Studies on Natural Transmission of Papaya ringspot virus disease in Eastern Uttar Pradesh
2010
Singh, Vimla | Singh, Devendra
The natural spread of papaya ring spot virus (PRSV) disease in the eastern Uttar Pradesh region occurs by aphid vectors which transmit the disease through wounds created during sucking of sap for feeding. Five aphid vectors viz. Aphis craccivora, A. gossypii, A. citricola, Myzus persicae and Rhopalosiphum maidis, were very common in the surveyed areas. The present investigation was undertaken to evaluate the most efficient vector for natural transmission of papaya ring spot disease to Carica papaya. L.and to study the virus_ vector relationship. Myzus persicae, was the most efficient (transmitting 70 disease within 12 days after inoculation feeding with severe ring spot and distortion of symptoms on foliage). It could acquire the virus without any pre- acquisition fasting, and showed a decline in transmission after 4 hrs of pre- acquisition fasting. It could acquire the virus in just 30 seconds of acquisition feeding with optimum at 3 min., the transmission efficiency showed a decline with further increase in acquisition feeding. The aphid could readily transmit PRSV after 2 min. of infection feeding with an optimum transmission after 6 min. of infection feeding. The virus was totally inactivated at 4 hrs of post- acquisition fasting. M. persicae ceased to be infective very soon and could infect not more than 2 plants in succession revealing "non persistent nature" stylet borne nature of PRSV.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Indian Council of Agricultural Research