Author Archives: Janine Hasey

Walnut Trees in the Nursery Trade: Terminology, Propagation, Availability, & Pest Interactions

Updated October, 2018. Originally posted June, 2016. Janine Hasey, Chuck Leslie, Wesley Hackett, Pat J. Brown, Andreas Westphal, Michael McKenry, Greg Browne, & Dan Kluepfel.  Helpful terminology in understanding walnut plant material: Cultivar (cultivated variety) – A named group of … Continue reading

Training Young Walnut Trees: No Pruning vs. Minimum Pruning Compared

Training young walnut trees occurs in the first 1-6 years in the life of an orchard. Traditionally it has been done using a modified central leader with a minimum pruning style. Research conducted since 2004 investigating pruning versus non-pruning on young walnut tree growth and productivity has challenged that paradigm. Continue reading

What to Do this Spring for Flood Damaged Trees

2017 brought us unprecedented high and fluctuating water flows in the Sacramento and Feather Rivers, damaging orchards from direct flooding and indirectly via under-levee seepage. Many trees had a long exposure to waterlogged conditions through the winter and spring. This article discusses strategies for minimizing losses in 2018 in flood-impacted orchards. Continue reading

2017 Research Results on Flood Damaged Trees

2017 brought us unprecedented high and fluctuating water flows in the Sacramento and Feather Rivers, damaging orchards from direct flooding and indirectly via under-levee seepage. Many trees had a long exposure to waterlogged conditions through the winter and spring. This article details our observations and research on tree survival, disease, and recovery. Continue reading

Summer Flooded Orchard Damage Update, Part 3: Resources for Flood Damaged Orchards

In 2017, high and fluctuating water flows, unprecedented for their duration, passed through the Sacramento and Feather Rivers. Orchards were hurt by these flows due to direct flooding, indirect flooding via under-levee seepage, and loss of land through river bank erosion. Many orchards had standing water from January through mid-May. In other orchards, ditches overflowed with nowhere to pump water out. Part 3 of this article provides some resources that may be helpful for owners of flood damaged orchards. Continue reading

Summer Flooded Orchard Damage Update, Part 2: Management Considerations

In 2017, high and fluctuating water flows, unprecedented for their duration, passed through the Sacramento and Feather Rivers. Orchards were hurt by these flows due to direct flooding, indirect flooding via under-levee seepage, and loss of land through river bank erosion. Many orchards had standing water from January through mid-May. In other orchards, ditches overflowed with nowhere to pump water out. Part 2 of this article discusses best practices to consider for orchard management after a flood event. Continue reading

Summer Flooded Orchard Damage Update, Part 1: Observations and Research Plans

In 2017, high and fluctuating water flows, unprecedented for their duration, passed through the Sacramento and Feather Rivers. Orchards were hurt by these flows due to direct flooding, indirect flooding via under-levee seepage, and loss of land through river bank erosion. Many orchards had standing water from January through mid-May. In other orchards, ditches overflowed with nowhere to pump water out. Part 1 of this article details our observations on flooded orchard damage as of early June and current research plans. Continue reading