Leeks were grown on 589 acres in Monterey County in 2018 and were worth $10.8 million. Depending on the planting date, they can be in the field for 120 or more days, particularly if they are over wintered. They can be grown from seed, but are commonly transplanted to overcome slow initial plant growth. Weed control in leeks is quite challenging because, like onions, they never form a dense crop canopy that can effectively compete with weeds. In addition, given the long crop cycle, a leek planting may experience flushes of both cool and warm season weeds.
Weed control options in organic leeks consist of 1) locating leek planting on blocks with low weed pressure (e.g. blocks with careful weed control in prior crop rotations), 2)...
Why scout for weeds?
While weeds are present in every orchard, there is variation in the weed species composition and density from orchard to orchard. Scouting for weeds is the basis for a good Integrated Weed Management (IWM) plan. Information gathered from weed scouting allows growers to:
- Evaluate the current year's weed control program
- Adjust control practices for the following year
- Discover weed stands and possible resistance before they spread throughout the orchard
- Select the best control option for species of concern, such as:
- Choosing appropriate management...
In order to prevent herbicide damage in young trees, especially from postemergence herbicide, standard pomological practice is to apply white latex paint to the bottom 2 to 3 feet of trunk of newly planted trees, before applying herbicides. While this may provide some level of protection, research to support this practice is lacking. In order to assess the efficacy of white latex paint in mitigating herbicide damage, a field experiment was conducted in Arbuckle, CA to evaluate the impacts of latex paint on herbicide injury in young almond trees.
- Author: Brad Hanson
Its not too late to register for the San Joaquin Valley Spray Application Short Course (November 12-14).
Here's a link to the webpage: https://ucanr.edu/sites/SJVSprayApplication/Home/
Here's a link to the full agenda: https://ucanr.edu/sites/SJVSprayApplication/Agenda/
Reposted from the UCANR Sacramento Valley Field Crops blog
Mechanical cultivation is a useful tool in controlling herbicide-resistant Italian ryegrass individuals in a rainfed wheat system but is only about half as effective as Axial in reducing overall pressure from Italian ryegrass (expressed as a percentage of total groundcover). Growers should consider multiple approaches (chemical and mechanical) and integrate IPM strategies to reduce the spread of resistance among...