SIX YEAR RESULTS WITH TWO APRICOT CULTIVARS ON TWELWE ROOTSTOCKS
The attention given this problem is justified by the great variability in apricot behaviour and consequently by the need to determine both the adaptability of the rootstocks (seedlings or clonals : apricot, myrobolan, peach, european plum, etc.) to varied environmental and geographical conditions as well as the degree of compatibility or incompatibility between these rootstocks and the locally used cultivars.
The problem of incompatibility is linked to the more complex question of decline and die-back and consequently to the pathological factors which may cause these disease processes (virus, mycoplasma, bacteria, etc.). The relationship between incompatibility and these disease processes is still an open question through it has been widely debated in the past at important scientific congresses, such as the XVIth Int. Hort. Congress of Brussels in 1962 and the IVth Int. Symposium on the Apricot and apricot culture in 1968.
This paper is the second report on the behaviour of 12 rootstocks of various species and origins essayed in a typical