Pest Management & Plant Health

UC Master Gardeners of El Dorado County: Article

Central Sierra: Weeds - Friend or Foe?

August 3, 2026
By UC Master Gardeners of Central Sierra
How to distinguish between the three types of weeds on your property  Isn’t it funny when you look at children that you have not seen in a while, you usually say, “These kids have grown like weeds.” You don’t say that they have grown like a plant. You and I did not make that saying up; the truth is…
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cut logs can harbor tree-killing insects

Hiring an Arborist: What to Know to Make Informed Tree Care Decisions

July 31, 2026
By Beatriz E Nobua Behrmann
Trees are long-lived resources that provide environmental, aesthetic, and community benefits. When a tree shows signs of decline, damage, or pest infestation, it is common to seek help from a tree care professional. While professional tree care is essential in many situations, the quality and appropriateness…
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blacklegged tick on a leaf

Watch Out for Ticks

July 22, 2026
By Yulie Velez
Blood-sucking ticks can spread bacteria and other germs when they bite, causing diseases like Lyme disease in people and pets. Fortunately, a few simple precautions can go a long way in reducing your exposure to ticks. Preventing Tick BitesTicks are efficient hitchhikers—they can easily latch on to your…
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Image of the yellow flower of oblong splurge.
UC Master Gardeners of Tuolumne County: Article

Euphorbia Oblongata: Oblong Splurge in Tuolumne County

July 18, 2026
Noxious weed! This “cute” perennial plant grows about 3 feet tall, displaces desirable vegetation, and reduces the biodiversity of our native ecosystems. It was introduced from southern Europe as an attractive ornamental. But it has no natural deterrents, takes over natural habitats, and is quite invasive…
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Puncturevine has yellow flowers, J. Alosi
The Real Dirt: Article

It’s Puncturevine Season Again!

July 13, 2026
Puncturevine (Tribulus terrestris) is an attractive green plant with small yellow flowers commonly seen growing prostrate along the side of the road. A native to Southern Europe, it’s also referred to as “goathead.” However, underneath its foliage lies danger: spiky seedpods with needle-point spikes. If…
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Earwig on walnut leaf.
Pests in the Urban Landscape: Article

Got Earwigs in Your Garden?

July 13, 2026
By Yulie Velez
Earwigs, sometimes also called pincherbugs, can be damaging or just a nuisance around our homes and gardens. While these insect pests aren’t harmful to humans, they can cause quite the ruckus in home gardens. The most common species found in California is the European earwig, Forficula auricularia. This…
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A spiky bush with yellow flowers stands in a dry empty lot under a bright blue sky with wispy clouds with buildings in the background.
Pests in the Urban Landscape: Article

Yellow Starthistle

July 9, 2026
By Belinda Messenger-Sikes
Yellow starthistle is a spiky, fast-growing, invasive weed in home landscapes, parks, rangelands, roadsides, and natural areas. It outcompetes other plants by growing in impenetrable stands and depleting soil moisture. It's also highly flammable which increases the risk of wildfires where it's growing. …
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Flowing river with trees in the distant background
Pests in the Urban Landscape: Article

Tangled Ecosystems: Protecting California from Invasive Water Species

July 8, 2026
By Cherie Shook
A few strands of thin, feathery, green plants growing under the dock didn’t catch anyone’s attention last spring. But those strands spread quickly and within months the lake’s calm waters were tangled in mats of the feathery Eurasian watermilfoil, an aggressive aquatic plant that grows quickly and clogs…
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