Relative incidence of cucurbit viruses and relationshipwith bio-meteorological variables

ELISABETH POZZI; CECILIA BRUNO; CECILIA LUCIANI; MARCOS GIOVANI CELLI; VILMA CECILIA CONCI; MARIA CECILIA PEROTTO

AUSTRALASIAN PLANT PATHOLOGY

CSIRO PUBLISHING

Lugar: Collingwood; Año: 2020 vol. 49 p. 167 - 174

0815-3191

Environmental heterogeneity can shape the plant-virus relationship, furthering the appearance of new diseases in crops, or altering disease incidence and severity. In this work, we studied the virus association with environmental heterogeneity taking into account bio-meteorological variables and virus distribution. In Argentina, three potyviruses, Watermelon mosaic virus (WMV), Zucchini yellow mosaic virus (ZYMV), and Papaya ringspot virus (PRSV), and a cucumovirus, Cucumber mosaic virus (CMV), are the most common viruses infecting cucurbits. We identified the bio-meteorological variables that had the greatest impact on disease incidence. All the crops were infected with more than one virus in all the studied environments. Molecular and serological analyses showed the highest relative incidence for WMV (46%), the lowest for CMV (9%), and intermediate values for PRSV and ZYMV (20% and 24%, respectively). Infected plants had a random distribution. Viruses and bio-meteorological variables were highly correlated, with high support (Pearson?s r = 0.96, P