Specificity of Host-pathogen Interaction of Banana Bunchy Top Disease
An attempt was made to investigate host-vector relationship of Banana
Bunchy Top Disease. The affinity of different host plants was investigated
via black banana aphid (Penlalonia nigronervosai for the transmission
of BBTV to Canna (Canna indica), Cucumber (Cucumis sativus),
Tobacco (Nicotiana tabacum cv. Samsun), Chenopodium
(Chenopodium amranticotor) and Cotton (Gossypium hirsutum).
The host plants, at 3-4 leaf stage were exposed to viruliferous P.
nigronervosa for 24 hours. Similarly four different insect-vectors
viz. Aphis gossypii, Myzus persicae, fiophalosiphum padj and BemisSa
tsbaci, beside P. nigronervosa were tried for transmission
studies under controlled conditions. The vectors were allowed inoculation
access period of 24 hours following an acquisition-feeding period of 8-10
days in separate cages on healthy banana. None of the vectors except P.
nigronervosa was found to transmit BBTV to banana. Likewise P.
nigronervosa was also found restricted to its original host banana
for propagation and BBTV transmission.
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