Botrytis bunch rot and blight of leaves, shoots and blossom clusters, also called gray mold, occurs throughout the viticultural world. The fungus causing the disease grows and reproduces on senescent or dead plant tissue. ...

The banded grape bug is a sporadic, early-season pest of grapes that feeds on clusters between bud break and bloom. It damages grapes during the period of rapid shoot expansion and flower cluster development. Injury by the ...

Three leafhopper species can be found feeding on grapes in the Northeast: Erythroneura comes (Say), commonly known as the grape leafhopper (GLH), E. tricincta Fitch, the threebanded leafhopper, and Empoasca fabae (Harris), ...

The grape rootworm (abbreviated GR) is a native species of leaf beetle that occurs from the Atlantic Seaboard states to North Dakota, Nebraska, Kansas, and Texas. The wild hosts of this pest are grapes (Vitis spp.), Virginia ...

Crown gall of grape is an important disease in all areas where grapes are grown worldwide, but is particularly severe in regions with cold climates. Formerly designated as Agrobacterium tumefaciens biovar 3, A. vitis, the ...

The name “cutworm” is applied to a large number of larvae of lepidopterous species in the family Noctuidae. The moths are night flyers and the larvae are night feeders. Both stages hide during the day. Many of the cutworm ...

The grape cane gall maker is one of two Ampeloglypter species which can damage new shoot growth in the spring. This small snout beetle is apparently present throughout eastern and midwestern North America and has caused ...

Grapevine red blotch disease (GRBD) is a recently recognized viral disease. It was first described on Vitis vinifera cv. Cabernet Sauvignon at the University of California Oakville Research Field Station in 2008, but the ...

Powdery mildew (PM) is perhaps the most important fungal disease of grapevines worldwide. This disease is native to eastern North America, but gained notoriety when it was introduced into European vineyards in 1845, causing ...

Black rot is an important fungal disease of grapes that originated in eastern North America, but which now occurs in portions of Europe, South America, and Asia as well. It can cause complete crop loss in warm, humid ...