Previous Southern Sacramento Valley ET Reports- March 2024
This report covers the CIMIS stations in Woodland, Davis, Staten Island, and Verona for Mar 08 – April 04, 2024. Continue reading
Yearly Archives: 2024
April Walnut Orchard Management Considerations
Read this article for walnut orchard management tasks to keep in mind in April. Continue reading
Potassium Management Options in Prunes
A prune grower’s potassium (K) program can be one of the most critical components of an orchard management plan. Read for more considerations when making a potassium plan. Continue reading
Efficacy of a Hull Split Spray vs. Sanitation for NOW Control
When more NOW larvae make it through the winter, more egg laying will occur next season regardless of what else you do. If you have scarce dollars to spend on NOW control, spend them this winter when they will do the most good in a sanitation program. Continue reading
Winter Chill, Dormancy and Walnut Management – 2023-2024 Update
For three winters, we have been studying the impact of a number of dormancy breaking treatments to give growers tools to deal with low chill winters. This previous winter-spring, we put Dormex at 2% and 4% head-to-head. Continue reading
2024 Emergency Use (Section 18) of Kasumin® 2L Approved for Prevention of Almond Bacterial Blast
Pseudomonas syringae pv. syringae is ubiquitous in orchards, so bacterial blast can develop whenever environmental conditions are right (freezing or near-freezing and wet). While copper sprays have been used to protect trees from bacterial blast, resistance is common in P. syringae populations throughout the state. Unfortunately, it is no longer effective for controlling bacterial blast in some orchards, however, Kasumin® 2L has been shown to be effective. Continue reading
Preventing Bacterial Blast Damage in 2024
In 2023, the cold, wet weather during bloom and leaf-out resulted in bacterial blast damage in many Sacramento Valley almond orchards. If conditions this year are cold and wet during bloom, we may see a recurrence of blast: make a plan now to keep blast damage to a minimum. Continue reading
Walnut Winter Management UCCE Resources
If you haven’t already, look at your orchard operation: take some time to Stop, Think, Observe, and Plan. Read for an overview on resources on topics on spray calibration, sanitation, codling moth mating disruption, pests, and more. Continue reading
Wet winter concerns: Phytophthora and waterlogging
Excessive water, caused by rain, flooding, or even overirrigation, is a challenge for orchards and can cause two very different problems: waterlogging and Phytophthora infection. Given that we had bountiful rain this winter and orchards with standing water were common, continuous monitoring and collaboration with your PCA or farm advisor will be increasingly valuable. Continue reading
Winter sanitation critical for reducing insect pest damage risk to almonds in 2023-2024
Winter sanitation is becoming increasingly important. This past year many growers in the Sacramento Valley experienced levels of navel orangeworm (NOW) damage not seen since the early 1980s. A successful winter sanitation can reduce damage from NOW and other almond-eating pests, like the Carpophilus beetle. Continue reading
Wet years can lead to aerial Phytophthora outbreaks in almond orchards
Pytophthora was detected as early as mid-February in Fresno County and reported statewide by the early summer of 2023. Almond growers should be prepared to respond to strengthening El Niño conditions and the possibility of a recurring outbreak of aerial Phytophthora. Read for insights about the disease symptoms, the pathogen biology, as well as some management guidelines for this relatively rare but serious disease of almond. Continue reading