Vol. 10, Issue 11 (2021)

Author(s):
Deepika S, SK Manoranjitham, V Sendhilvel, G Karthikeyan and C Kavitha

Abstract:
Papaya ringspot virus disease is one of the major diseases of papaya causing yield loss upto 90 – 100% based on the stage of infection. The hybrid red lady succumbs highly to PRSV incidence which is being cultivated in a large area of Tamil Nadu. To manage the papaya ringspot virus disease in papaya induction of host immunity is a feasible strategy. In the present study micro nutrients along with different organic inputs were tested against PRSV. Application of nutrient solution made from zinc sulphate @ 0.5% + boric acid @ 0.1% + urea @ 1% as foliar spray along with soil drenching of humic acid @ 0.2% at 3^rd, 4^th, 7^th month after planting was found to be effective in reducing the disease expression and recorded 53.33% disease incidence against control which recorded 73.33% incidence followed by foliar spray of Boric acid alone @ 0.1% found to be effective in reducing PRSV expression. The growth parameters viz., plant height, stem girth, number of leaves was found to increased significantly in the combination treatment compared to control.