Title: Some Effects of Temperature on the Transmission of Cabbage Mosaic Virus by Myzus persicae1
Abstract: Apterae of the green peach aphid, Myzus persicae (Sulzer), transmitted a strain of the cabbage mosaic virus from and to yellow mustard, Brassica campestris L., at all temperatures tested from 40°F to 90°F. The time taken by the aphids to begin probing decreased with increasing temperature, reaching a minimum in the 70°-90°F range. The duration of the naturally terminated probes tended to minimize at 70°F and above, and the frequency of probes lasting for more than a minute increased as the temperature varied on either side of 70 °F. Virus acquisition was most efficient in the temperature range of 60°-80° F, with efficiency falling with temperatures outside of this interval. The efficiency of inoculation increased with increasing temperature over the entire range tested (40°-90°F). The percentage of infection was not reduced when test plants, immediately after inoculation at room temperature, were held for 24 hr at 41°, 50°, 68°, and 86°F. or for 4 days at 68° and 86°F, but the incubation period of the disease was altered. Serial transmission trials were made at 50° 60°, and 70°F. In these, the aphids probed fewer plants before making a “feeding” penetration at 50° than at 60° or 70°F. “Feeding” penetrations had a higher probability of resulting in infection than did brief probes (≤60 sec), and they eliminated the inoculative potential. The rate at which inoculativity declined during fasting periods was greater at 30°C than at 10° or 20° C, and it followed first order kinetics only if measured at times longer than 15 min after acquisition.
Publication Year: 1964
Publication Date: 1964-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 8
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