California Walnuts: Starting Spring Irrigation – Too Much Too Soon? Apr 12, 2021

    🕔Apr 12, 2021
    Walnuts are generally regarded as very sensitive to water stress. Severe stress and defoliation can occur when irrigation is reduced in the summer or discontinued entirely for harvest. Since walnuts […]

    California Walnuts: Phytophthora Root and Crown Rot, Paradox Canker Disease Mar 23, 2021

    🕔Mar 23, 2021
    Phytophthora crown and root rots and Paradox canker disease are difficult to detect until the above- ground parts of the tree show symptoms, which usually appear at later stage of […]

    California: Nut Industry Underwrites 4 UC Researchers Jun 8, 2020

    🕔Jun 8, 2020
    Four staff research associates will join the ranks of UC Cooperative Extension scientists in the coming months to support nut crop advisors conducting critical research in walnut, almond and pistachio […]

    California Pistachios, Walnuts: Leaf-Out Problems – What’s Going On? May 8, 2020

    🕔May 8, 2020
    Since mid-April, many advisors up and down the Valley have been receiving calls about unusual leaf-out in pistachio and walnut. The Sacramento Valley has certainly been experiencing this. In pistachios, […]

    California Tree Crops: Postharvest Irrigation in a Dry Autumn? Nov 25, 2019

    🕔Nov 25, 2019
    Almond, prune, and walnut harvests are behind us, what postharvest irrigation(s) have you put on your orchard? Rainfall has been absent in October and November (as of this writing). Despite […]

    California Tree Crops: Suterra Announces New NOW Control Product Nov 4, 2019

    🕔Nov 4, 2019
    Suterra today announced the launch of CheckMate Puffer NOW Ace, a new aerosol pheromone formulation for season-long Navel Orangeworm (NOW) control in almonds, pistachios, walnuts, figs and other crops where […]

    California Walnuts: Yellow Howard Problem Returns Oct 9, 2019

    🕔Oct 9, 2019
    The yellowing Howard problem is one specific instance of waterlogging induced root death. The yellow Howard problem was observed by Janine Hasey (UCCE Emeritus Sutter-Yuba and Colusa) during cool, wet springs […]

    Tree Nuts: Almond, Walnut, and Hazelnut Production Forecast To Drop – USDA Oct 1, 2019

    🕔Oct 1, 2019
    As the 2019/20 domestic season is already underway for most tree nuts, anticipated smaller almond, walnut, and hazelnut crops signal reduced U.S. tree nut supplies. In the previous season (2018/19), […]

    California Walnuts: Yellowing, Collapsing Trees? Might Be Water Logging. Oct 1, 2019

    🕔Oct 1, 2019
    A single yellowing walnut tree in an otherwise healthy orchard has been a frequent sighting when driving along the roadways of the Sacramento Valley this summer. These yellowing trees have […]

    California Walnuts: Howard Nut Drop – What Happened? Jul 18, 2019

    🕔Jul 18, 2019
    During about the second or third week in June, many Howard walnut trees experienced nut drop of perhaps as many as 100 nuts per tree, with many trees losing no […]


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