University of Maryland Extension

grapes

Crop Development Sampling

Timely Viticulture - Pre-Harvest
It is critical to properly monitor and assess fruit maturity characteristics to make the appropriate management, harvesting, and winemaking decisions to produce the best quality grapes and wine possible. The first step to assess ripeness and quality is to take a proper sample that best represents...

Canopy Management - Shoot Thinning and Positioning

Timely Viticulture - Pre-Bloom
Managing excessive vine vigor is one the greatest battles in Eastern viticulture and this problem is exacerbated in seasons with high rainfall and warm spring temperatures. Many vigorous varieties and variety/rootstock combinations are quickly beginning to increase in shoot length. Obviously there...

Avoiding Injury to Grapes From Off Target Herbicide Exposure

Timely Viticulture - Pre-Bloom
Over the past few years there have been quite few cases in Maryland of injury to grapevines from herbicides that were sprayed to control weeds before planting crops on adjacent or nearby fields. Damage has ranged from some minimal leaf distortion through severe damage, crop loss, and vine death...

Early Season Insect Management: Flea Beetles

Timely Viticulture: Pre Bloom
Identification and Biology Grape Flea beetles, Altica spp. (Coleoptera: Chrysomelidae), are small (4-5 mm), oval shaped, metallic blue-purple beetles that jump when disturbed. Grape flea beetles overwinter as adults and become active on warm April days when grape buds begin to swell. Adult beetles...

Final Pruning, Pre-emergence Herbicides, and Planting New Vines

Timely Viticulture Timeline - Dormant
Final Pruning Most have finished or already finished pruning. Remember, if you have a site where there is a history or severe risk of bud damage from late frosts with early budding varieties (such as ‘Chardonnay’), it is best to prune those last as this will help to delay bud break. You can also...

2019 Bay Area Fruit Meeting - Save the Date

Friday, Feb. 22, 2019 (All day)
Wye Research and Education Center
Click HERE to Register Online

Spotted Lanternfly

The spotted lanternfly ( Lycorma delicatula ) is a new invasive pest insect in the Mid-Atlantic. It has the potential to be an important pest on several important crops. It has been detected in several states that border Maryland, but has not yet been detected in Maryland. This publication...

Balanced Pruning 3: Pre-Pruning

Timely Viticulture - Dormant
Timely Viticulture Update: February 26, 2018 “Timely Viticulture” Balanced Pruning 2 dealt with the timing of pruning relative to dormancy, deacclimation, and bud break. The best thing to do is to try to delay pruning as long as practically possible. If you could accomplish all of your pruning in...

Assessing Grapevine Bud Damage

Timely Viticulture Timeline - Dormant
Timely Viticulture Updated: February 26, 2018 Damage from low winter temperatures is arguably the greatest risk to sustainable profitable winegrape production in the eastern US. The majority of Maryland vineyards have not experienced a significant amount of low temperature damage over the past...

Understanding Grapevine Bud Damage

Timely Viticulture Timeline - Dormant
Timely Viticulture Update: February 26, 2018 Damage from low winter temperatures is arguably the greatest risk to sustainable profitable winegrape production in the eastern US. The majority of Maryland vineyards had not experienced a significant amount of low temperature damage over the past decade...

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