Pacific Nut Producer Magazine

Tag: Navel Orangeworm

  • Almond Market Looks Strong Going Into 2027

    The almond industry is entering the new crop year from a solid position according to a recent market update from Blue Diamond Growers. This is thanks in no small part to exports to India.

    The 470.7-million-pound carry-in (of which only 447.1 million pounds is estimated as edible) is down from prior year and confirms the tightness in supply from one crop to the next. Downward pressure on crop potential and overall supply and demand fundamentals continue to support a stable-to-firm market outlook. Export demand remains healthy with the coming weeks expected to provide clarity on crop size, kernel sizing, and the degree to which rapidly appreciated pricing can be absorbed by end markets.

    The 2026 crop year started on a positive note, meeting strong industry expectations. August shipments totaled 190 million pounds. Exports reached 143.2 million pounds, an increase of 31%, while the domestic market shipped 46.8 million pounds at a modest -3.3% decrease versus last year. With six of the last seven last months’ total shipments outpacing previous year, the industry continues to experience strength in global demand.

    India was the clear standout in August, receiving 44.3 million pounds, up approximately 170% from 16.4 million pounds last year. The increase reflects stronger replenishment ahead of the festival season and a normalization from the unusually low August 2025 shipment level. The magnitude of the increase is notable given elevated pricing and confirms India’s continued importance as the primary outlet for California inshell almonds. Local consumption will become increasingly important ahead of festival season as buyers will begin to replenish stocks that dwindled at the end of the 2025 crop year.

    August domestic shipments totaled 46.8 million pounds, down 3.3% year over year. While this may not have been the start to the year the industry had hoped for, the improvement in shipment performance over the last six months provides optimism that the market has stabilized. As prices rose over the last month, purchasing activity slowed and shifted to closer, strategic locations. This cautious approach is expected to continue. Looking ahead, domestic demand is expected to remain steady, with a pipeline of commitments providing support for shipments in the next few months.

    The 2026 crop is progressing rapidly with current receipts for August coming in at 401.9 million pounds. The pacing of receipts is 55% above August 2025 due to harvest beginning approximately 2 weeks earlier than prior year. The increase in receipts over last year is not a reflection of projected crop receipts for 2026.
    Nonpareil and Independence varieties are largely harvested with pollinizer varieties following closely behind. In some of the most advanced areas, growers have completed orchard harvest activities and are focusing on post-harvest practices and minimizing water stress to support next season’s crop.

    Current Nonpareil reject levels are the lowest in several years, though ticking up slightly, driven by a third flight of navel orangeworm. Independence rejects are trending higher than last year, mainly due to brown spot from leaf-footed plant bugs.

    Yields are variable in Nonpareil and Independence depending on the region. Speculation on smaller kernel sizes coming into harvest are beginning to be realized. Yields in Nonpareil and Independence receipts are signaling a lower 2026 crop than 2025, as forecasted. There is continued downward pressure on crop potential, which will be informed by pollinizer varieties that hullers are beginning to process. Next month’s report may reflect further shifts to the forecast as pollinizer volume comes in and is accounted for. — Story contributed by Blue Diamond Growers

  • New Investment Aims to Give Growers Another Tool for NOW

    California almond growers know the challenge navel orangeworm brings every season. The pest can reduce crop quality, increase production costs and raise concerns around aflatoxin and marketability. Now, new additional funding is helping continue an industry-backed research effort to advance another tool growers may one day be able to use as part of an integrated pest management program.

    The Foundation for Food & Agriculture Research, the Almond Board of California and Flyttr™ partnered on a nearly $5 million grant to advance development of a biological approach targeting navel orangeworm in almonds and pistachios. ABC is helping fund a portion of the project, reflecting the almond industry’s continued investment in research that supports long-term orchard productivity, crop quality and grower profitability.

    The project centers on Flyttr’s Friendly™ navel orangeworm technology. The concept is simple: release Friendly™ male moths into areas with pest pressure. When those males mate with wild females, no surviving offspring are produced. With continued releases over time, the goal is to reduce the pest population and lower damage pressure in orchards.

    For growers, the significance is not that this replaces today’s best practices. Sanitation, monitoring, mating disruption, timely harvest and well-timed treatments remain important parts of navel orangeworm management. Instead, this research is focused on developing a targeted biological tool that could complement existing programs and help reduce reliance on conventional insecticides over time.

    Navel orangeworm remains one of the costliest pests facing California tree nuts, with industry losses estimated at more than $800 million each year. Damage can affect yield, quality and food safety, which is why the pest continues to be a priority for research, industry collaboration and new technology development.

    Funding from FFAR and industry partners will support the continued work needed to move the technology closer to practical use, including large-scale production systems and field studies. That means the effort is still in development, but it represents an important step toward expanding the number of durable tools available to growers managing navel orangeworm pressure.

    ABC’s role in helping fund this work is part of a broader commitment to support practical, science-based solutions for almond growers. By investing alongside partners, the almond industry is helping advance research that could protect crop value, strengthen pest management options and support the long-term competitiveness of California almonds.

  • Blue Diamond Releases Crop Progress Report

    Blue Diamond Growers release its monthly crop progress report, noting that harvesting conditions began earlier this year due to the impact of the weather.

    Warm summer temperatures dominated the conditions in California’s Central Valley during much of July, with a significant heat wave developing during the final week of the period. Daily maximum temperatures ranged predominately between the mid- and upper 90’s to just over 100 degrees with highest temperatures reported in the southern San Joaquin Valley. Morning lows exhibited greater variability, with readings ranging from the low 50’s to lower 70’s, depending on the degree of cloud cover each morning. Temperatures were amplified by monsoonal moisture traveling northward, bringing occasionally cloudy skies and increased humidity. Increasing daytime temperatures materialized in the final days of the period, marking the start of a significant heat wave. Temperatures were reported to be between 102 to 105 degrees, with higher temperatures forecast for the first week of August.

    The annual return of summertime monsoon flows stirred a bit of apprehension among California’s almond growers, as memories of the challenging 2025 harvest season were rekindled. With that in mind, growers and huller/sheller operators alike worked to complete final pre-harvest tasks during July, focusing on crop maturity that is running well ahead of normal.

    Insect and vegetation management were prime considerations during the period. As noted in our previous report, treatments to protect early harvesting varieties from damage by navel orangeworm were initiated in June, causing the early or advanced crop and pest development. As the crop continues to develop, secondary treatments, intended to catch the insect’s next generation and protect mid and later maturing varieties, were completed in July. As a reflection of the year’s advanced crop development, second treatments have been conducted in roughly the same time frame that initial applications would have been in “normal” years.

    As for other pest issues, observers are reporting increased population of web-spinning mites in the Sacramento and southern San Joaquin Valleys. Control at this stage of crop development presents several challenges and the forecast heat wave promises to expand existing infestations. Treatments targeting almond-damaging ant species have also been performed, including second applications in cases with particularly high populations.

    Observers are reporting widespread instances of red blotch infections in orchards throughout the Central Valley. As may be seen in the photo accompanying this report, if untreated, red blotch can cause severe foliar damage. However, symptoms of this new fungal disease do not appear until 30 to 40 days after infection. Easily spread by airborne spores that are activated by rain events, and potentially by irrigation, this disease spread from a single orchard in Merced County in 2024 to most of the Central Valley by 2025. Orchards that did not receive adequate protection, or any treatments at all are presenting significant symptoms, with the worst infections beginning to defoliate the trees. This is especially problematic in orchards that have been abandoned. Leaf rust, which follows a similar symptomology, has also been observed.

    After delaying or deferring mower passes during the growing season to control costs, vegetation management on the orchard floor became particularly important during the period. Growers must provide for a clean, firm soil surface within the orchard middles (the area between the tree rows), to facilitate an efficient harvest. Where warranted, treatments to control weed regrowth, followed by flail mowers running close to the soil surface, provide the best conditions for a clean harvest.

    Crop maturity also made irrigation management a focal point. Machinery passing through the orchards must be timed between irrigations to prevent rutting of the surface. For those working to employ regulated deficit irrigation (RDI) described in our previous report, the hotter temperatures complicate grower decisions. Under RDI, growers reduce irrigation to one-half of the orchard’s consumptive use for a two-week period at the initiation of hull split. Keeping in mind that water consumption increases as temperatures rise, in extreme cases, normal irrigation scheduling can result in one-half of consumptive use. For those with orchards ready for harvest, water must also be withheld to prevent bark damage during shaking.

    Owing to the advanced crop maturity, harvest operations of the 2026 crop were launched in mid-July. Observers reported the shakers entered the first orchard on July 10 in western Colusa County. Shakers began working in other advanced plantings along the west side of the Sacramento and San Joaquin valleys during the week of July 12 and the first crop to be picked up was delivered to huller/shellers during the week of July 19. For those along the east side and along the Highway 99 corridor, shaking of advanced blocks is expected to begin during the first week of August.

    Growers and observers have noted that hulls have begun splitting in several pollinator varieties, indicating a potentially compressed harvest. However, how the crop will flow though huller/shellers will be determined as more crop arrives in the first weeks of August. Observers have noted thick hulls in many orchards that can potentially reduce flow rates during hulling.

    — Story by Mel Machado, Blue Diamond Growers

  • 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/

  • Blue Diamond Releases Early June Crop Report

    California’s Central Valley experienced variable weather conditions during May, with wide temperature swings serving as the norm for the period, punctuated by a few days of rain.

    Daily maximum temperatures ranged from the lower 60’s to nearly 100 degrees during the month, while minimum temperatures exhibited more stability, ranging from the lower 40’s on the chilliest mornings to mid-50’s under “balmier” conditions. Brisk winds also blew through the orchards on several days during the month, with sustained speeds at double digit levels and gusts reaching over 20 mph. While skies were clear and dry on the majority of days, late season storms in the opening and closing days of the period brought measurable rain to much of the Central Valley. Rainfall totals were generally limited to a few hundredths of an inch. However, the final storm of the month proved more vigorous. While most areas reported receiving from .25 to .60 inch of rain, a particularly strong cell passing over Yolo County dropped over an inch of rain near the community of Davis.

    May 2026 continued the pattern of late-spring storm systems that began in April. Grower activities were largely focused on vegetation management, fertilization, and irrigation, which was offset by adequate rainfall in some cases. While the wet conditions have increased concerns for fungal infections on the foliage and developing nuts, most growers feel that they have adequate protection provided by previous treatments. The rain events have limited the expansion of web-spinning mites and observers are reporting that the orchards are in generally good condition in all areas of the valley. Areas with the strongest winds experienced some blown-over trees, broken branches, and nut loss. However, losses have been minimal.

    Kernels in all varieties became fully solidified during the month, providing the first confirmation of the crop maturity since the completion of the bloom. There is now strong solidarity that the crop is running approximately 10 days ahead of “normal” in all areas. While June temperatures can influence exact timing, many believe the hull split will follow the current advanced timing, with the split in advanced examples of early maturing varieties expected during the week of June 21.

    As May concludes, many growers were winding down applications of fertilizer materials, and mowing vegetation in the orchard middles to manage the orchard floor in advance of the upcoming harvest. Growers whose orchards have high populations of almond feeding ants have begun the earliest treatments using bait formulations to target them. Some of these materials require several weeks to effectively reduce the ant populations and need to be applied as much as eight weeks prior to harvest.

    Growers and their pest control advisers, (PCAs), have been monitoring orchards for signs of leaffooted plant bugs and stink bugs. Brown spot, the damage resulting from the feeding of these insects on the developing nuts has been increasing for several years. Pheromones have been developed and are being tested in orchards to combat leaffooted plant bugs as PCAs work with university researchers to develop protocols for implementation. Growers have treated increasing populations of these insects where warranted.

    Growers have also begun preparations for hull split treatments to control navel orangeworm (NOW). In anticipation of the advanced timing this year, growers are shifting their attention to spotting the discoloration and splitting of blank nuts at the top of the orchard canopy and along the tree rows at the edge of the orchards. These blanks (nuts that formed a hull and shell but were not fertilized during the bloom and have no kernel) split approximately ten days ahead of the sound nuts that contain almond kernels. These serve as a signal of the approaching hull split. By monitoring the split of blank nuts, growers and their pest control advisers can fine tune treatment timing during the split to optimize control.

    Low and minimal care orchards, as well as abandoned plantings, are present in all areas. Pest management programs have grown complicated for many growers managing plantings near abandoned/low care orchards due to adult NOW moths moving into their orchards to lay eggs on the splitting hulls. Orchard sanitation (the reduction of NOW residing within the orchards) is the foundation of NOW management. NOW adults migrating from nearby sources have created significant financial hardship and mounting frustration for growers in recent years. — Story contributed by Blue Diamond Growers

  • When to Spray for Navel Orangeworm

    Navel orangeworm can be devastating for almond and pistachio growers and knowing when and where to spray can often depend on weather. Researchers have been working with state weather services to collect data and determine the best spraying times. Washington State entomologist Dave Crowder discussed these efforts recently with Matthew Malcolm from California Ag Network. Watch this quick video and read 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

  • American Pistachio Growers Awarded $1 Million for Regional Pest Management Collaboration

    American Pistachio Growers (APG), in collaboration with Washington State University, University of California – Riverside, UC Cooperative Extension, the USDA Agricultural Research Service and regional nut industry partners, has been awarded a $1 million grant through the California Department of Food and Agriculture’s Biologically Integrated Farming Systems (BIFS) Program to develop a Regional Integrated Pest Management (IPM) network for Navel Orangeworm (NOW) — the most damaging pest in California’s tree nut industry.

    The project, led by Dr. Houston Wilson (UC Riverside), Dr. David Crowder (WSU), Dr. Jhalendra Rijal (UC IPM), and Dr. Charles Burks (USDA ARS) will pilot a groundbreaking Decision Aid System (DAS) that integrates real-time trap data, weather models, and crop phenology into a single communication platform. The goal is to improve the timing and precision of pest control decisions while fostering regional cooperation among almond, pistachio, and walnut growers.

    “This project moves us beyond the farm gate,” said Joe Coelho, APG’s Director of Sustainability and Member Outreach, who serves as Technical Agronomist and PCA on the project. “For the first time, growers across commodities will have access to shared regional data and communication tools that allow them to anticipate pest pressure before it hits their fields and ultimately make precise, timely treatment decisions. The outcome is fewer sprays, lower costs, and higher quality nuts.”

    Through field-level data acquisition, the system’s meta-analytics will identify regional flight trends coupled with crop-specific phenological development and enhance forecasting of NOW flights — critical steps in breaking the pest’s lifecycle across neighboring farms. Ultimately, the program is expected to help reduce pesticide use, improve nut quality, and lower aflatoxin risk associated with pest damage.

    APG will serve as the grower administration partner, coordinating grower participation and outreach. Carlee Branco, APG Grant Programs Administrator, will conduct on-farm grower coordination, engagement and data collection. “This is a major milestone for sustainable pest management,” said Coelho, “and it demonstrates APG’s leadership in advancing research that directly benefits growers.”

    The Regional IPM for Navel Orangeworm Project represents a pivotal step toward the state’s Sustainable Pest Management (SPM) Roadmap by providing a scalable, data-driven framework that can be expanded statewide.

    “This is exactly the kind of innovation California agriculture needs,” said Dr. Wilson. “Regional coordination is essential to long-term pest reduction, especially for highly mobile insects like the navel orangeworm, and this project will now put those ideas into practice at scale.”

    The program launches in early 2026, with pilot regions in West Fresno County and Modesto, serving as the foundation for a future statewide expansion. Growers within these territories who are interested should contact Carlee Branco for more information at cbranco@americanpistachios.org.

    American Pistachio Growers (APG) is a non-profit trade association representing more than 800 growers and processors across California, Arizona, and New Mexico. APG’s mission is to enhance grower profitability through global marketing, industry research, and sustainability initiatives that promote economically viable and environmentally responsible pistachio production.

  • California Orchards Blossom with NRCS Help Managing Pests

    California’s Central Valley is a land of agricultural abundance, known for its incredible diversity of crops including fruits, vegetables and nuts. It produces approximately 25% of the nation’s food.

    But with plenty can come pests – in as many varieties and types as the crops grown in the region. Area farmers have worked with USDA’s Natural Resources Conservation Service (NRCS) to implement integrated pest management into their orchard operations with marked results.

    Sandra and Mike Smith of Smith Family Farm in Fresno, California, showed NRCS Chief Aubrey Bettencourt the benefits of the practices that they have incorporated with NRCS assistance as they toured their 36-acre almond orchard.

    Established in 1903, the farm is on the cusp of welcoming its fifth generation of farmers. By adapting their operations to increase conservation and sustainability practices, the Smiths hope to pass on a rich legacy to their young granddaughters.

    The Smiths highlighted the impact that integrated pest management practices – notably hormone disruptors – have had in their fight to combat navel orangeworms in their almond orchards.

    “We were at 17.1% loss of our almond crop two years ago because of the infestation of navel orangeworms,” Mike Smith told Chief Bettencourt. “Once we implemented the mating disrupters, we were able to bring our almond reject numbers down to 1.1%.”

    Navel orangeworms burrow into almond nuts to feed on the kernel, damaging the nut and impacting producers’ overall yield and harvest quality. Deploying pheromone-based mating disruption tools can reduce navel orangeworm populations by hindering male moths’ ability to locate females.

    The Smiths have also leaned on NRCS technical assistance to implement other conservation techniques to increase the health of their orchard. The family now prioritizes composting and increasing organic matter, guided by the knowledge gained through NRCS collaboration.

    Further north, Chinchiolo Farming Co., Inc., a family-run business located in Lodi, California, is managing orchards of a different kind while embracing similar production practices.

    Producer James Patrick Chinchiolo has worked to uphold a century-old farming legacy, started by great grandfather Italian immigrant James Joseph Chinchiolo. Chinchiolo has worked with NRCS to incorporate a number of conservation practices including cover crops, tractor replacements, orchard removal and soil incorporation.

    Like the Smiths, Chinchiolo has dealt with pest issues, incorporating a Biologically Integrated Orchard Systems (BIOS) approach in managing his orchards. The BIOS system aligns with NRCS principles, embracing the implementation of conservation practices like cover cropping, beneficial insect habitat, and compost application to keep pests at bay.

    “We aim to foster a more ecologically balanced environment within our orchards,” Chinchiolo said during his discussion with Chief Bettencourt. “We are focusing on minimizing our inputs and creating more habitat for beneficial insects to flourish to help control unwanted pests.”

    Conservation practices like cover cropping and compost application not only help pollinators flourish – a crucial part of growing beautiful cherries – they also protect the trees’ overall health, improving soil structure and water retention.

    After last summer’s heat impacted this year’s cherry crop, Chinchiolo is working to take additional measures to make his trees more heat resistant in preparation for next season.

    “Growing cherries is never predictable. But it’s always beautiful.” Chinchiolo said.

    Helping People Help the Land

    During her visit, Chief Bettencourt emphasized that the agency’s primary focus is to give producers the tools that they need to be the best producers that they can be – increasing their yield while stewarding the nation’s natural resources.

    “Producers are the solution, and we want to empower them by getting our highly skilled staff out in the field to provide technical support. We want to streamline our programs to work better and faster for producers,” she said.

    NRCS helps farmers, ranchers and forest landowners make critical investments in their operations and local communities by helping them implement proven practices to ensure all of America’s farms, ranches and private lands are economically viable and thriving.

    If you are interested learning how these programs can help you achieve your operational and land management goals, find your local USDA Service Center and get started today.

    Follow the Chief through our blog series as she meets with producers across the country to learn how NRCS has helped their operations. — By Debra Denhart, Public Affairs Specialist, USDA

  • What Nut Growers Can Do to Combat the New Carpophilus Pest

    It seems we are always on the verge of some type of apocalypse, and with the new carpophilus beetle invading California tree nut orchards, there is cause for concern.  Watch this brief California Ag Network interview with UC Riverside CE Entomology Specialist Houston Wilson to learn more about this pest and how to stop it from damaging your crops.