Fig. 1

Wheat plants showing lethal necrosis and mosaic. a The overall incidence of WYMV in a field in Junnan, Shandong Province. The small figure on the upper right shows an individual wheat plant infected with WYMV. b The overall incidence of CWMV in a field in Xiping, Henan Province. The small figure on the upper right shows an individual wheat plant infected with CWMV