Detection of Barley yellow dwarf virus in Poa cookii sampled at various Kerguelen Islands sites and concomitant presence of Rhopalosiphum padi.

aResults are a combination of immune tissue printing and RT-PCR for detection of BYDV.bthe abundance of R. padi is indicated using the following code: 0 = not observed; 1 = present in low numbers; 2 = locally abundant; nt: missing data.cabundance of R. padi variable depending of the observation year.