- Posted By: Gale Perez
- Written by: Janet Byron, (510) 665-2194, email@example.com Janet White, (510) 665-2201, firstname.lastname@example.org
Producing 85 percent of the nation’s strawberries, California growers urgently need alternatives to methyl bromide fumigation if they are to maintain yields. Methyl bromide has been phased out for all but critical uses because it depletes ozone in the upper atmosphere.
UC scientists now report that use of totally impermeable film in strawberry fields can improve the effectiveness of a widely-used MB alternative known as 1,3-D (1,3, dichloropropene). Use of the film reduces the amount of 1,3-D needed to maintain yields, while lowering field emissions overall.
The strawberry industry is highly dependent on soil fumigation to control pests and maintain high yields. The methyl bromide alternative, 1,3-D, can be used...
- Posted By: Brad Hanson
- Written by: WSSA press release
Weeds can be introduced to new areas from a variety of natural and human-influenced sources. Seed transport on vehicles or equipment can be a very important mechanism of spread.
The WSSA article below focuses on transport of invasive weed seed on recreational and work vehicles in rangeland areas but the same concepts hold true in agricultural or residental situations. Have you ever run a mower or tiller through a weedy area and then looked closely at the amount of vegetative matter (and potenially seeds) on the mower deck or in the nooks and crannies of the machine? All that junk (and seeds) can fall off in subsequently visited areas and introduce new weed species or biotypes into the new area.
It is a good...
- Author: Brad Hanson
When talking about chemical weed control, a lot of different terms are used to describe the chemicals and application techniques being used. Some are terms are pretty straight forward while others are a little more specific or specialized. I thought it might be a good time to run through a few commonly used terms. Feel free to add (via comments) any important terms that I miss and I’ll try to edit them in over time.
Preemergence (or preemergent) herbicides. Herbicides that are applied before the target weed germinates and emerges. Many, but not all, preemergence herbicides have little activity on existing vegetation. Instead, they act on the roots or shoots of newly germinated seeds – often killing the...
- Author: Chris McDonald
How many times do we see some plant that looks unusual, we let it sit for a while, pondering its existence (maybe that's just me), and then realize its some plant we have never seen before? In that moment we try to find it again and its either gone or gone to seed!
One concept that is difficult to grasp is exponential growth. This is not the basic math, growth model that is familiar (if I have earn $5,000 selling seeds, then after ten years I'll have $50,000, yeah!). Its like growth on steroids. This is the growth that produces stunning results that boggle the mind. I think we have all seen the gimmicks, chain letters and recipes, facebook posts giving 5 people good luck, Bernie Madoff they are all based on exponential...
- Author: Brad Hanson
Residual or soil applied (ie. preemergent or PRE) herbicides can provide many benefits to weed managers. In contrast to foliar-applied (postemergent) herbicides that only affect the weeds present at the time of the application, residual herbicides persist in the soil and have activity on weeds that germinate after the application. Depending on the chemistry of the specific herbicide, the rate applied, weed spectrum in the field, and environmental conditions, weed control may last for several weeks or months.
When performance problems arise with residual herbicides, they usually take the form of either unexpectedly short or unexpectedly long residual activity. As illustrated in the line diagram below, our goal with residual...