Aphis citricola van der Goot - a new vector of citrus tristeza virus in India.
Aphis citricola v.d. Goot is known to infest citrus and also Tridax procumbens, a weed found in citrus orchards in Karnataka State (India). During a recent survey in Karnataka and Kerala, A. citricola was also observed to attack Malpighia glabra and Chromolaena odorata (Eupatorium odoratum) in April-August. In transmission tests with this aphid reared on orange and using citrus tristeza virus originating from Coorg mandarin (Citrus reticulata), the insect was able to acquire the virus and transmit it at the rate of 8% to healthy plants of acid lime (C. aurantifolia), which then showed leaf cupping, vein-clearing and stem-pitting symptoms of the severe isolate of tristeza. The identity of the virus was confirmed by reinoculation to further healthy seedlings of C. aurantifolia by means of Toxoptera citricida (Kirk.).