Pietersen, Gerhard; Pietersen, G. (Jnr); Pietersen, I.; Stiller, M.(South African Society for Enology and Viticulture, 2018)
Aster yellows phytoplasma (AY), only recently reported in South Africa and still limited in its distribution
in the country, causes a serious disease of grapevine. A leafhopper, Mgenia fuscovaria (Stål)(Hemiptera:
Cicadellidae), ...
