Tree & Shrub Care

UC Master Gardener Program of Alameda County: Page

Citrus Leafminer

Understanding citrus leafminer: Learn why this common pest causes cosmetic damage but doesn't harm your citrus trees.

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A tree with yellow fall foliage in front of a house.

UC Master Gardeners of Inyo and Mono Counties: Page

Tree Care Tips

Information on pruning, problems, and tree myths.

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UC Master Gardeners of Merced County: Page

The application process for the UC Master Gardeners of Merced County's 2026 Training Class is now open. Any Merced County adult resident with an interest in horticulture (plants, lawns, trees, vegetables and more) and public service are encouraged to apply for the Master Gardener Program.

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UC Master Gardeners of Merced County: Page

Request a Speaker

Are you looking for a Speaker for your next community group meeting? The Master Gardeners of Merced County Speakers Bureau is a collection of expert speakers who offer workshops and talks about a variety of topics to Merced County service organizations, garden clubs or government entities.

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oak root fungus mushrooms on roots of neighborhood street trees

Over the Fence (Alameda County): Article

Landscape Trees: Managing Oak Root Fungus (Armillaria)

February 19, 2025

By Judy Quan

Learn about one of the major diseases associated with poor water management, oak root fungus (Armillaria root rot), and what you can do about it.

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A dark haired woman holds a pesticide bottle in her hand to read it.

Pests in the Urban Landscape: Article

Tree & Shrub Insecticides Limited in New Law

February 11, 2025

By Lauren Fordyce

As of January 1, 2025, popular lawn and garden pesticides belonging to the neonicotinoid class, can no longer be used by home gardeners on outdoor fruit trees, lawns, or ornamental plants in California.

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A brown, dying shrub in front of a row of healthy green shrubs.

Pests in the Urban Landscape: Article

Wilted plants: lack of water or disease?

February 4, 2025

By Belinda Messenger-Sikes

A well-watered plant that suddenly wilts or unexpectedly drops its leaves could be infected with the soil pathogen Phytophthora. The disease it causes, Phytophthora root and crown rot, can affect many plants, including ornamental trees and shrubs, fruit trees, and vegetables.

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