The recent rain events in California have complicated crop production activities for many growers including delayed planting or harvesting and altered pest management activities (including weed control).
Below are my thoughts about the possible impacts wet weather could have on weeds and weed suppression:
- Rains can facilitate seed germination and seedling emergence although wet soils may delay post-emergence control activities (be they chemical or physical operations). Sarah Light, a UC advisor working in the Sacramento Valley, wrote this blog post last year about soil compaction and strategies to avoid it (
Mark your calendar!
July 15, 2019
The 3rd Annual UAV/Ag Technology Field Day
Presented by UC Cooperative Extension, Merced County
9am to 11:30am (CE registration begins at 8:30am)
After the recent spate of storms, reports of hail damage have come in to several UCCE offices. In response, Dr. Bob Hutmacher prepared the following information (a printable pdf document is available at the end of the post):
We have had some unusual weather so far in 2019, with repeated cool spells, thunderstorms and rain, and within the past week, some widespread locations getting hail. While hail damage can be a fairly common late spring and early summer occurrence in many cotton production regions across the U.S., it is a much more unusual problem here in the San Joaquin Valley. In addition, cotton has been growing more slowly than usual this year due to cloudy, generally cool...
University of California Small Grains - Alfalfa/Forages Field Day
Wednesday, May 15, 2019
UC Davis Department of Plant Sciences Field Headquarters
2400 Hutchison Dr., Davis, CA 95616, Davis, CA
8:00-4:30 Includes Lunch
The annual UC Small Grains/Alfalfa-Forages Field Day will be held on May 15th at the University of California, Davis
The importance of proper weed identification
Weeds are a problem in a variety of systems, from agronomic and horticultural crops, to orchards and vineyards, to turf and ornamentals, to rangelands, and to natural areas. The first step in developing a successful weed management program is to ensure that the unwanted vegetation has been identified correctly. Not all weeds respond equally well to all treatment measures. For example, broadleaf weeds will be managed by the auxinic herbicides (WSSA Group 4) whereas grasses will not. Mowing may be more effective at suppressing upright growing species as opposed to those that are more prostrate. Shallow cultivation may control annual weed species while missing...