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Plant Diseases

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Plant Diseases
Almond Leaf Scorch
Almond leaf scorch is a bacterial disease that kill otherwise healthy trees -- or, if undetected and untreated, entire orchards -- within just a few years. Learn to recognize the disease and take action early to save your trees and your livelihood.

Publication Number:: 8106
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Alternaria Diseases
Apples, broccoli, tomatoes, citrus, and a wide variety of other food crops are susceptible to Alternaria diseases. Learn how to recognize symptoms and control outbreaks.

Publication Number:: 8040
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Anthracnose: Pest Notes for Home and Landscape
Anthracnose, often called leaf, shoot, or twig blight, is a group of diseases found on many deciduous and evergreen trees and shrubs. Some trees such as sycamore, ash, and evergreen elms can be noticeably blighted.

Publication Number:: 7420
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Apple and Pear Scab: Pest Notes for Home and Landscape
Apple and pear scab, caused by the fungus Venturia inaequalis, is generally considered a serious disease of apples and pears in California, causing loss or severe surface blemishing of fruit.

Publication Number:: 7413
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Bordeaux Mixture: Pest Notes for Home and Landscape
Bordeaux mixture is a fungicide and bactericide that can be used to control some diseases of tree fruits and nuts, vine fruits, and ornamentals. Its ability to weather rain and adhere to plants makes it an excellent choice as a winter fungicide.

Publication Number:: 7481
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Cherry Crinkle-Leaf and Deep Suture Disorders
Crinkle-leaf (bull trees, unproductive cherry, or male trees) and deep suture are are widespread and damaging disorders of sweet cherry fruit. Learn how to identify and control these two disorders.

Publication Number:: 8007
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Damping-Off Diseases
Damping-off diseases affect vegetable crops worldwide. Learn the basic on how these fungal diseases spread and what you can do to stop them.

Publication Number:: 8041
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Damping-Off Diseases in the Garden: Pest Notes for Home and Landscape
Damping-off diseases can attack seeds before they germinate, kill shoots before they emerge, or rot the stems of seedlings at the soil line. Find out how to guard against these insidious diseases that can stop your garden before it even starts.

Publication Number:: 74132
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Fire Blight: Pest Notes for Home and Landscape
Fire blight is a common and frequently destructive bacterial disease of pome fruit trees and other related plants. Pear and quince trees are extremely susceptible. Apple and crabapple are also frequently damaged.

Publication Number:: 7414
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Lawn Diseases: Prevention and Management: Pest Notes for Home and Landscape
Maintaining a healthy lawn is the best way to prevent a disease outbreak in a turfgrass. 75 to 85% of common lawn diseases can be avoided by optimizing practices to avoid stressed grass, which is more susceptible to disease outbreaks.

Publication Number:: 7497
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Master Gardener Lecture: Dr. Robert Raabe (DVD)
Professor Emeritus and UC Plant Pathologist Robert Raabe delivers an extensive presentation on ornamental and garden plant diseases especially for UC Master Garderners. Any serious gardener will benefit from Dr. Raabe's insights!

Publication Number:: 6573D
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Nursery Guide for Diseases Caused by Phytophthora ramorum on Ornamentals. . .
This disease, commonly called sudden oak death, has caused widespread mortality in native oaks in California. Many ornamental plants are susceptible to infection, and the pathogen can be moved long distances through shipments of infected nursery stock.

Publication Number:: 8156
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Oleander Leaf Scorch: Pest Notes for Home and Landscape
Oleander leaf scorch is a disease found mainly in southern California. It is caused by the bacterium Xylella fastidiosa, which is the same species (although a different strain) that causes Pierce's disease of grapevines and almond leaf scorch. Oleanders

Publication Number:: 7480
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Palm Diseases in the Landscape: Pest Notes for Home and Landscape
Several major diseases can attack palm trees in California. Some come on gradually; others (like Sudden Crown Drop) are catastrophic. Learn to plant the right palm in the right place and then use an IPM approach to monitor and prevent potential disease.

Publication Number:: 74148
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Peach Leaf Curl: Pest Notes for Home and Landscape
Leaf curl, also frequently referred to as peach leaf curl, affects the blossoms, fruit, leaves, and shoots of peaches, ornamental flowering peaches, and nectarines, and is one of the most common disease problems for backyard gardeners.

Publication Number:: 7426
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Peach Rust Caused by Tranzschelia discolor in California
Peach rust is a problem in every peach-growing area of California, but causes the greatest damage in the Sacramento Valley. Color photos and descriptions in this publication help you identify the disease and the conditions that encourage its development.

Publication Number:: 8011
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Phytophthora Root and Crown Rot in the Garden: Pest Notes for Home and Landscape
Almost all fruit and nut trees, as well as most onamental trees and shrubs, can develop Phytophthora rot. Learn about simple steps you can take to help prevent this potentially fatal plant disease.

Publication Number:: 74133
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Pitch Canker: Pest Notes for Home and Landscape
Pitch canker is a disease of pine trees that is caused by the fungus Fusarium circinatum. The tips of infected branches wilt as a result of obstructed water flow, causing the needles to turn yellow, and then red.

Publication Number:: 74107
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Powdery Mildew on Fruits and Berries: Pest Notes for Home and Landscape
Powdery mildew is a common disease on many types of plants. It can be serious on woody species such as grapevines, caneberries, and fruit trees where it attacks new growth including buds, shoots, and flowers as well as leaves.

Publication Number:: 7494
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Powdery Mildew on Ornamentals: Pest Notes for Home and Landscape
Powdery mildew can be serious on woody species such as rose, crape myrtle, and sycamore where it attacks new growth including buds, shoots, and flowers as well as leaves.

Publication Number:: 7493
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Powdery Mildew on Vegetables: Pest Notes for Home and Landscape
A wide variety of vegetable crops are affected by powdery mildews, including artichoke, beans, beets, carrot, cucumber, eggplant, lettuce, melons, parsnips, peas, peppers, pumpkins, radicchio, radishes, squash, tomatillo, tomatoes, and turnips.

Publication Number:: 7406
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Roses in the Garden and Landscape: Diseases and Abiotic Disorders
A variety of pathogens may attack roses including powdery mildew, rust, and black spot. In addition, roses may display similar symptoms from abiotic disorders that are the result of chemical toxicities, mineral deficiencies, or environmental problems.

Publication Number:: 7463
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Sooty Mold: Pest Notes for Home and Landscape