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Symptoms of potassium deficiency.
Assessing and Managing Potassium Concentration in the Vineyard - Articles Articles
Potassium (K) plays a critical role in many plant physiology and biochemistry processes such as photosynthesis, osmoregulation, and enzyme activation. More
Spotted Lanternfly Grape Pest Alert
Spotted Lanternfly Grape Pest Alert - Articles Articles

Spotted Lanternfly Grape Pest Alert

Heather L Leach, Michela Centinari, Ph.D.

This fact sheet provides identification, damage, quarantine, and management information for the spotted lanternfly, an invasive sap-feeding planthopper that feeds on the vine trunk, shoots, and leaves of grape plants, among other crops. More
Freeze damage on Concord. Photo: Michela Centinari, Penn State
Understanding and Preventing Spring Frost and Freeze Damage - Articles Articles
When early spring warming is followed by below freezing temperatures, grape growers keep their fingers crossed hoping to escape freeze injury. More
Cold damage at Lake Erie Regional Grape Research and Extension Center vineyard. In the front: cold sensitive Syrah (V. vinifera L.) vine killed back to the ground. In the back: Healthy cold hardy Marquette (Vitis spp.) vines.
Grapevine Cold Injury - Articles Articles

Grapevine Cold Injury

Michela Centinari, Ph.D.

The extent of damage and crop losses to cold injury often vary among regions, individual vineyard sites, and wine grape varieties. More
Tasting Room Employee Sensory Training
Tasting Room Employee Sensory Training - Articles Articles

Tasting Room Employee Sensory Training

Michela Centinari, Ph.D.

Understanding wine sensory evaluation to better adapt to consumer preferences aids in producing wines that will be sold successfully in the wine market. More
Cold Stabilization Options for Wineries
Cold Stabilization Options for Wineries - Articles Articles

Cold Stabilization Options for Wineries

Michela Centinari, Ph.D.

The following article will explore the use of cold stabilization in winemaking as a means of adjusting wine quality. More
Why Measure YAN? Variation in YAN Data Over a 6 Year Time Period
Why Measure YAN? Variation in YAN Data Over a 6 Year Time Period - Articles Articles
YAN data from the same vineyard site was collected from 2006 to 2011 to emphasize vintage variation in YAN and a need for annual YAN testing. More
Enological Products and Their Uses
Enological Products and Their Uses - Articles Articles

Enological Products and Their Uses

Michela Centinari, Ph.D.

This article provides information on the basic enology additives: Fermentation Nutrients, Enological Tannins, Polysaccharides or Inactivated Yeasts, and Fining Agents. More
An Introduction on Low Temperature Fermentation in Wine Production
An Introduction on Low Temperature Fermentation in Wine Production - Articles Articles
Many notable wine regions have been recognized with an integrated use of temperature control, as this processing aid has been shown to improve wine quality dramatically. More