Transmission of Cauliflower Mosaic Virus by the Green Peach, Turnip, Cabbage, and Pea Aphids12

The green peach aphid, Myzus persicae (Sulzer), and turnip aphid, Hyadaphis erysimi (Kaltenbach), transmitted cauliflower mosaic virus at a higher rate after single short acquisition probes than after a 6-h acquisition access period. The cabbage aphid, Brevicoryne brassicae (L.), transmitted the virus at a higher rate after a 6-h access period than after single short acquisitions probes. The pea aphid, Acyrthosiphon pisum (Harris), consistently transmitted at a high rate after prolonged access to the virus source but at a variable rate after single short probes. Retention of inoculativity of the virus by the cabbage aphid can be longer than 24 h, but this degree of retention did not occur with the other three vectors. Little difference occurred in the transmission rates of the virus between adults and 1st instars of the green peach or the pea aphid. However, adult cabbage aphids transmitted at about twice the rate of nymphs, whereas nymphs of the turnip aphid transmitted the virus at more than four times the rate of adults.