Pierce's disease of grapevine
Xylella fastidiosa is a gram-negative bacterium which is limited to xylem tissue. It has many hosts, many of which show minor or no symptoms. More and [...] more rapidly in young trees than in older trees. In the latter, it may stay limited to certain branches. When the leaves mature, slightly raised gummy [...] fruit set in peach does not occur in citrus, there is no difference between infected and healthy trees. Normal fruit abortion does not happen so total