Beet leafhopper transmits virescence of periwinkle
California Agriculture 31(6):14-15.
Published June 01, 1977
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Photo above shows healthy periwinkle on left and virescence-affected periwinkle on right; plant on right was exposed to beet leafhopper (Circulifer tenellus) that had previously fed on another virescence-affected periwinkle. Photo below shows periwinkle plant that developed virescence after exposure to infective beet leafhopper; not variation in severity of symphotoms.