Pest Notes for Home & Landscape, Gardening & Pests, Lawn & Garden

California Oakworm: Pest Notes for Home and Landscape

The California oakworm is one of many species of caterpillar that feed on oaks in California. Damage is most common on coast live oak in the San Francisco Bay area and Monterey Bay region; but outbreaks can occur in many parts of the state.

Publication Number:: 7422

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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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Poison Oak: Pest Notes for Home and Landscape

Poison oak or western poison oak has a distribution extending from British Columbia south to the Baja California peninsula. Contact with poison oak leaves or stems at any time of the year can cause an allergic response.

Publication Number:: 7431

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Sudden Oak Death: Pest Notes for Home and Landscape

Sudden oak death is a recent epidemic that affects coast live oak, California black oak, Shreve oak, and tanbark oak. Tens of thousands of infected and dead trees have been found in Marin, Mendocino, Monterey, Santa Cruz, and Sonoma counties.

Publication Number:: 74151

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Oak Pit Scales: Pest Notes for Home and Landscape

Several species of pit scales attack many common deciduous and evergreen oaks in California. The valley oak is especially susceptible. Pit scales suck juices from twigs and cause twig dieback, which first becomes apparent in mid- to late summer.

Publication Number:: 7470

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Carpenterworm: Pest Notes for Home and Landscape

Carpenterworm is a common wood-boring insect that can cause significant damage to trees. Trees commonly infested include willow, ash, ornamental pears, black locust, cottonwood, maple, apricot, fruiting pear, birch, oak, and American elms.

Publication Number:: 74105

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Clearwing Moths: Pest Notes for Home and Landscape

The larvae of several species of clearwing moths are important wood-boring pests in landscapes. Hosts include alder, ash, birch, fir, oak, pine, poplar, sycamore, willow, and stone fruit trees such as apricot, cherry, peach, and plum.

Publication Number:: 7477

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Leafrollers on Ornamental and Fruit Trees: Pest Notes for Home and Landscape

Fruittree leafroller, Archips argyrospila, can be a serious pest throughout California. It occurs on a very large number of ornamental trees and is particularly damaging to deciduous and live oaks.

Publication Number:: 7473

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Pest Notes for Home & Landscape

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