Pests & Diseases

UC Master Food Preserver: Page

Kitchen Pest Quick Tip Cards

Kitchen Pest Quick Tip Cards contain valuable information on identifying, managing, and preventing common pests in your kitchen, and also a quick guide on earthquake safety.
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information for home gardener on common insect pests in Sonoma County
UC Master Gardener Program of Sonoma County: Page

Pests, Diseases, and Weeds: Safe and Sustainable Management through IPM

Integrated Pest Management (IPM) involves the use of environmentally sound, effective practices to keep pests, diseases, and weeds from damaging gardens. IPM begins by identifying the pest, disease, or weed, then selecting the most effective methods and materials for controlling the problem.
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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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UC Master Gardener Program of Alameda County: Page

Why are mushrooms popping up in my yard?

Find out why mushrooms are appearing in your garden, their causes, role in soil health, and if they’re harmful or beneficial to you, pets, and your plants.
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UC Master Gardeners of Merced County: Page

Ask Our Helpline

Something in your garden or home bugging you? Do your roses have strange spots? Is something eating your tomatoes? The Merced Master Gardeners are here to help! Contact our Helpline to get answers to your garden challenges and pest problems. Send an email to anrmgmerced@ucanr.edu.
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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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A cluster of leaves on a branch. Some are flat and green and others are bumpy and red.
Pests in the Urban Landscape: Article

When Should You Treat for Peach Leaf Curl?

November 25, 2024
By Lauren Fordyce
While you may not notice symptoms of peach leaf curl until the spring, you should manage it in the fall and winter. Peach leaf curl is a fungal disease that primarily affects peach and nectarine trees.
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Leaves with round holes in them and green fruit with red spots on them.
Pests in the Urban Landscape: Article

Wet Weather Tree Diseases

March 26, 2024
By Belinda Messenger-Sikes
After years of drought, we welcome rain in California. But we also recognize that rain can help spread a number of plant diseases. Rain and wind can splash bacteria and fungi from infected leaves, branches, and blossoms to uninfected parts of the tree.
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