It has been several years since Pierce’s disease (PD), the debilitating grapevine disease caused by the bacterium Xylella fastidiosa, has caused significant problems for San Joaquin Valley vineyards. PD dropped off the radar of valley grape industries and growers partly due to other invasive grape pests (vine mealybug, EGVM, etc.) inhabiting vineyards and to a low incidence of PD found throughout the valley. However, in recent months glassy-winged sharpshooter (GWSS) has been trapped in...