Management of Papaya Ringspot Virus (PRSV) using Insecticides and bio Rationals under Field Conditions

Author: U. Premchand, R.K. Mesta, M.P. Basavarajappa, M.A. Waseem, Y.S. Mahesh, Sarvamangala Cholin and D.P. Prakash

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Abstract

A field experiment conducted at the Haveli farm, College of Horticulture, UHS Bagalkot, Karnataka, India during 2019-20 to evaluate efficacy of different combination of insecticides and bio rationals (plant based oils and seaweed extract) in reducing Papaya ringspot virus (PRSV) incidence in papaya under field conditions. The results indicated that different combination of insecticides and bio rationals differed in their effectiveness in delaying PRSV infection. A combination of insecticides i.e tolfenpyrad 15% EC @1 ml/lt, imidacloprid 17.8%SL @ 0.2 ml/lt, thiacloprid 21.7 SC @ 1 ml/lt and dinotefuran 20 % SG @ 0.5g/lt sprayed along with micronutrients at every 30 days internals was the most effective treatment with less PRSV infection. Out of nine treatments complete protection could not be obtained in any of the treatment combinations probably due to the non persistent nature of virus transmission by vectors

Keywords

Papaya ringspot virus, Seaweed extract, Bio oils, Tolfenpyrad 15% EC, Imidacloprid 17.8%, Thiacloprid 21.7 SC, Dinotefuran 20 % SG, Insecticides, Bio rationals, Management

Conclusion

The studies on the management of PRSV under field condition during 2019-20 using insecticides and bio rationales revealed that treatment T1 (8 sprays at 30 days intervals, 1st Tolfenpyrad 15% EC @ 1 ml/lt, 2nd Imidacloprid 17.8%SL @ 0.2 ml/lt, 3rd Thiacloprid 21.7 SC @ 1 ml/lt, 4th Dinotefuran 20 % SG @ 0.5g/lt, 5th Tolfenpyrad 15% EC @ 1 ml/lt, 6th Imidacloprid 17.8% SL @ 0.2 ml/lt, 7th Thiacloprid 21.7 SC @ 1 ml/lt, 8th Dinotefuran 20 % SG @ 0.5g/lt and followed with micronutrients) proved as the best treatment in managing PRSV under field conditions. It recorded least diseases incidence i.e., 2.78 % at 240 DAT and took 360 DAT to reach 100 % Treatment, T5 (8 sprays at 30 days intervals having combination of four different insecticide and seaweed extract, Tolfenpyrad 15% EC @ 1 ml/lt, Seaweed extract @ 4ml/lt, Imidacloprid 17.8% SL @ 0.2 ml/lt, Seaweed extract @ 4ml/lt, Thiacloprid 21.7 SC @ 1 ml/lt, Seaweed extract @ 4ml/lt, Dinotefuran 20 % SG @ 0.5g/lt, Seaweed extract @ 4ml/lt an

References

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How to cite this article

Premchand, U., Mesta, R.K., Basavarajappa, M.P., Waseem, M.A., Mahesh, Y.S., Cholin, S. and Prakash, D.P. (2021). Management of Papaya Ringspot Virus (PRSV) using Insecticides and bio Rationals under Field Conditions. Biological Forum – An International