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Control of papaya ringspot virus by cross protection


, : Control of papaya ringspot virus by cross protection. Plant Disease 72(5): 375-380

Following a brief account of successful applications of cross protection in the control of virus diseases, details are given of the development of a mild str. of PRV, greenhouse tests of its efficacy in protecting against challenge inoculations with severe strs, method of mass inoculation of pawpaw seedlings, field trials in Hawaii and Taiwan, and large scale applications of these techniques in pawpaw orchards in Taiwan.

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Related references

McMillan, R.T.J.; Gonsalves, D., 1987: Effectiveness of cross-protection by a mild mutant of papaya ringspot virus for control of ringspot disease of papaya in Florida. One mild nitrous acid-induced mutant (PRV HA 5-1) of papaya ringspot potyvirus (PRV) was tested under field conditions in Florida. The pawpaw seedlings were infected by applying inocula with a spray gun equipped with 1.2 mm diam. nozzle, using pre...

Wang H L.; Yeh S D.; Chiu R J.; Gonsalves D., 1987: Effectiveness of cross protection by mild mutants of papaya ringspot virus for control of ringspot disease of papaya in taiwan. Two mild nitrous acid-induced mutants (PRV HA 5-1 and 6-1) of papaya ringspot virus (PRV) were tested under greenhouse and field conditions to study the potential of cross-protection for control of papaya ringspot disease of papaya in Taiwan. Unde...

Tennant, P.; Fitch, M.; Lius, S.; Gonsalves, C.; Manshardt, R.; Sanford, J.; Slightom, J.L.; Gonsalves, D., 1995: Coat protein-mediated protection and classical cross protection to control papaya ringspot virus in papaya. Transgenic Solo pawpaws (Carica papaya) with the coat protein gene of the mild papaya ringspot potyvirus (PRV) from Hawaii were generated from a cross between a female transgenic R0 line and nontransgenic pawpaws. The transgenic pawpaws had high l...

Tennant, P.F.; Gonsalves, C.; Ling, K.S.; Fitch, M.; Manshardt, R.; Slightom, J.L.; Gonsalves, D., 1994: Differential protection against papaya ringspot virus isolates in coat protein gene transgenic papaya and classically cross-protected papaya. Transgenic papaya expressing the coat protein gene of the mild papaya ringspot virus strain from Hawaii (PRV HA 5-1) showed high levels of resistance against the severe PRV HA isolate from Hawaii. Inoculation with high concentrations of the virus,...

Yeh, S.D.; Gonsalves, D., 1994: Practices and perspective of control of papaya ringspot virus by cross protection. Research on the generation of mild strains of papaya ringspot potyvirus (PRV) by traditional mutagenesis and the results of field trials with such mutants over 8 years in Taiwan, Hawaii and other parts of the world are outlined with a discussion o...

Dias, P.R.P.; Rezende, J.A.M., 2001: Problems associated with cross protection of watermelon for the control of Papaya ringspot virus. Studies were carried out to evaluate the protective effect of two mild strains of papaya ringspot virus, watermelon strain, on watermelon plants under greenhouse and field conditions. The results showed that protection was positive under both cond...

Sheen, T.F.; Wang, H.L.; Wang, D.N., 1998: Control of papaya ringspot virus by cross protection and cultivation techniques. Journal of the Japanese Society for Horticultural Science 67(6): 1232-1235, Nov

Yeh S D.; Gonsalves D., 1984: Evaluation of induced mutants of papaya ringspot virus for control by cross protection. Efforts to select naturally occurring mild strains of papaya ringspot virus (PRV) by field collection or single-lesion isolation from natural virion populations were not successful. In an attempt to induce mild strains, crude sap from PR-infected...

Yeh, S.D., 1991: Control of papaya ringspot virus by cross protection: conventional versus innovative. The unavailability of pawpaw cultivars with resistance to papaya ringspot potyvirus, the difficulty of eradication and the restricted host range of PRV make cross-protection an attractive method of control. Two mild virus mutants (PRV HA 5-1 and 6...

Rezende, J.A.M.; Pacheco, D.A., 1998: Control of papaya ringspot virus-type W in zucchini squash by cross-protection in Brazil. Two mild strains of papaya ringspot virus-type W (PRSV-W) were tested under greenhouse and field conditions to study the potential of cross-protection for control of zucchini squash mosaic. Protected plants of zucchini squash cultivars Caserta and...