Introduction: Most grapevines are very susceptible to various fungal diseases. These diseases affect leaves, shoots, and fruit. Leaf diseases can drastically reduce photosynthesis, and, in extreme cases, can cause defoliation. Fungal diseases can render fruit unusable and can very easily cause severe losses in yield. It is important to distinguish between the three broad categories of grapevine...

INTRODUCTION Crown gall on grape, caused by the bacterium Agrobacterium vitis, occurs throughout the world where grapes are grown. In Pennsylvania and New York, crown gall can lead to vine decline and mortality in vineyards (Stewart & Wenner, 2004). Grapevines grown in areas subject to freezing winter temperatures are especially vulnerable to crown gall because freeze injuries provide a wou...

The diseases and arthropods that attack blueberries can inflict severe production losses to growers by lowering yield, reducing quality, and shortening the life of a stand. Although nearly 200 diseases and more than 300 insect species have been reported on blueberries, only 20 to 25 ever become abundant enough to cause economic losses, and only 5 or 6 of these are chronic problems that require ...

Introduction: Black rot of grape, Guignardia bidwellii (Ellis) Viala and Ravaz, is an important fungal disease in home vineyards on Long Island. It can cause complete crop loss. There is a wide variation in susceptibility to this disease among native American and hybrid cultivars, where as all common cultivars of Vitis vinifera appear to be highly susceptible. Symptoms and Signs: All green tiss...

Netting Techniques for Vineyards: I would suggest using 14′ over the top netting to protect your fruit from the birds. The 7′ side netting is only practical for lower pressure sites. Use of “S” Hooks Or Zip Ties for Securing Net We have used “S” hooks to secure the net off the ground both around the poles and around the trunks. See PDF on site named “Netting Process for Vineyards” for more deta...

It’s (past) time once again for what has heretofore been a nearly annual update and review on controlling the fungal diseases that grape growers must regularly contend with in our eastern climate. As always, I’d like to acknowledge the outstanding team of grape pathologists here in Geneva, which includes bacteriologists (Tom Burr’s program) and virologists (Marc Fuchs’s program) in addition to ...

Double A Vineyards offers a variety of Fungicides, Insecticides, and Herbicides. There are many things to consider when selecting which pesticide to use including but not limited to, what it controls, whether it is pre- or post-emergent, Contact or systematic, broad spectrum, application restrictions, and effectiveness. Please note the information included in the following charts is as taken fr...