Grapevine crown gall (GCG), which is caused by tumorigenic Allorhizobium vitis (=Rhizobium vitis), the most important bacterial disease in grapevine, and its economic impact on grapevine very high. When young vines develop GCG, they often die, whereas older may show stress poor growth depending severity of because GCG interferes with vascular system trunk prevents nutrient flow, leading to infe...