Analysis of Xylem Fluid Components in Almond Cultivars Differing in Resistance to Almond Leaf Scorch Disease.

Almond leaf scorch (ALS) is caused by the pathogenic bacterium Xylella fastidiosa and poses a threat to the California almond industry. Almond cultivars are differentially resistant or susceptible to ALS. X.

Influence of Inoculation Date on the Colonization of Xylella fastidiosa and the Persistence of Almond Leaf Scorch Disease Among Almond Cultivars.

Field grown 2-year-old almond trees (Prunus dulcis cvs. Butte, Carmel, Mission, Ne Plus Ultra, Padre, Peerless, Price, Solano, Sonora, and Thompson) were mechanically inoculated with Xylella fastidiosa in the growing seasons of 2002 and 2003 to study the effect of inoculation date on the movement and colonization of X. fastidiosa and the overwintering persistence of almond leaf scorch disease (ALS) in these cultivars.