Author Archives: Luke Milliron

2022 Emergency Use (Section 18) Approved for Almond Bacterial Blast Material

Bacterial blast (Pseudomonas syringe), although thankfully not a problem every year (hopefully including 2022), can be tremendously damaging to almond yields. For example, significant crop damage was reported in the Sacramento Valley in 2017 and 2018, and in the San Joaquin Valley in 2017 and 2019. These grower reports of past crop loss supported a Section 18 emergency request for the use of kasugamycin on almonds during bloom. Continue reading

Managing Mold in Walnut

Growers and processors have reported elevated mold levels in harvested walnuts to farm advisors and Dr. Themis Michailides, UC Davis Plant Pathologist. Although all possible predisposing factors have not yet been investigated, conditions that compromise the integrity of the hull, such as walnut blight, sunburn or insect-damage can serve as an entry point for mold fungi. Continue reading

November 2020, Another Major Autumn Freeze in California Walnuts

As if 2020 didn’t bring enough grief, it appears to have also brought a major autumn freeze that growers and their consultants are now taking stock of. UCCE walnut advisors in the northern Sacramento Valley and Northern San Joaquin Valley have been fielding calls in the past couple weeks regarding extensive damage in young and mature orchards. Continue reading