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 Grape Leafhopper Photo by Bob Hammon, CSUE retired Entomologist

Grape Leafhopper (Erythroneura spp.) Factsheet for Colorado producers available now. Access HERE.

2,4-D damage on developing shoot tip of grapes. Photo courtesy of Purdue University.

There have been a number of inquiries about suspected herbicide damage. Plant growth regulators, such as 2,4-D, are commonly used to control broadleaf weeds in lawns, golf courses, right-of-ways and agricultural fields, and they can travel to unintended targets via drift. Grapes are highly sensitive to this group of herbicides, 2,4-D being the most common culprit. Help prevent your grapes from being damaged by communicating with your neighbors, local pesticide applicators and landowners. Further information can be found here: Avoiding 2,4-D Injury to Grapevines.


Phylloxera on grapevine root. Photo courtesy of Melissa Franklin, Colorado State University.

The presence of grape phylloxera, a microscopic insect known to cause moderate damage to grape leaves and severe damage to grape roots, has been confirmed in a number of vineyards in Colorado. For information on how to identify this insect in your vineyard, measures that can be taken to help prevent the entry of this insect into your vineyard, and what to do if you have identified phylloxera in your vineyard, please see the Colorado Grape Phylloxera Action Bulletin.


THE COST OF GROWING GRAPES IN WESTERN COLORADO

An economic analysis of ‘The Cost of Growing Grapes in Western Colorado’ took place in 2010 including estimated vineyard establishment costs and vineyard production costs for the first 10 years of production as well as an analysis of potential profitability. See here: The Cost of Growing Grapes in Western Colorado.