Pest Management & Plant Health

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This is the tick buried in the skin of Winters' resident Joe Nazarius. It's black-legged nymph tick, Ixodes pacificus, as identified by Lynn Kimsey, director of the Bohart Museum of Entomology and a UC Davis distinguished professor of entomology. (Photo by Debra LoGuercio DeAngelo)

It Started Out as a Quiet, End-of-the-Year Hike Near Lake Berryessa...

January 2, 2023
By Kathy Keatley Garvey
It was a good day for a hike. So Joe Nazarius of Winters embarked on a Dec. 30th hike in the Knoxville Road area, west of Lake Berryessa, when the unexpected happened. "What is this bug buried in Joe's skin?" That's what his wife, Debra LoGuercio DeAngelo, messaged me. She attached a photo.
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Praying mantis: "I'm hungry! What's to eat?" (Photo by Kathy Keatley Garvey)
Bug Squad: Article

To Catch a Cabbage White...On a Wing and a Prayer

December 28, 2022
By Kathy Keatley Garvey
To catch a cabbage white butterfly... It was early October and a gravid praying mantis, almost ready to deposit her ootheca, was hungry. She crawled behind a cactus in our yard, waiting for prey. It did not take long.
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The five gold rings became five golden bees. Here's one of the golden bees, a Cordovan, a subspecies of the Italian. (Photo by Kathy Keatley Garvey)

Revisiting 'The 13 Bugs of Christmas'

December 23, 2022
By Kathy Keatley Garvey
This Christmas season isn't the same without University of California Cooperative Extension apiculturist emeritis Eric Mussen, who died June 3 of liver cancer at his home in Davis. Mussen (1944-2022) was an institution. He was a global authority of honey bees. He was family to everyone.
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A Western yellowjacket, Vespula pensylvanica, and a honey bee, Apis mellifera) sharing a rose in Davis, Calif. (Photo by Kathy Keatley Garvey)

The Wonderful World of Wasps

December 21, 2022
By Kathy Keatley Garvey
"Wasps are terrible. They come jam-packed full of pain and anger, and they love to sting us out of the blue while we're minding our own business. They eat our food at picnics and frighten our children. They even build nests in our gardens and homes, just to complicate our already-stressful lives.
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Figure 1. Close-up of the finger weeder mechanism.
UC Weed Science (weed control, management, ecology, and minutia): Article

Evaluation of automated and mechanical cultivators to control within-row weeds in conventional processing tomatoes

December 18, 2022
By Gale Perez
Conventional processing tomato weed management in California often includes pre-plant herbicides (trifluralin and/or s-metolachlor), followed by cultivation, and hand hoeing. Rimsulfuron herbicide can also be used in conventional systems and can be applied either pre or post transplanting.
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IPM with Diego graphic.
Pests in the Urban Landscape: Article

IPM with Diego: New UC IPM YouTube Series

December 16, 2022
By Lauren Fordyce
Check out UC IPM's new YouTube series IPM with Diego! These short videos are presented from the viewpoint of Diego, a teenager who is not an expert in pest management. However, he explains basic integrated pest management concepts using simple terms and examples that anyone can do.
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A houseplant with yellow leaves.
Pests in the Urban Landscape: Article

2023 Webinars Announced

December 15, 2022
By Lauren Fordyce
The new year brings new webinars from the UC IPM Urban and Community Program! Mark your calendars and register now for these informative presentations, held every third Thursday from 12:00-1:00pm PST.
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Puckery looking green leaf tinged with red.
The Stanislaus Sprout: Article

Cool, Moist Weather Favors Peach Leaf Curl

December 12, 2022
By Anne E Schellman
Peach leaf curl, a fungus disease of peach and nectarine trees, is very common in home gardens. Cool and rainy weather provide ideal conditions for the spread of the disease. Recognizing the disease is simple, since it occurs only on peaches and nectarines and has very definite symptoms.
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