Temperature requirements of beet necrotic yellow vein furovirus
Experiments were carried out in Belgium to investigate the temperature requirements of Polymyxa betae and beet necrotic yellow vein furovirus (EPPO A2 quarantine organism). Four night/day temperatures (10/15, 15/20, 20/25 and 25/30° C) were compared in controlled environment conditions.
It was observed that the 20/25 ° C condition was the optimum both for the earliness of root infection by plasmodia and cytosori of P. betae as well as for the transmission and multiplication of BNYVV. The 10/15° C condition induced a reduction in germination of P. betae cytosori, a delayed occurrence of plasmodia and cytosori in infected roots as well as reduced multiplication of BNYVV. .
The authors suggested that the expression of severe rhizomania symptoms in some countries might be related to the warmer climate in these countries.
Sources
Goffart, J.P.; Maraite, H. (1992) Influence of temperature on Polymyxa betae Keskin and beet necrotic yellow vein virus (BNYVV).
Speech at the 44th Symposium on Crop Protection, Gent, BE, in press!