Pests And Weeds

UC Master Gardener Program of Alameda County: Page

Enchanting Plants or Garden Thugs?

Learn about garden thugs—ornamental plants that become invasive under the right conditions and spread aggressively, disrupting your garden and your neighbor's.
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UCCE Central Sierra: Page

Central Sierra: Calendar

UC Central Sierra programming includes virtual and on-line training as well as in-person classes and workshops in Amador, Calaveras, El Dorado, and Tuolumne Counties.
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UCCE Humboldt - Del Norte Counties: Page

Invasive Plant Species

Invasive plants are one of the greatest threats to croplands, rangelands, aquatic areas, and wildlands in the United States; they degrade the productivity and biological diversity of all ecosystems. Below are the sixteen most harmful weeds in Humboldt County.
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A person looking at a bottle of 20% acetic acid vinegar weed killer with a signal word DANGER.
Pests in the Urban Landscape: Article

Can I Use Vinegar to Control Weeds?

July 18, 2024
By Lauren Fordyce
Acetic acid, also known as vinegar, is used in products for weed control. Many people choose it because it is natural. However, acetic acid can damage skin and eyes, especially at concentrations commonly found in weed killers.
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A small green plant with long, narrow leaves in a bed of brown wood bark mulch.
Pests in the Urban Landscape: Article

Nutsedge—Yes, We Hate It Too!

June 26, 2024
By Belinda Messenger-Sikes
Nutsedges are aggressive and persistent weeds that commonly infest lawns, vegetable and flower gardens, and landscapes. These perennial sedges are a problem in lawns because they grow faster than turfgrasses and result in non-uniform turf.
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A hand holding a dark green aquatic plant.
Pests in the Urban Landscape: Article

Invasive Pest Spotlight: Hydrilla

June 5, 2024
By Lauren Fordyce
Hydrilla (Hydrilla verticillata) is an invasive, aquatic weed that can be found in many slow-moving fresh water bodies in California. The plant forms large mats that can crowd out native plants, restrict water flow, and interfere with boating and fishing.
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Pests in the Urban Landscape: Article

Need Help Identifying Weeds?

March 26, 2024
By Karey Windbiel-Rojas
After all the winter rains you may find yourself dealing with weeds and struggling to control them. The first step in successfully controlling weeds is knowing what weed you have.
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