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Disease
Rain on Walnut’s Parade
Walnut blight and brown apical necrosis (BAN) are perennial disease problems in some parts of the state, particularly…
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Category: Disease
Disease
Preparing for Diseases in Cool, Wet Years
Diseases in nut crops can be affected by both cooler and warmer weather and intense weather changes can…
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Disease
Treatment Options for Management of Walnut Scale and Frosted Scale
Walnut scale (See Figure 1) is an important economic pest of walnuts in California. High populations of walnut…
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Disease
Bacterial Blast Hit Much of the State
Weather played havoc on the 2023 almond crop. Cold, high rainfall and even snow in parts of the…
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Disease
Contiguous Acres, Less Fallowing Make it Harder to Break the Disease Cycle
The plethora of tree nut acres in California agriculture is increasing disease pressure, both from soilborne pathogens that…
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Disease
Almond Replant Disease, Phytophthora are Issues in Young Orchards
Whole orchard recycling (WOR) has many proven benefits to trees and orchard soils, but it doesn’t appear to…
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Disease
Dealing with Summer Foliar Diseases
Summer foliar diseases cause defoliation of the trees and over time reduction in yield. Defoliation also leaves the…
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Disease
The Persistence of Pistillate Flower Abscission
Pistillate flower abscission (PFA), a production problem largely relegated to walnut varieties that make up only a small…
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Disease
Death by a Thousand Cankers
The walnut twig beetle and the thousand cankers disease it vectors don’t appear to be the devastating pests…
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Disease
Phytophthora Issues on the Rise in Pistachios
As more pistachios are planted on marginal ground researchers are noticing an increase in Phytophthora crown and root…
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