Insect and Mite Pests, Pests, Diseases, Integrated Pest Management

Clothes Moths: Pest Notes for Home and Landscape

The webbing clothes moth and the casemaking clothes moth are occasional fabric pests in California. They tend to hide when disturbed, and for this reason, infestations are not usually noticed until the damaged articles are found.

Publication Number:: 7435

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Cockroaches: Pest Notes for Home and Landscape

Cockroaches may become pests in our homes and landscape.

Las cucarachas pueden ser plagas en nuestros hogares y paisajes.

Publication Number:: 7467

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Codling Moth: Pest Notes for Home and Landscape

Codling moth, Cydia (Laspeyresia) pomonella, is a serious insect pest of apples, pears, and English walnuts.

Publication Number:: 7412

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Comparing Fruit Rind Scarring That Three Early-Season Pests Cause in Mandarin

This publication helps you compare specific types of scars caused by insects inmandarins and sweet orange so you can prevent costly rind damage and the possible downgrading of your fruit.

Publication Number:: 8708

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Conenose Bugs: Pest Notes for Home and Landscape

Conenose bugs are members of the family Reduviidae, commonly called assassin bugs. Most members of this family are predators of other insects, but the conenose, also called kissing bugs, are bloodsucking parasites of a wide variety of animals and humans.

Publication Number:: 7455

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Cottony Cushion Scale: Pest Notes for Home and Landscape

Cottony cushion scale can infest many woody ornamentals and certain crops. Common hosts in California are citrus, cocculus, nandina, and pittosporum. Its cottony egg sac and profuse honeydew production make cottony cushion scale easy to spot.

Publication Number:: 7410

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Diaprepes Root Weevil

Diaprepes root weevil is a serious pest of Florida citrus, sweet potatoes, papayas, and ornamental plants, and it threatens to become established in California as well.

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Publication Number:: 8131

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Drywood Termites: Pest Notes for Home and Landscape

The western drywood termite is most prevalent in southern California and the Central Valley but also can be found along the coast, in bay areas south of San Francisco, and in the southern California desert.

Publication Number:: 7440

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Earwigs: Pest Notes for Home and Landscape

Earwigs can seriously damage seedling vegetables, annual flowers, maturing soft fruit, and corn silks. However, they also have a beneficial role in the landscape and have been shown to be important predators of aphids.

Publication Number:: 74102

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Elm Leaf Beetle: Pest Notes for Home and Landscape

Elm leaf beetle, Xanthogaleruca (=Pyrrhalta) luteola, is one of the most important insects damaging urban forests in the United States and is the major pest of elm trees in California.

Publication Number:: 7403

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Eucalyptus Longhorned Borers: Pest Notes for Home and Landscape

Two closely related species of longhorned borers (family Cerambycidae) attack eucalyptus in California. They are attracted to freshly cut wood, dying limbs, and trees suffering from stress, especially drought stress.

Publication Number:: 7425

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Eucalyptus Redgum Lerp Psyllid: Pest Notes for Home and Landscape

Psyllids are plant-juice sucking homopterans in the insect family Aphalaridae. Redgum lerp psyllid nymphs (immatures) form a cover called a "lerp," which is a small white, hemispherical cap composed of solidified honeydew and wax.

Publication Number:: 7460

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Eucalyptus Tortoise Beetle: Pest Notes for Home and Landscape

The eucalyptus tortoise beetle is found throughout southern California, the Central Valley, and the San Francisco Bay Area. Adults and larvae chew semicircular or irregular notches along edges of eucalyptus leaves and can remove most of a leaf’s surface.

Publication Number:: 74104

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Eye Gnats: Pest Notes for Home and Landscape

More an annoyance than anything else, eye gnats feed where they can find moisture on humans and animals: generally at eyes, mouth, nostrils, and open wounds. Learn an integrated approach to controlling these tiny pests.

Publication Number:: 74164

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Ferrisia gilli: A New Mealybug Pest of Pistachios and Other Deciduous Crops

Ferrisia gill is a mealybug species in California that affects pistachio plantings in 11 counties. Find out how to monitor and control the pest's spread using biological and chemical means.

Publication Number:: 8207

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Fleas: Pest Notes for Home and Landscape

Fleas are frequently encountered in homes and are common pests on domestic cats and dogs.

Las pulgas son encontradas con frecuencia en hogares y son pestes comunes en gatos y perros domésticos.

Publication Number:: 7419

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Flies: Pest Notes for Home and Landscape

Of the thousands of species of flies, only a few are common pests in and around the home. These pests breed in animal wastes and decaying organic material from which they can pick up bacteria and viruses that may cause human diseases.

Publication Number:: 7457

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Flower Flies (Syrphidae) and Other Biological Control Agents for Aphids . . .

Flower flies (sometimes known as syrphids or hoverflies) are effective predators against aphids in California vegetable fields. Learn to recognize these aphid eaters and encourage them to help with your pest management.

Publication Number:: 8285

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Fungus Gnats: Pest Notes for Home and Landscape

Fungus gnats occur around damp, decaying vegetation, algae, and fungi. These flies can appear in large numbers in or around buildings and also can be a problem in greenhouses, nurseries, and interior plantscapes.

Publication Number:: 7448

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Giant Whitefly: Pest Notes for Home and Landscape

Since its introduction into southern California in 1992, the giant whitefly has spread rapidly northward along the coast and into interior valleys. It can severely infest many ornamental plant species found in nurseries, landscapes, and home gardens.

Publication Number:: 7400

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Glassy-Winged Sharpshooter: Pest Notes for Home and Landscape

The glassy-winged sharpshooter can spread the disease-causing bacterium Xylella fastidiosa which is the causal agent of devastating plant diseases such as Pierce’s disease, oleander leaf scorch, and almond leaf scorch.

Publication Number:: 7492

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Goldspotted Oak Borer: Pest Notes for Home and Landscape

Goldspotted oak borer attacks xylem and phloem layers near the base of oak trees and can girdle and kill mature oaks. A San Diego area pest, it may eventually spread to other areas of California. Learn identification and treatment methods.

Publication Number:: 74163

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Grasshoppers: Pest Notes for Home and Landscape

Grasshoppers are sporadic pests in gardens. However, in some years large populations may build up in foothills and rangelands, especially after a wet spring and then migrate into nearby gardens, often defoliating everything in sight.

Publication Number:: 74103

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Hackberry Woolly Aphid: Pest Notes for Home and Landscape

Hackberry woolly aphid, sometimes called Asian woolly hackberry aphid (Shivaphis celti), infests hackberry, especially Chinese hackberry (Celtis sinensis), throughout the state.

Publication Number:: 74111

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