Pests & Diseases

Tomato Pests and Diseases
UC Master Gardeners of Orange County: Event

Tomato Pests and Diseases-Laguna Beach

Jun 21, 2025

The best thing about growing tomatoes – their wonderful flavor. The worst? Pests, diseases and environmental threats.  In this presentation, UC Master Gardeners of Orange County will examine those and provide general control methods, including crop rotation, planting/watering, choosing disease resistant…
UC Master Gardeners of Orange County
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Valley oak tree atop a hill of brown grass.
Urban & Community IPM Webinars: Event

Webinar: Mediterranean Oak Borer & Other Pests of California Oaks

Apr 10, 2025

The Mediterranean Oak Borer (MOB) is an invasive ambrosia beetle that infests several species of white oaks in California: valley oak, blue oak, and Oregon oak. The beetle is spreading rapidly in Napa, Lake, Sonoma, and Sacramento Counties and has been detected in neighboring El Dorado, Yolo, and Mendocino…
Urban & Community IPM Webinars
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Small pink and white waxy insects feeding on young citrus fruit.
UC Ag Experts Talk Webinar Series: Event

UC Ag Experts Talk: Mealybug Management in Citrus Orchards in California

May 21, 2025

In this webinar, Dr. Sandipa Gautam, Cooperative Extension Area Citrus IPM Advisor with the University of California Agriculture and Natural Resources at the Lindcove Research and Extension Center, will discuss citrus mealybug and how it has become a pest of concern for citrus growers in California in recent…
UC Ag Experts Talk Webinar Series
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Short mushrooms growing at the edge of a lawn along mowing strip. Caps of mushrooms are whitish to light brown and appear cracked. Caps are flat with edges rolled down slightly.

Rains Bring Lawn Mushrooms

January 9, 2026
By Belinda Messenger-Sikes
Winter rains and damp conditions in many parts of California may have brought a surprise visitor to your lawn: mushrooms! A few mushrooms sprouting in your lawn can be a good sign: it means there's plenty of organic matter in the soil. But if patches of mushrooms are sprinkled across your lawn, something…
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Colony of bright yellow, pear-shaped aphids with black legs, antennae, and cornicles (tail pipes) on their abdomens surrounded by exoskeletons on a green leaf.

Top Ten Pests of 2025

January 8, 2026
By Yulie Velez, Karey Windbiel-Rojas
Forget Spotify Wrapped – can you guess which pests received the most hits on UC IPM’s Pests Notes page this year? Here are the top ten pests that made your year: (1) Carpet Beetles  For several years, carpet beetles have been in the top 5 on our playlist. Immature carpet beetles feed on…
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A close-up of shiny gold and green holiday ornaments and multicolored lights hanging on a fir tree with bushy, dark-green leaves (needles).

Happy Holidays from UC IPM

December 22, 2025
From the UC IPM Urban and Community team, we’d like to wish you a happy holiday season! As we reflect on this past year, we’d like to express our gratitude to all of you for joining us to learn about pest management around the home and garden.  This year, we’ve connected with you in various ways:…
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An orange flower grows in a greenhouse
Green Blog: Article

California nursery industry grapples with plastics, water, nutrients

October 8, 2025
By Caroline D Champlin
Nursery owners and landscapers are anticipating a slew of new environmental regulations to impact business as usual. Scientists from University of California Agriculture and Natural Resources brought these hot topics, and many others, to business owners’ attention at the 2025 California Nursery Conference…
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