Author Archives: Brent Holtz

About Brent Holtz

Brent Holtz is a University of California Cooperative Extension pomology farm advisor for San Joaquin County.

Aspergillus niger induced hull rot on almond

Written By Brent Holtz, Ph.D., UCCE Farm Advisor San Joaquin County   In September I visited an almond orchard in San Joaquin County with the Supareil variety showing symptoms that looked very similar to hull rot typically observed on Nonpareil.  Symptoms showed dieback of vigorous young shoots and lower limbs (photo 1-blighted shoots).    Leaves were […]

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Pruning First Leaf Potted Trees

Written by Brent Holtz (UCCE San Joaquin) and David Doll (UCCE Merced) The first dormant pruning of potted trees can present some difficulties when selecting primary scaffolds. Potted trees are often planted throughout the year because growers are no longer limited to planting bare root trees while they are dormant. Many successful orchards have been […]

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Whole Orchard Soil Re-incorporation: an Alternative Orchard Removal Strategy

Written by Brent Holtz (UCCE San Joaquin) and David Doll (UCCE Merced) You may have heard the news—co-generation plants are limiting the amount of chipped biomass they are accepting.  This is reducing the rate in which old orchards are removed, impacting the orchard redevelopment process. The soil incorporation of chipped or ground almond, peach, plum, […]

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