- Posted by: Gale Perez
Have you listened to a Growing the Valley podcast? Here are a couple you might want to check out.
Old and New Perennial Weeds with Dr. Brad Hanson
In this short episode, Phoebe Gordon chats with Dr. Brad Hanson, Weed Specialist with UC Davis. They talk about perennial weed management, as well as two species that have recently become problematic in orchard crops: alkaliweed and threespike goosegrass. We don't know a...
/h4>- Author: Caio Brunharo
- Author: Brad Hanson
- Posted by: Gale Perez
Summer grass weed species are becoming more troublesome in orchards in the Central Valley of California. Feather fingergrass, junglerice, sprangletop and threespike goosegrass, to name a few, are summer grass weed species that germinate (or in some cases, resume growing) when the soil temperatures start to rise in the spring, develop during the summer and complete their life cycle in the fall. With such a life cycle, summer grass weed species reach their maximum biomass accumulation late summer/early fall – coincidently when harvest operations are taking place – if previous weed management approaches were inefficient. To make matters worse, some of the mentioned weed species have some degree of glyphosate...
- Re-posted by: Gale Perez
From Growing Produce by | November 27, 2018
https://www.growingproduce.com/vegetables/field-scouting-guide-palmer-amaranth/
Field Scouting Guide: Palmer Amaranth
This month's field scouting guide concentrates on Amaranthus palmeri S. Watson...
/h2>/span>- Author: Travis M Bean
- Re-posted by: Gale Perez
From the Topics in Subtropics blog (Oct. 15, 2018)
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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...
- Author: Marie Jasieniuk
- Posted by: Gale Perez
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...