TY  - JA
AU  - Bayon,F.
AU  - Ayrault,J.P.
AU  - Pichon,P.
TI  - Role des cultures de ray grass dans l epidemiologie de la jaunisse nanisante de l orge (VJNO or BYDV) en poitou charentes
PY  - 1983///
KW  - Barley yellow dwarf virus
KW  - Cereals
KW  - AGROVOC
KW  - Crops
KW  - Elisa
KW  - Epidemiology
KW  - Feed crops
KW  - Lolium
KW  - Rhopalosiphum
N1  - Tables, graphs, references p. 810-811
N2  - In a study in Poitou-Charentes, France, on the transmission of barley yellowdwarf virus in winter barley, the relative significance of the origin of the vector Rhopalosiphum padi (L.) from spontaneous regrowth of the same crop or from rye-grass [Lolium perenne], and of the length of time spent by the aphid onthe barley, are discussed in relation to the efficiency of transmission and the severity of symptoms. In field tests involving artificial infestation, aphids with a high rate of infection originating from self-sown barley and placed at a rate of 5 aphids/plant on young healthy barley infected it with the virus within20 days, whereas aphids originating from
T2  - Mededelingen van de Faculteit Landbouwwetenschappen, Rijksuniversiteit
ER  -