Weed Management

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A patch of highway iceplant, Carpobrotus edulis. Photo by Mitch Barrie, Flickr.com.
Pests in the Urban Landscape: Article

Invasive Spotlight: Highway Iceplant

June 5, 2023
By Lauren Fordyce
You've probably seen this invasive plant growing along highways or the coast in California. Highway iceplant, Carpobrotus edulis, was intentionally introduced to prevent soil erosion along highways and coasts but it has since invaded many different ecosystems and outcompetes native plant species.
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Figure 2. Visual rating of phytotoxicity to grasses (A) and broadleaves (B) from herbicides used in the Sacramento trial. Arrows indicate second and third repeat applications after the initial treatment.
Pests in the Urban Landscape: Article

Organic Herbicides for Weed Control in Urban Landscapes

March 30, 2023
By Karey Windbiel-Rojas
Weed management in landscaped areas can be challenging. Weeds may need to be controlled for public safety, fire reduction, aesthetics, and elimination of harborage for other pests.
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Blooming Bermuda buttercup next to a residential fence.
Pests in the Urban Landscape: Article

Weeds in Landscape Plantings

January 25, 2023
[Originally featured in the Winter 2022 Issue of UC IPM's Green Bulletin Newsletter] Weeds can be a problem in any landscaped areas including around trees, shrubs, flower beds, or lawns and turf.
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Wild blackberries growing along a roadway and encroaching into the home landscape. [Credit: Scott Oneto]
Pests in the Urban Landscape: Article

When Blackberries Go Wild

November 4, 2022
Ripe, juicy, sweet blackberries: what's not to love? Blackberries are grown for us to eat and enjoy, but some species can be considered weeds when they take over home landscapes, roadsides and waterways, and other areas.
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Mature dallisgrass plant, Paspalum dilatatum. [Credit: K Windbiel-Rojas]
Pests in the Urban Landscape: Article

Oh Dallisgrass

October 4, 2022
By Lauren Fordyce
Knowing what weedy grass you have in your lawn or landscape is very important in being able to properly control it. Dallisgrass is a common perennial weed that is easily identified and grows in uneven clumps in lawns and turf.
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Pampasgrass infestation in a coastal area.
Pests in the Urban Landscape: Article

Invasive Pest Spotlight: Pampasgrass & Jubatagrass

July 8, 2022
By Belinda Messenger-Sikes, Karey Windbiel-Rojas
Pampasgrass and jubatagrass facts Pampasgrass (Cortaderia selloana) is a common ornamental landscape plant that readily naturalizes throughout California's coastal areas and some interior regions.
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Mature plantain plant in a lawn.
Pests in the Urban Landscape: Article

Controlling Weeds Webinar, 7/21

July 8, 2022
By Karey Windbiel-Rojas
Looking for ways to manage weeds in your lawn or landscape? Join us on July 21, 2022 at noon for UC IPM's free monthly webinar to learn about how to control weeds using mostly nonchemical methods.
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A mature, parasitic broadleaf mistletoe plant that is bright green on a bare tree branch.
Pests in the Urban Landscape: Article

Mistletoe: parasitic plant or bird food?

March 2, 2022
By Belinda Messenger-Sikes
All mistletoes infest and grow as parasites on trees and large shrubs. In some cases, the host plant can be severely damaged. But recent studies have shown that broadleaf mistletoes can shelter and feed wildlife, including birds and small mammals.
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Buttercup oxalis (Cedit: Jack Kelly Clark)
Pests in the Urban Landscape: Article

Common Winter Weeds

January 25, 2022
By Karey Windbiel-Rojas
Recent wet weather in many parts of the state has spurred emergence of winter weeds. How these weeds are managed varies by the type of weed and where it's growing. In IPM, identification is always the first step toward effective pest management.
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