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May 2025Archived

 

Field picture submitted by Elizabeth Fichtner

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UC Cooperative Extension Napa County: Page

LAMP-GRBV Assay

LAMP (loop mediated isothermal amplification) is a DNA- based assay that has been developed for the detection of GRBV (Romero Romero et al. 2019). The assay can be performed "in-house", and does not require special facilities, expensive equipment or highly trained laboratory personnel. LAMP testing…
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UC Cooperative Extension Napa County: Page

Grapevine Red Blotch Disease

GRBD is a vector-transmitted viral disease of grapevine disease that affects pH, sugar and phenolic accumulation (Blanco-Ulate et al. 2017; Girardello et al. 2019) & ultimately reduces wine quality. Grapevine red blotch virus (GRBV) is the causal agent of Red blotch disease (GRBD).Distinguish visual…
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UC Cooperative Extension Napa County: Page

Pierce's Disease

Pierce’s disease (PD) is caused by the pathogen Xylella fastidiosa subsp. fastidiosa, a xylem-limited bacterium that affects water transport in the host. Xylella fastidiosa is transmitted by xylem-feeding insects: sharpshooters and spittlebugs.Important concepts of disease ecology inform management. (PDF 566…
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UC Cooperative Extension Napa County: Page

Argentine Ant Managment

Reducing Argentine ant populations is a key aspect of an integrated program for sap-feeding insects, including mealybugs. Tending ants interfere with biocontrol organisms, reducing parasitism rates in heavily ant-tended vineyards. Learn to identify various vineyard ant species in English (PDF 771…
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UC Cooperative Extension Napa County: Page

Vineyard Leafhoppers

There are three species of leafhoppers (Erythroneura) in Napa County vineyards; Western grape, Virginia creeper, and Variegated leafhopper. Adults and nymphs damage vines by feeding in the leaf mesophyll, giving leaves a white speckled appearance. Learn to identify vineyard leafhoppers. (PDF 1.9 MB…
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UC Cooperative Extension Napa County: Page

Vineyard Mealybugs

The three most important mealybugs in the North Coast are vine mealybug (VMB), grape mealybug (GMB), and obscure mealybug (OMB). Gill's and long-tailed mealybug are present in other regions, but not prevalent in the north coast. Mealybugs can be found anywhere on the vine (trunks, cordons, leaves, etc.)…
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Busy Gardener – Month to Month - Westminister
UC Master Gardeners of Orange County: Event

The Thoughtful Gardener - Fullerton

Jul 15, 2026

Did you every wonder why you garden? Dream of the perfect garden? Wish that dream could be reality? Then let the UC Master Gardeners of Orange County take you on a journey through your gardening expectations, including selecting the right plant for the right place, best practices for managing your…
UC Master Gardeners of Orange County
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Create a Salad Bowl Garden - Garden Grove
UC Master Gardeners of Orange County: Event

Plant A Salad Bowl Garden - Stanton

Jul 13, 2026

Ah, the salad days of life! Grow your own salad in one compact place. UC Master Gardeners of Orange County will provide information on how to plant a salad bowl garden, covering the varieties of greens, the basics of gardening, and care and harvesting. Add a review on starting from seed and from…
UC Master Gardeners of Orange County
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Herbs
UC Master Gardeners of Orange County: Event

Herbs - Anaheim

Jul 12, 2026

Imagine being able to harvest herbs as you need them right outside your kitchen door . . . or even from your kitchen counter. Learn about growing herbs in containers – even in a pumpkin! – for use in cooking or for enjoyment in your garden. From the mundane to the exotic, UC Master Gardeners of Orange…
UC Master Gardeners of Orange County
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Small spaces
UC Master Gardeners of Orange County: Event

Gardening in Small Spaces - Westminster

Jul 11, 2026

If you plan it, you can do it. Discover tips and tricks to transform your gardening space, no matter how small, using ornamental plants. Enhance your garden to make an impact with various shapes, textures, and colors of plants. UC Master Gardeners of Orange County will discuss soil, integrated pest…
UC Master Gardeners of Orange County
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