Pacific Nut Producer Magazine

Tag: Almonds

  • September Orchard Tasks – Almonds

    Although almond harvest may be wrapping up, the work needed to prepare orchards for next season has already begun. Post-harvest priorities include monitoring for disease, irrigating trees, pruning and managing pests.

    Brent Holtz with the University of California Cooperative Extension advises growers to watch for red leaf blotch and rust. Bright orange spots on leaves may indicate red leaf blotch, while orange and black spores can be signs of rust. This year’s warm March appears to have increased the severity of rust, making it important to avoid irrigation practices that keep orchards humid for extended periods.

    However, growers should not stop irrigating altogether. Water should be applied as soon as the harvested nuts are removed from the orchard floor. Dr. David Goldhamer, emeritus irrigation specialist with UC Davis, says almond trees can use up to 11 acre-inches of water after harvest if their leaves remain active. Proper post-harvest irrigation can also help move salt below the trees’ root zone.

    Growers can also begin pruning mature orchards immediately after harvest instead of waiting until dormancy. Pruning early gives wounds time to heal before rainfall, reducing the risk of fungal diseases. While studies indicate pruning does not significantly improve almond yields, it remains necessary to provide enough space for orchard equipment to pass between trees.

    Fall is also a good time to manage gophers, ground squirrels and mice. Baiting or fumigation can help control ground squirrels before they enter hibernation. Growers should also look for pieces of almond shells left in tree crotches, which may indicate mouse activity.

    For more information about post-harvest almond orchard management, read the full article in the September issue of Pacific Nut Producer Magazine.

  • August Orchard Tasks With Hyrum – Almonds

    If you are an Almond Grower, be sure to follow our socials to stay updated on monthly tasks in your orchard. Share this with every almond grower you know. Read the full Orchard Tasks by Mohammad Yaghmour in the August issue of Pacific Nut Producer Magazine.

  • Leading Entomologist and PCA: How to Control Navel Orangeworm and Aflatoxin

    How can almond, pistachio, and walnut growers control navel orangeworm and reduce aflatoxin risk? UC Cooperative Extension entomologist Houston Wilson joins pistachio and almond grower and pest control adviser (PCA) Joe Coelho and Arielle O’Connor of the Arizona Cotton Research & Protection Council to discuss practical strategies for preventing infestations, limiting crop damage, and reducing the effects of aflatoxin.

    Presented by title sponsor Liphatech and premier sponsor the Arizona Cotton Research & Protection Council.

    Learn more about postharvest fumigation at https://liphatech.com/

  • Almond Alliance Gives Growers a Seat at the Table

    The California almond industry is resilient, but input cost, labor and water access remain constant worries for growers. The Almond Alliance is working at the state and federal level to give a voice to the growers of over 80% of the world’s almond supply. Matthew Malcolm with California Ag Network took the time to talk with Alliance Chair Blake Vann to learn about what’s going on in their organization. Watch this quick video and learn more in Pacific Nut Producer Magazine.

  • Almond Hulls Receive GRAS Status from FDA

    Almond hulls were recently given Generally Recognized as Safe (GRAS) status by the FDA. This designation opens the door for them to be used in a variety of different food products, as they are high in fiber and phytonutrients. Almond Board of California CEO and President Clarice Turner spoke with Matthew Malcolm at California Ag Network to discuss this recent breakthrough and what it means for the almond industry. Watch this quick video and learn more in Pacific Nut Producer Magazine.

  • Shifting Economic Factors Impact Almond Growers

    The changing economic landscape is affecting growers across the board, and almonds are no exception. Factors like inflation are having an impact on orchards and are pushing back growers’ break-even years after planting. Matthew Malcolm with California Ag Network spoke recently with Matt Woolf of Terrain Ag to discuss the changing economics of almond growing. Watch this quick video and read more in Pacific Nut Producer Magazine.

  • Almond Market Reaching Stability

    Bearing acreage for California almonds has declined for the first time since 1995 and total acreage has been declining for over four years as the business reaches equilibrium. However, growers in California will continue to contribute about 80% of the global supply as production in other countries remains flat. Matthew Malcolm with California Ag Network talked to the Almond Board of California President and CEO Clarice Turner about these recent developments in the almond industry. Watch this quick video and learn more in Pacific Nut Producer Magazine.

  • High Heat Could Lead to Early Almond Harvest

    High early heat could result in a smaller nut set for almonds, though some larger hulls are being found. Meanwhile, orchards enjoyed a good bloom and growers may expect to harvest as early as July. Bountiful.ag Founder and CEO Megan Nunes spoke with Matthew Malcolm from California Ag Network about these findings in their first almond crop forecast of the 2026 season. Watch this video and learn more in Pacific Nut Producer Magazine.

  • How to Protect Your Almonds from Navel Orangeworm and Other Pests

    With spring weather arriving earlier, almond growers in California can expect an earlier influx of pests in their orchards — and to get started sooner on preventing them from harming their nut crops. According to UCCE Sacramento Valley Integrated Pest Management Supervisor Sudan Gyawaly, now is the time to watch out for things like navel orangeworm (NOW), peach twig borers, leaf-footed bugs and spider mites.

    Navel Orangeworm (NOW)

    Navel orangeworms (Amyelois transitella) are the most prominent pests in almond orchards. These moths lay their eggs on the shells after hull split, and the larvae burrow inside the shell, eating the nuts and sheltering inside. Signs of a NOW infestation in an orchard include:

    ·      Small, flat, oval-shaped eggs outside of almond hulls

    ·      Pinhole-sized holes in almond hulls

    ·      Hulls that are oily in appearance

    ·      Fungal infections of nuts

    ·      Extensive webbing inside the hulls

    ·      Partially eaten nuts

    ·      Larvae that are white to pink in color, with crescent marks behind the head

    Navel orangeworm damage to an almond. Photo by Matthew Malcolm

    To manage NOW in your orchards, be sure to continuously monitor male flight activity by using pheromone traps. Also continue to monitor NOW egg traps to establish a spring biofix (the first spring flight, which acts as the starting date for calculating growing degree days), to help you predict the timing of their later flights. The first flight usually occurs from late March through April, but earlier times are possible, depending on the weather.

    According to UC IPM, prevention is key to avoiding infestation. This includes removing all mummy nuts by the start of February. To eliminate existing NOW populations:

    ·      Establish a biofix

    ·      Hang pheromone dispensers in the trees to disrupt mating

    ·      Assess trap activity and begin spraying at hull split.  Apply pesticides at night and early morning for optimal results

    ·      Harvest and clean up as early as possible

    ·      Remove mummy nuts by March 15 of the next year.  Mow or disk mummies on the ground.

    Peach Twig Borer

    While less of a concern in mature orchards, peach twig borer — also a moth — can still be a menace for almond growers in younger fields by causing primary scaffold damage. Begin monitoring pheromone traps in April to establish a biofix and decide if a spray is necessary in May.  Consult with your pest control adviser if you are unsure.

    Leaf-Footed Bugs

    Stink bugs and leaf-footed bugs are especially troublesome after a warm winter. Leaf-footed bugs can be trickier to spot.  UC IPM lists the tell-tale signs of an infestation in your orchard as:

    ·      Gummy nuts — nuts with exudates on the outside of the hull — a signature warning

    ·      Nuts that have dropped prematurely

    ·      Black spots on kernels and wrinkled, misshapen nutmeat from adult feeding

    ·      Withered and aborted shells from bugs feeding on premature nuts

    Leaf-footed bug

    Stink bugs cause similar damage, but this is usually around May or June. Leaf-footed bug management can vary from orchard to orchard, depending on history and severity. Gyawaly advises basing spray decisions on this history plus on damage risk associated with seasonal conditions. Consult with your pest control adviser if you are unsure.

    Spider Mites

    Typically found in the lower parts of the canopy, spider mites may also come out earlier and in greater numbers with warmer weather. Their presence should be monitored once every two weeks.  For this pest, beneficial arthropods that prey on spider mites may be one of your orchard’s best friends. These species include:

    ·      Western predatory mites

    ·      Spider mite destroyers

    ·      Sixspotted thrips

    ·      Pirate bugs

    By monitoring and addressing mite and insect pests in the spring, the pest populations can be kept under control to ensure a large, high-quality almond harvest.

    Watch this interview on Navel Orangeworm: Video Interview

  • Almond Industry Requests EPA Follow Sound Science in Essential Product Registration

    The almond industry is has just received Section 18 emergency approval for the use of an essential bactericide for the sixth year. A product that has been fully registered in other commodities, Kasumin should be permanently registered for use in almonds, but the EPA is ignoring the sound science showing that it’s safe and beneficial for almonds under critical weather conditions. Watch this brief interview as Jim Adaskaveg from UC Riverside explains with Matthew Malcolm on California Ag Network and read more in Pacific Nut Producer Magazine.