Recognizing Potato virus Yntn (PVYntn) symptoms while searching for mild variants ("vaccine"/ bio-control)

23 de novembro de 2022

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Figure 1. Potato plant cv. Atlantic, from tuber infected with Potato virus Yntn (PVYntn), 55 days after planting.

Figure 2. Potato flowers, PVY symptomless, with aphids which transmit this virus.

Figure 3. Potato plants cv. Atlantic, on the left: tuber/seed-potato borne PVY infected, showing mild mosaic symptoms (putative mild-protective/vaccine); on the right: healthy (negative immune test for PVY (all strains)).

Potato plant cv. Atlantic, grown from a tuber/seed-potato infected with Potato virus Yntn (PVYntn) (Figure 1). At 55 days after planting,  symptoms of chloroses  and waving can be seen in the apical leaves but not in flowers (symptomless). Plants growing  in substrate soil (Carolina Soil F-75) fetilized with 20 g of NPK (4-14-8) at sowing/seed. PVY  is transmitted by different species of aphids (Figure 2), in a non-circulative (stylet borne) process, which usually takes only few minutes of feeding to accquire as well as to transmit this virus.
The research aimed at selecting plants with mild PVY variants (NTN or N) (Figure 3), for potential bio-control via tuber/seed-potato immunized by cross-protection.
Local: Glasshouse at Centro de P&D Fitossanidade - Virology Lab/Instituto Agronômico de Campinas (IAC) /APTA-SAA-SP. Address: Avenida Theodureto de Almeida Camargo, 1500, Campinas, SP ( Brazil) CEP 13075-630.

Kreuze, J F, Souza-Dias, J A C , Jeevalatha, A , Figueira , A R, Valkonen, J P T & Jones , R A C 2020. Viral Diseases in Potato. In: H Campos & O Ortiz (eds), The Potato Crop: Its Agricultural, Nutritional and Social Contribution to Humankind, 11, Springer, Cham, pp. 389-430. Disponível em:


How to cite: Souza-Dias, J.A.C.1; Feltran, J. C.2 Recognizing Potato virus Yntn (PVYntn) symptoms while searching for mild variants ("vaccine"/ bio-control). Agronômica Notícias. Disponível em: Acesso em: 22.nov.2022.

1Pesquisador Científico, Centro de P&D Fitossanidade/IAC/APTA/SAA-SP, contato:
2Pesquisador Científico, Centro de Horticultura /IAC/APTA/SAA-SP