COMPARISON OF TWELVE PRUNUS STRAINS AND ISOLATES OF THE ILARVIRUS GROUP
The purpose of this study was :
- to test those indicators for rapidity of response, reliability, polyvalence, and capacity to differentiate between viral strains,
- to demonstrate the importance of the genetic nature of the infected plant on the significance of the detection tests used,
- to establish an index of severity for the isolates studied in the species P. persica.
P. persica line GF 305, P. serrulata cv. Shirofugen, and Cucumissativus remain the most effective indicators.
P. persica and P. tomentosa appears to provide the best sources of infection.
Four groups of severity index have been defined as a result of studies carried out in our station.