Grapevine leafroll disease (GLD) and grapevine red blotch disease (GRBD) are growing threats to the California wine and wine grape sector, which contributes $73 billion annually to the state’s economy. This book is derived from the most extensive research ever published on this topic. It provides a high level analysis of the advancement of the diseases in California vineyards, vectors of growth and resistance, and offers the most advanced management strategies available.