Transmission of Barley Yellow Dwarf Virus Isolates by the Aphid Rhopalosiphum Insertum (Walker)
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Barley yellow dwarf virus (BYDV) is persistently transmitted by at least 18 species of aphids throughout the world(l,2,3). There are many strains of the virus that vary in level and spectrum of virulence, host range and vector specificity(1,3). Because of the close taxonomic similarities of Rhopalosiphum insertum (Walker) (RI) and R.padi (L.) (RP), the two vector species have been confused or lumped together as a complex(2,3,4,5). In view of their importance in the epiphytology of BYDV, we have investigated their ability to transmit different vector-specific and non-specific BYDV isolates.
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