Non-chemical Management of Papaya Ring Spot Virus in Papaya (Carica papaya L.)

摘要

The efficacy of different treatments comprising of different cultural and biomolecules against Papaya ringspot virus (PRSV) was tested under field condition. Growing African tall maize as live barrier with silver reflective mulchand soil and foliar application of micronutrients with neem leaf extract (5ml / litre), neem oil (5ml / litre), Kappaphycus alvarezii-1 (4.0 ml / It), Kappaphycus alvarezii-2 (6.0 ml / It) and Synthetic Oligo (0.25mg / litre) was found significantly effective in reducing PRSVincidence (86.76%) compared to border crop of African tall maize alone which as record 73.33 per cent disease control and an average yield of46.23 kg / plant. Among the bio -molecules, Kappaphycusalvarezii-lhas recorded 71.66 per cent disease control with the yield of 41.87 kg /plant. Use of reflective mulch recorded 65.67 per cent disease control with an average yield of 41.57 kg / plant. Spraying with botanicals and biopesticides vi.,neemleaf extract and neemoil have recorded 53.33 and 60.00 per cent, respectively. Whereas, untreated control plants showed 100 per cent disease incidence of PRSV.