Your source for orchard news & information in the Sacramento Valley
This is the third in a three part series looking at past experiences of flooded orchards. Here we offer management steps to consider in dealing with orchard flooding in 2017. Continue reading
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
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
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
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 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
How are we doing on chill so far this year? Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chill based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. Continue reading
How are we doing on chill so far this year? Because there is not a CIMIS station close to Yuba City, Janine Hasey calculates chill based on a temperature recorder at the UCCE office in Yuba City. Chill data will be updated weekly. Continue reading
Fall is rapidly approaching, and with it is the appropriate planting time for a cover crop in walnuts. Continue reading
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
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
Too much rain for you this winter? This post contains information on record keeping and resources for damages related to the flooding observed this winter. Continue reading