Weed Control

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Buttercup oxalis (Cedit: Jack Kelly Clark)
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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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Invasive pampasgrass (Credit: J DiTomaso)
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What makes a weed an invasive plant?

November 18, 2020
By Belinda Messenger-Sikes, Karey Windbiel-Rojas
Weeds are usually thought of as native plants we don't want in areas such as landscapes, fields, or vegetable gardens either because they reduce economic output or they are considered aesthetically displeasing.
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Patch of bermudagrass surrounded by bare soil and foliage.
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Fall Weed Management in Lawns and Landscapes

October 14, 2020
By Karey Windbiel-Rojas
As the days get shorter and the temperatures begin to cool, now is the time to practice weed management for annual cool-season weeds. It's also not too early to consider management for weeds that emerge in springtime.
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Green pokeweed seedlings sprouting up in dirt.
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Pokeweed: A Growing Weed Problem

September 17, 2020
By Belinda Messenger-Sikes
American pokeweed is a large weedy shrub also known as pokeberry, American nightshade, poke salad, and a variety of other names. It is native to the eastern U.S. but is spreading in parts of California.
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French broom, <i>Genista monspessulana</i>, invading a hillside near Bodega Bay, California. (Credit: B Rice)
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Invasive Spotlight: Brooms

June 13, 2020
Brooms are shrubs which were originally planted in California as ornamentals and for erosion control, but are now considered to be invasive weeds since they are highly competitive. They crowd out native plants and form impenetrable barriers to wildlife.
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Yellow nutsedge growing through a shallow layer of mulch.<br>(Credit: Jack Kelly Clark)
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April Gardening Tips: Weeding

April 24, 2020
As you practice social distancing during COVID-19, you may find yourself spending more time in the garden. As we move into nice weather, we are sharing a few gardening tips for pest management. Manage weeds using nonchemical methods such as cultivation, handweeding, or mowing.
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Rosettes and flowers of broadleaf plantain, Plantago major.<br>(Credit: K Windbiel-Rojas)
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Plantain weeds Pest Notes updated

February 26, 2020
Plantains are common weeds in lawns, athletic fields, ornamental plantings, roadsides, and pastures. Two species, broadleaf and buckhorn plantains (Plantago major and P. lanceolate) are commonly found throughout California year-round.
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Foliage and fruit of broadleaf mistletoe.<br>(Credit: Jack Kelly Clark)
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Underneath the Mistletoe

December 15, 2019
Mistletoe is a familiar sight of the season, often found wrapped in ribbon and hung for certain festivities this time of year. But did you know it is actually a parasitic plant that grows on a number of landscape trees in California? There are two types of mistletoe in California.
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