Pistachios Archives - West Coast Nut


2019 ‘Off’ Year Pistachio Crop Looks Above Average

Adequate chill over the winter in all California growing regions, plus new acreage coming into production are expected to bring in a harvest that is estimated to be in the 700-850 million pound range. That is not close to record 994 million pounds of pistachios harvested last year in California, Arizona and New Mexico, but is very good production for this alternate bearing crop, said Richard Matoian, executive director of American Pistachio Growers. Increased Acreage Matoian said he is comfortable with the 700-850 million pound range that was forecast at the International Dried Fruit and Nut Congress in May. The favorable weather conditions played a part in the good size crop, but the additional pistachio acreage coming into production continues to boost crop size. The pistachio industry last year reported 260,000 acres of pistachio trees in production. This year, 288,000 acres will contribute to the harvest. The 2020 pistachio crop...

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Golden Hills Nut Cluster

Getting the Most Out of a Golden Hills Pistachio Harvest

Prior to the release of the cultivar Golden Hills, pistachio growers in the San Joaquin Valley (SJV) of California were accustomed to harvesting a single female cultivar named Kerman. Since Kerman was the only female cultivar that most growers had any experience with, the way Kerman was harvested became synonymous with how pistachios, in general, should be harvested. However, different cultivars have “individualities” that should be addressed to make a harvest more successful. What makes for a successful Kerman harvest is not, necessarily, that which makes for a successful Golden Hills harvest and vice versa. Although Golden Hills was released from the University of California breeding program to the pistachio industry in 2005, acreage did not begin to increase appreciably until 2012, when approximately 3000 aces were planted. Assuming all goes well in orchard establishment, pistachio require approximately five or six years to produce a crop worth harvesting. If we...

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Navel Orangeworm NOW

Expanding your NOW Toolbox

By Kathy Coatney | Editor

Overall the first flight of navel orangeworm (NOW) has been lighter than normal this year. This could be attributed to relatively low 2018 damage levels, especially in pistachios, and the cooler, wetter weather during the 2019 spring. “If we get really warm sustained temperatures early in the spring, navel orangeworm wakes up early and becomes active,” according to David Haviland, University of California Cooperative Extension (UCCE) entomology farm advisor for Kern County. But this spring was cooler, overcast and wet, so the first flight was more spread out than normal, Haviland said. NOW Damage “Damage last year in almonds was fairly typical, but in pistachios it was extremely low,” Haviland continued. Less damage at harvest means lower infestation rates in mummy nuts that carry over to the next year. “That’s a positive,” Haviland said. A very low year for pistachio damage benefits other nut crops that might be growing next...

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Distribution Uniformity:

By Dani Lightle, UC Cooperative Extension Orchard Systems Advisor, Glenn, Butte & Tehama Counties

What is Distribution Uniformity? Distribution Uniformity (DU) is a measure of how uniformly water is being applied across the orchard, or whether certain parts of the orchard are receiving more water than others. It is a measure of the irrigation system. DU is a different measure than irrigation efficiency, which is a measurement of how well the applied water matches the crop water requirements. Irrigation efficiency is a measurement of how well you—the irrigator—applies a correct amount of water at an appropriate frequency. However, it is impossible to have a high irrigation efficiency without also having high distribution uniformity (Figure 1). [caption id="attachment_1928" align="aligncenter" width="640"] Figure 1. Illustrations of irrigation uniformity and efficiency. Darker brown soil indicates the wetted soil by the irrigation system, while light brown soil indicates dry soil. a) Water is not applied uniformly, nor efficiently. Trees are getting...

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A Few Arthropod Pests to Consider on Establishing Pistachio Trees

By Kris Tollerup, University of California Cooperative Extension Area-wide IPM Advisor, Kearny Agricultural Research and Extension Center, Parlier, California

The University of California (UC), Pest Management Guidelines provide recommendations for managing approximately 14 insect and mite pests on pistachio. A few of those pests, growers and pest control advisers (PCAs) should pay close attention to during the first few years while young trees establish. According to the National Agriculture Statistic Service, the industry in California has expanded by about 35 percent between 2010 and 2017 from roughly 215,000 to just over 329,000 acres. New plantings in that period ranged from 6,730 (2010) to 24,500 (2013), with acreage expanding by 18,000 in 2017. With so many acres of new pistachio trees in California, it is fitting to highlight a few economically important pests covered by the UC Pest Management Guidelines to prompt growers and PCAs to start thinking about the coming season. A group of insects important on establishing trees is the hemipterans. They have piercing-sucking mouthparts and include true...

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