bangalore, University of Agricultural Sciences, Bangalore

Assistant Professor, Department of Soil Science and Agricultural Chemistry, College of Agriculture, V. C. Farm, Mandya, Karnataka, India
Pooja Patel, University of Agricultural Sciences, Bangalore, University of Agricultural Sciences, Bangalore

Assistant Professor,a Department of Plant Pathology, College of Agriculture, V. C. Farm, Mandya, Karnataka, India

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