Sacramento Valley Orchard Source

Implementing a herbicide strategy to control the weeds that have survived your summer control program, as well as the newly emerged winter weeds, is a task that exemplifies starting with a clean slate in 2019.

Fully dormant walnut trees are a relatively frost tolerant crop. Fully dormant mature trees can tolerate temperatures to the low 20’s (°F) or below. However, if the first one or two freeze events have lows down to around 28° F, damage will likely ensue.

Irrigation Evapotranspiration (ET) Report for the Woodland, Davis, Dixon, and Verona CIMIS stations.

Irrigation Evapotranspiration (ET) Report for Tehama, Butte and Colusa county CIMIS stations.

In research conducted by Themis Michailides, winter pruning (February) resulted in higher infection rates than fall pruning (October).