Transmission of Tristeza by Aphids Prevalent on Citrus, and Operation of the Tristeza Suppression Programme in Israel*

摘要: Natural spread of citrus tristeza virus (CTV) in Israel was first observed 1970 the Hibbat Ziyyon area (Bar-Joseph et al. 1972). The disease had been found as early 1956, mainly introduction plots, but without any indication natural (Reichert and Bental, 1960). Subsequently, it shown that strain VT, from Sharon Plain where observed, is efficiently transmitted by Aphis gossypii Glov. Loebenstein, 1973). Transmission rates averaging 40% (with 100 aphids each test) were obtained, compared with less than 5% two other isolates, CT ST. high rate transmission