- Author: Michelle Leinfelder-Miles
The trial was planted in a field of CB46, and fertility and pests were managed by the grower in the same manner as the field. Data are presented in Table 1. Stand counts were made approximately two weeks after planting on July 20th. The stand was assessed as the number of plants per two-foot length. Twelve replicate counts were averaged. We evaluated aphid and lygus damage on September 8th, which were low due to the grower's management. For lygus, we took 10 sweeps from four locations in each plot and counted the lygus. Data were averaged and are presented as a 10-sweep count. For aphids, we used a rating scale from 0 to 10 that accounted for visible crown damage and aphid incidence. In addition to the in-field assessment of lygus, we also evaluated harvest samples for stings and found that, on average, about 1.2 percent of the beans had lygus damage. No diseases were observed.
We harvested on November 6th. All six rows of each variety were cut and raked into one windrow. At the time of cutting, the grower observed that CB77 plants were laying flat, but they were laying in such a way that the knives still picked up the plants. The grower also observed that CB74 had an upright growth habit that could potentially make it a variety viable for swather cutting. We evaluated 100-seed weight as a measure of seed size, evaluating five 100-seed samples per variety.
We would like to thank the cooperating grower, the CA Crop Improvement Association for funding regional trials, and the CA Dry Bean Advisory Board for assistance with statewide research prioritization and assistance with outreach.
Table 1. 2023 Blackeye Bean Variety Evaluation Results
- Author: Michelle Leinfelder-Miles
The trial was drill-seeded on April 27th at a rate of 150 lb/acre, and varieties were replicated three times as 150 ft2 plots. The trial was planted in a field of M-206, and fertility and pests were managed by the grower in the same manner as the field. We harvested the trial on October 12th, and yield was determined by hand-harvesting a 15 ft2 area from each plot.
Table 1 shows results from the Delta location (advanced breeding lines omitted). Among the entries, M-206 is the most commonly planted variety in the Delta and across the state. It has good agronomic characteristics and consistent quality across different harvest moistures. Some Delta growers also plant M-105, which is a very-early variety that has yielded well in Delta trials but may be slightly more susceptible to rice blast disease than M-206. Among the newer varieties, M-210 is early maturing, blast resistant, and may be a good option for the Delta. While variety M-211 performed well in 2023, it is not as well adapted to cooler environments as M-210 and has had variable performance over the last three years (Table 2). Also, M-211 quality tends to decrease below 18 percent harvest moisture. Statewide results of all nine testing locations will be available soon from the UC Rice Research and Information Center.
Special thanks go to the cooperating grower. Thanks also go to Bruce Linquist and Ray Stogsdill, UC Davis, for coordinating the statewide effort, and the CA Rice Research Board for funding. If you have questions about the trial or about Delta rice production, please don't hesitate to reach out to me, and good luck in 2024!
Table 1. 2023 Delta rice variety trial results.
Table 2. Three-year Delta trial yield summary (lb/acre at 14% moisture).
- Author: Michelle Leinfelder-Miles
UC Cooperative Extension will host the SJC and Delta Field Crops Meeting on Friday, January 12, 2024 from 8:00am to 12:00pm. The meeting location is the Cabral Agricultural Center in Stockton (2101 E. Earhart Ave., Stockton, CA 95206). A printable version of the agenda is attached at the bottom of this post. The agenda is as follows:
8:00am Doors Open and Sign In
8:15am Delta Rice Pest Management Update: Michelle Leinfelder-Miles, UCCE, San Joaquin/Delta Counties
8:45am Regulatory Update: Kamal Bagri and Jatinder Gill, San Joaquin County Agricultural Commissioner's Office
9:15am Soil Organic Matter and its Contribution to Plant Available Nitrogen: Daniel Geisseler, UC Davis
9:45am Field Crops Research and Observations from the Sacramento Valley: Sarah Light, UCCE, Sutter/Yuba, Colusa Counties
10:15am Break
10:30am Lima and Garbanzo Breeding and Dry Bean Heat Stress Testing: Christine Diepenbrock, UC Davis
11:00am Insect IPM in Alfalfa: Case Studies of Issues with Alfalfa Weevil and Aphids: Ian Grettenberger, UC Davis
11:30am Compost Application to Alfalfa: Michelle Leinfelder-Miles, UCCE, San Joaquin/Delta Counties
12:00pm Evaluations and Adjourn
We have submitted applications for continuing education. If approved, credits will be for pesticide licensing (DPR: 0.5 of L, 1.5 of O), certified crop advisers (0.5 of NM, 0.5 of SW, 1.5 of PM, 1.0 of CM), and nitrogen/irrigation management (1.25). Light refreshments will be provided.
If you require special accommodations in order to participate in this meeting, please contact UCCE San Joaquin County at 209-953-6100.
I wish you a happy holiday season, and I hope to see you at the meeting in the new year!
2024 Field Crops Meeting Agenda
