- Posted by: Gale Perez
From Growing Produce by | November 27, 2018
Field Scouting Guide: Palmer Amaranth
This month's field scouting guide concentrates on Amaranthus palmeri S. Watson.../h2>/span>
From the Topics in Subtropics blog (Oct. 15, 2018)
Although the main objective of herbicide use in avocado orchards (and all crops) is to manage weed populations, sometimes unintentional injury of the crop itself can occur when herbicides are incorrectly applied. Herbicide injury in avocado can reduce yield, decrease fruit, reduce plant vigor, increase susceptibility to diseases and pests, and sometimes result in plant death. Common situations resulting in injury include spray drift, tank contamination, application of the...
Herbicides are the main means of controlling weeds. Recently, there has been increasing concern over the potential impacts of climate change, specifically, increasing temperatures and elevated carbon dioxide (CO2) concentrations, on the sensitivity of weeds to herbicides. A postdoctoral fellow in my lab, Maor Matzrafi, investigated the response of horseweed and lambsquarters to treatment with glyphosate under the higher temperatures and CO2 levels that are predicted to exist in northern California around 2050. Maor showed that the sensitivity of both weeds to glyphosate was reduced in response to increased temperature, elevated CO2 level, and the combination of both factors. He also found that...
- Author: Thomas Getts
Heat is something that many Californians are used to, and live with for several months out of the year, but prolonged triple digit heat is not something I am used to in my corner of the state. Sure it gets hot up here in Lassen County, but there is most often a place to retreat from the heat.
A couple of weeks ago I was feeling hot, sweltering in the triple digits of Canyonlands National Park in Utah, which in all honesty would be considered a moderate day for my colleagues down in the Imperial Valley. But, I live in northern California, and what I was seeing made me think I was hallucinating from the heat. I did a double take because a good portion of the vegetation surrounding the river was turning brown and dropping their...