A survey of aphid-borne Wuses of maize was conducted during the years 1998, 1999 and 2000 in 5 localities scattered over the Po valley and in the North-East plane. Each experimental field contained, among others, maize lines well known for their high susceptibility to maize potyvimes and luteoviruses in two replicates with 16-30 plants per plot. Al1 plants of these lines were inspected for virus symptoms in mid June and mid August, and sampled. Leaf samples were later analysed by enzyme-linked immunosorbent assay (ELISA) for the presence of maize dwarf mosaic-A (MDMV-A) and sugarcane mosaic potyvirus (SCMV), and barley yellow dwarfviruses PAV, MAV, SGV and RMV, and cereal yellow dwarf virus (CYDV). MDMV-A was the prevalent virus in S. Angelo Lodigiano and Lonigo, where it peaked to over 70%. In the same localities, SCMV incidence was about 1/10 that of MDMV-A. Among Luteoviridae, PAV and MAV were the most detected viruses in Bergamo and Torino (ranging between 10 and 50%), in the years 1999 and 2000. In the same years, PAV had an incidence over 10 % in S. Angelo, where it was present in mixed infections with potyviruses. CYDV, RMV, and SGV had mostly very low incidences. In 1998, though, when incidences of PAV and MAV where very low everywhere, different combinations of CYDV, RMV, and SGV infectecl about 15% of the test plants in Bergamo, Lonigo, and Torino, The field in the north-east was essentially unaffected by viruses during 1998 and 1999, and it was not sampled in the year 2000.
A three-year survey of aphid-borne viruses of maize in Northern Italy.
CACIAGLI P;MARIAN D;
2002
Abstract
A survey of aphid-borne Wuses of maize was conducted during the years 1998, 1999 and 2000 in 5 localities scattered over the Po valley and in the North-East plane. Each experimental field contained, among others, maize lines well known for their high susceptibility to maize potyvimes and luteoviruses in two replicates with 16-30 plants per plot. Al1 plants of these lines were inspected for virus symptoms in mid June and mid August, and sampled. Leaf samples were later analysed by enzyme-linked immunosorbent assay (ELISA) for the presence of maize dwarf mosaic-A (MDMV-A) and sugarcane mosaic potyvirus (SCMV), and barley yellow dwarfviruses PAV, MAV, SGV and RMV, and cereal yellow dwarf virus (CYDV). MDMV-A was the prevalent virus in S. Angelo Lodigiano and Lonigo, where it peaked to over 70%. In the same localities, SCMV incidence was about 1/10 that of MDMV-A. Among Luteoviridae, PAV and MAV were the most detected viruses in Bergamo and Torino (ranging between 10 and 50%), in the years 1999 and 2000. In the same years, PAV had an incidence over 10 % in S. Angelo, where it was present in mixed infections with potyviruses. CYDV, RMV, and SGV had mostly very low incidences. In 1998, though, when incidences of PAV and MAV where very low everywhere, different combinations of CYDV, RMV, and SGV infectecl about 15% of the test plants in Bergamo, Lonigo, and Torino, The field in the north-east was essentially unaffected by viruses during 1998 and 1999, and it was not sampled in the year 2000.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
