Author Archives: Janine Hasey

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

Flooded Orchards, Part 2: Reflections on Past Flooding Events

Experiences with the 1986 and 1997 levee breaks in Yuba and Sutter Counties and other “high–water” events over the past thirty years afford us some expectations for the types and extents of tree damage that may result from orchard flooding in 2017. Here we reflect on the floods in 1986 and 1997 and considers ways in which specific conditions associated with those floods seemed to affect orchard outcomes. Continue reading

Flooded Orchards, Part 1: Generalities of Flooding Damage

Experiences with the 1986 and 1997 levee breaks in Yuba and Sutter Counties and other “high–water” events over the past thirty years afford us some expectations for the types and extents of tree damage that may result from orchard flooding in 2017. Part one of this article will first discuss some generalities of flooding damage and two key types of damage that tend to follow prolonged orchard flooding, i.e., waterlogging and Phytophthora diseases. Continue reading

The Latest on Managing Bot Canker and Blight in Walnut – 2016 Research Updates

Rainfall favors Botryosphaeria (Bot) and Phomopsis canker and blight of walnut when temperatures are over 50° F, so be alert to disease spread this spring and summer. Bot reduces yields by killing small fruit wood and large branches and directly infecting the nut. The focus of this article is on 2016 Bot research findings. Continue reading

Selecting the Right Clonal Rootstock for Managing Soil and Pest Problems

Paradox clones provide options to manage orchard site specific problems or issues. Which are the preferred clonal rootstocks for problem situations? As we have more years to observe walnut rootstock research trials, screening trials, and commercial clonal rootstock plantings, we changed our ratings for crown gall and Phytophthora resistance. Continue reading