Pest Management

Adult scales are immobile with coverings that are one twenty-fifth to one-quarter inch long. Immature scales are small slow-moving bodies called crawlers that have legs which eventually drop off. There are two main groups of scale insects — soft and armored. Soft scales have a more rounded and convex…

Both snails and slugs are members of the mollusk phylum and are similar in structure and biology, except that slugs lack the snail's external spiral shell. These mollusks move by gliding along on a muscular “foot.” This muscle constantly secretes mucus, which facilitates their movement and later dries to…

 Thrips are tiny, slender insects with hairs on their wing margins. They are less than one-twentieth inch long and their color varies depending on the species and life stage.Thrips hatch from eggs and develop through two feeding and two non-feeding stages before developing into adults.Most pest…

Often the largest caterpillars seen in vegetable gardens – up to four inches long. Horn or thorn at rear end. Adult moths have wingspan up to five inches.CategoryInsectSigns/SymptomsHornworms feed on blossoms, leaves, and fruit. At high populations they can extensively defoliate plants and scar the fruit…

Piercing, needle-like mouth parts suck sap from food-conducting tissues in plant stems and leaves. Like aphids, whiteflies excrete sugary liquid called honeydew, so leaves may be sticky or covered with black sooty mold. The honeydew attracts ants, which interferes with the activities of natural enemies that…

Yellowjackets are one-half to one inch long with jagged bright yellow and black stripes. Their narrow “waists” are barely visible. Unlike other common wasps, yellowjackets scavenge on food. They nest in holes in the ground, inside wall cavities, or in hanging nests totally enclosed in gray paper with a…

Two most common are mule deer and black-tailed deer. Both eat shrubs, vines, fruit and nut trees, garden vegetables, grasses, and small flowering plants. Deer dislike some plants, especially when other more palatable plants are available.Signs/SymptomsHoof prints two to three inches long, split in the middle…

 Small burrowing rodents that feed on roots of plants. A single gopher can inflict considerable damage in a short time. They live up to three years and eat a wide variety of vegetation, usually what they encounter while digging. Sometimes feed above ground, venturing only a body length or so from their…

Smart, dexterous, and can become very aggressive when cornered. When searching for den or food, they can be extremely destructive to homes and gardens. Communicate using a variety of sounds including purring, growling, hissing, and whistling. Eat plants and animals, including berries, nuts, acorns, pet food,…

Rats are among the most common pests in Marin homes and gardens. Norway rats (Rattus norvegicus) also known as brown, sewer, or wharf rats, are mostly nocturnal. They constantly explore and learn about their environment, memorizing pathways, obstacles, and locations of food and water. Roof rats (Rattus…