by David Doll, UCCE Pomology Farm Advisor (see also http://thealmonddoctor.com/)
With the emergence of herbicide-resistant weed populations, several perennial nut crop spray programs incorporate the use of pre-emergent herbicides. The correct use of these types of products provide the ability to control weeds for an extended period – sometimes into the late spring or early summer – reducing in-season burndown applications. When applying these products, proper application is critical to maximize weed control and the following points should be considered.
Herbicide selection. Pre-emergent herbicide selection should be based on the weed spectrum...
- Author: Carl E. Bell
- Posted by: Gale Perez
From the Invasive Plants in Southern California blog :: June 11, 2014
Preemergence herbicides for wildland weed control
Kill weeds before they ever see the light of day; sounds great, doesn't it? That is what preemergence herbicides are for. They are a mainstay in commercial agriculture and ornamental landscapes, so why not in wildlands? While there are situations where they would be very helpful I have some concerns that make me reluctant to recommend them in general.
First of all, what is a preemergent herbicide? (The shorthand version is PREE, so I'll use that term for the rest of this blog.) These are...