Archive Nut, Prune and Olive Programs

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May 2025Archived

 

Field picture submitted by Elizabeth Fichtner

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Kearney Agricultural Research and Extension Center: Page

Physiological disorders

Fruit freezing injury Skin discoloration, inking, staining, black staining Internal browning, chilling injury, dry fruit, mealiness, woolliness Occurrence Freezing injury can be encountered in fruit that are purposely stored at near their freezing point or some accidental exposure to subfreezing tem...
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Kearney Agricultural Research and Extension Center: Page

Ripening protocols

Optimum procedures for ripening kiwifruit Optimum procedures for ripening stone fruit Preconditioning guidelines for kiwifruit shippers Key to delicious tree fruit is keeping it out of the killing zone...
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Kearney Agricultural Research and Extension Center: Page

UC Plant Protection Quarterly archive

Plant Protection Quarterly was published by the Plant Protection Group and UC Integrated Pest Management Program at the Kearney Agricultural Research and Extension Center from 1991 to 2008.
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Kearney Agricultural Research and Extension Center: Page

Tree Fruit Integrated Pest Management

Walt Bentley To provide biological and monitoring information on the major pests of stone fruit and population dynamics for some beneficials, recent research publications, and links to other University of California sites.
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Kearney Agricultural Research and Extension Center: Page

Peach twig borer

Adult peach twig borer Small larvae of peach twig borer (Anarsia lineatella) are almost white with a distinct black head. As larvae mature they become chocolate brown with alternating dark and light bands around the abdomen.
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Kearney Agricultural Research and Extension Center: Page

PTB monitoring information

Monitoring Peach Twig Borer Development with Degree-Days by Richard E. Rice, Frank G. Zalom, & Jay F. Brunner The development of the peach twig borer Anarsia lineattela Zeller (PTB) can be monitored using pheromone traps and local temperature.
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Kearney Agricultural Research and Extension Center: Page

Omnivorous leafroller

Omnivorous leafroller Omnivorous leafroller (Platynota stultana) is primarily a pest of peaches in the San Joaquin Valley. It occurs in the Sacramento Valley, but seldom causes damage. Omnivorous leafroller overwinters as immature larvae in mummy fruit and does not enter dormancy.
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Kearney Agricultural Research and Extension Center: Page

Oriental fruit moth

Oriental fruit moth Adult oriental fruit moths (Grapholita molesta) are small grayish moths about 0.4 inch long. These moths normally fly in the evenings just after sunset, or occasionally between daybreak and sunrise. Eggs are disk shaped, white to creamy in color when first laid, and about 0.
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Kearney Agricultural Research and Extension Center: Page

San Jose scale

San Jose scale Female San Jose scale (Quadraspidiotus perniciosus) give birth to living young that emerge from under the edge of the scale covering. These tiny yellow crawlers wander in a random fashion until they find a suitable place to settle.
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Kearney Agricultural Research and Extension Center: Page

Western flower thrips

Western flower thrip Western flower thrips (Frankliniella occidentalis) are minute insects, about 0.03 inch long, with two pairs of fringed wings. The adult has three color forms that vary in abundance depending on the time of year.
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