1. Laboratory of Virology, Department of Plant SciencesWageningen University Droevendaalsesteeg 1 6708 PB Wageningen the Netherlands
2. Instituto de Ciências Biológicas, Departamento de Biologia CelularUniversidade de Brasília ICC—Sul Asa Norte 70910‐900 Brasília DF Brazil
3. Embrapa Vegetable Crops (CNPH) BR 060 Km 09 70351‐970 Brasília DF Brazil