FIG. 3.

Transmission rates of different CaMV mutants by five aphid species. Means are presented together with standard errors. Bb, Brevicoryne brassicae; Mp, Myzus persicae; Me, Macrosiphum euphorbiae; Bh, Brachycaudus helichrysi; and Nr, Nasonovia ribisnigri. Note that N. ribisnigri (dotted line) transmitted all variants at similar rates, while transmission by M. persicae (plain line) varied drastically depending on the type of virus variant tested. For statistical significances of the observed differences in transmission rates, see Table 1.