- Author: Brad Hanson
- Author: John A Roncoroni
Vineyard Herbicide Trial Field Meeting
Date: July 21, 2015
Time: 9:00 am – 10:30 am
Location: Muller Ranch Vineyards
34998 County Road 18, Woodland, CA 95695
UC Cooperative Extension...
- Author: Brad Hanson
Pop quiz.
Today's post is a) long, b) recycled from another use, c) of high interest due to current weather conditions, or d) all of the above? The correct answer, I think, is "D" all of the above.
As an aside, the length of this post reminds me of one of my favorite Mark Twain quotes " I didn't have time to write a short letter, so I wrote a long one instead" - there's a lot of truth in that.
Ok, this is actually an article I prepared for the meeting booklet for the Plant...
- Author: Lynn M. Sosnoskie
Irrigation is crucial for the production of melons in California. It facilitates seed germination, it is essential for crop growth and fruit production, and, for growers that apply pre-emergence herbicides, it is necessary for product activation.
Pre-plant irrigation (pre-irrigation) is used to develop an optimal planting bed for the crop, however, it can also stimulate weed seed germination. Knowing this, growers must be prepared to use pre-emergence (i.e. soil-applied, residual herbicides) or post-emergence (i.e. flaming, or foliar-applied herbicides) to reduce crop-weed competition. Early weed control is important; to maximize crop yields, young melons should remain weed-free for up to eight...
- Author: Seth Watkins
- Author: Brad Hanson
Compared to some other tree crops, California olives have relatively few registered preemergence herbicide options. However, several recent label changes have increased these options and a few new herbicides are currently being tested and may be registered in the relatively near future.
Several new herbicides have been registered in other tree and vine and UC weed scientists have conducted several experiments with the support of the California Olive Commission, the USDA IR-4 Project, and the crop protection industry to evaluate their crop safety in olives. Although these herbicides are not currently registered in olive, early crop safety results have been mostly promising with penoxsulam (PindarGT), rimsulfuron (Matrix),...
- Author: Lynn M. Sosnoskie
Despite the increasing potential for rain this week, California remains poised to experience exceptional drought conditions in 2014. Under prolonged periods of dry weather, weed control is likely to suffer. This is especially troubling for growers as both crops and weeds will be competing to capture limited soil moisture, which could result in significant yield losses.
Although fewer weed seeds may germinate under dry conditions, weeds that do emerge and become established may be more difficult to manage with herbicides. Drought-stressed weeds are likely to have thicker cuticles (which is the waxy coating on the surface of the leaf), which can inhibit the absorption of post-emergence products. Additionally, plant architecture...