We invite you to attend a Delta Rice Workshop on Wednesday, August 23rd from 10:00am to noon on Staten Island (23319 N. Staten Island Rd., Thornton). The workshop is collaboratively supported by Fish Friendly Farming, the Delta Conservancy, Conservation Farms and Ranches, the CA Land Stewardship Institute, the Regional Water Board, and UC Cooperative Extension. Organizers will demonstrate the use of a recirculation pump in rice production, with a discussion of potential financial support programs. Additionally, there will be a presentation on The Nature Conservancy's Bird Returns Program, and I will provide an update on UCCE research in Delta rice.

The agenda is below, and more information is available from the attached flyer. CDFA INMP (1.0) and CCA (1.0 SW, 0.5 CM) continuing education credits have been approved. We hope to see you at the meeting!

Agenda:

Introductions

Fish Friendly Farming and Delta Conservancy/Regional Board funding - Laurel Marcus, FFF

Recirculation Pump System - Jerred Dixon, Conservation Farms and Ranches

Can funding programs such as SWEEP be used for recirculations pumps and pipelines - Laurel Marcus, FFF

Bird Returns Program - Julia Barfield, TNC

Research Activities in Delta Rice - Michelle Leinfelder-Miles, UCCE

UC Davis and UC Cooperative Extension will host the UC Dry Bean Field Day on Tuesday, August 15, 2023 from 9:30am to 11:30am. The field day will begin along Bee Biology Road on the UC Davis campus. The agenda is pasted below, and a downloadable version is attached to the bottom of this post. DPR (1.0) and CCA (1.0 Crop Management, 1.0 Pest Management) continuing education credits have been approved. Thanks for your interest, and we hope to see you at the field day!

Agenda:

9:30am     Welcome and introductions: Christine Diepenbrock and Antonia Palkovic, UC Davis; Michelle Leinfelder-Miles, UC Cooperative Extension

9:35am     How can we further improve lima bean? A project funded by the USDA to improve breeding resources: Paul Gepts, UC Davis

9:50am     Walk through and discussion of lima breeding material: Antonia Palkovic and Christine Diepenbrock, UC Davis

10:00am   Field diagnostics – bean pest identification and management: Sarah Light, Michelle Leinfelder-Miles, Nick Clark, UC Cooperative Extension

10:30am   Travel to Veg Crops location (38.534222, -121.782222)

10:35am   Blackeye varietal improvement - update on new pest-resistant varieties: Bao-Lam Huynh, UC Riverside

10:55am   Results from round one of “speed breeding”, and testing nutritional alongside agronomic traits in limas: Christine Diepenbrock, UC Davis

11:00am   From farm to (robot) stomach: what are the trait profiles of California beans after harvest?: Tayah Bolt, UC Davis

11:05am   Screening for drought resilience in common and tepary beans: Matthew Gilbert, Tom Buckley, Troy Magney, Paul Gepts, Chris Wong, Antonia Palkovic, Travis Parker, UC Davis

11:20am   Evaluating productivity and quality of cowpea and interspecific common/tepary bean in Davis and Parlier (contrasting temperatures): Sassoum Lo, Jonny Berlingeri, UC Davis

11:25am   Developing low-cost phone apps/drone and rover platforms to measure agronomic traits: Earl Ranario, Heesup Yun, Vivian Vuong, UC Davis

11:30am   Discussion and evaluation

Diagnosing problems in the field is never an easy task, but it is one of the most interesting aspects of my job because I usually never encounter the same set of circumstances twice. This summer, I have been called out on a few interesting diagnostics calls, and I wanted to share some observations.

I visited a blackeye bean field that was planted at the end of June. Since June was unusually cool this year, the grower's planting was delayed. Blackeyes shouldn't be planted until the soil temperature reaches at least 65 degrees F, and the cool spring conditions kept the soil cool. About six days after planting, the beans were only sporadically emerged. The plants that had emerged looked healthy, but the overall stand was poor. The grower said that soil moisture was good at the time of planting. I scratched down and found the seed about three inches deep, which is perhaps a little bit deep for blackeyes. Seed had germinated, and the germinated seed looked healthy with no apparent seedling diseases. Seedling diseases include Pythium and Rhizoctonia. Pythium symptoms appear as water-soaked lesions, and the hypocotyl eventually ‘dampens off'. Rhizoctonia symptoms appear as reddish-brown lesions that can girdle the stem. We felt better that it didn't appear to be a disease problem. I reached out to my farm advisor colleague, Rachael Long, to get her take on the situation, and she agreed that this was likely delayed emergence due to cool soil and a deeper planting depth. In the end, we decided to test our patience, wait a few more days, and see what would happen. After another five days, the grower let me know that the plants had emerged, and the stand looked good!

In mid-July, I was walking through a rice field and observed reddish-brown spotting on leaves that were above the water (Figure 1), and older leaves had turned brown and were in the water. I thought about stem rot, which is a disease we have observed on some Delta farms, but I wasn't observing black lesions at the water line. I contacted my colleague, Luis Espino, who has done disease management work in the Sacramento Valley. He didn't think the symptoms resembled a disease, but rather, a nutrient deficiency, like possibly potassium. I think a potassium deficiency is a reasonable hypothesis. We know that soil potassium is low in some Delta soils. Also, potassium is removed from the system in large quantities after harvest, especially in fields where the straw is baled. UC Rice Specialist, Bruce Linquist, has researched this and summarized it in this fact sheet. For a 90-cwt yielding crop, approximately 26 lb K/ac is removed in the grain, but about 28 lb K/ac is removed for every ton of straw. At this field, we advised leaf tissue testing. Between tillering and panicle initiation, the Y-leaf should have a K concentration of at least 1.5%. At heading, the flag leaf should have a K concentration of at least 1.2%. Bruce has also created a fact sheet on rice tissue nutrient concentrations. If growers are baling straw, I would advise soil sampling to determine whether soil K concentrations are declining over time.

In late July, I visited a corn field with my new Agronomy Advisor ‘neighbor', Giuliano Galdi. Throughout much of the field, there were plants that were drying up and dying. We didn't have a soil analysis, and what information we had on field history was limited. We noticed that manure had been applied to the field. One of our initial thoughts was salinity injury, but the symptoms didn't seem quite right. With salt damage, we would have expected to see necrosis along the leaf margins. Instead, what we were observing were leaves that were fused and unfurled (Figure 2). We called our colleague, Nick Clark, and Nick noted that he had observed symptoms like this in the southern San Joaquin Valley. He noted that when extreme weather heats up the soil, it can cause these symptoms when the plants emerge. Symptoms will vary based on the amount of plant emergence when the hot weather (i.e. hot soil) occurs. If the growing point of the plant is above the soil at the time of the heat, the plants may only have minimal damage, like a band across the older leaves. However, we suspect that the burned-up plants met their demise because the growing point was at the soil line at the time of the heat. Of course, it wouldn't hurt to get the soil analyzed just to make sure there aren't other conditions impacting the crop.

The UCCE network has a breadth of experience to help identify problems and provide potential management solutions. Please don't hesitate to contact me if you'd like help with diagnosing problems in the field.

UC Davis and UC Cooperative Extension will host the UC Dry Bean Field Day on Tuesday, August 15, 2023 from 9:30am to 11:30am. The field day will begin along Bee Biology Road on the UC Davis campus. The agenda is pasted below, and a downloadable version is attached to the bottom of this post. DPR continuing education (1.0) is pending. CCA continuing education credits have been approved (1.0 Crop Management, 1.0 Pest Management). Thanks for your interest, and we hope to see you at the field day!

Agenda:

9:30am     Welcome and introductions: Christine Diepenbrock and Antonia Palkovic, UC Davis; Michelle Leinfelder-Miles, UC Cooperative Extension

9:35am     How can we further improve lima bean? A project funded by the USDA to improve breeding resources: Paul Gepts, UC Davis

9:50am     Walk through and discussion of lima breeding material: Antonia Palkovic and Christine Diepenbrock, UC Davis

10:00am   Field diagnostics – bean pest identification and management: Sarah Light, Michelle Leinfelder-Miles, Nick Clark, UC Cooperative Extension

10:30am   Travel to Veg Crops location (38.534222, -121.782222)

10:35am   Blackeye varietal improvement - update on new pest-resistant varieties: Bao-Lam Huynh, UC Riverside

10:55am   Results from round one of “speed breeding”, and testing nutritional alongside agronomic traits in limas: Christine Diepenbrock, UC Davis

11:00am   From farm to (robot) stomach: what are the trait profiles of California beans after harvest?: Tayah Bolt, UC Davis

11:05am   Screening for drought resilience in common and tepary beans: Matthew Gilbert, Tom Buckley, Troy Magney, Paul Gepts, Chris Wong, Antonia Palkovic, Travis Parker, UC Davis

11:20am   Evaluating productivity and quality of cowpea and interspecific common/tepary bean in Davis and Parlier (contrasting temperatures): Sassoum Lo, Jonny Berlingeri, UC Davis

11:25am   Developing low-cost phone apps/drone and rover platforms to measure agronomic traits: Earl Ranario, Heesup Yun, Vivian Vuong, UC Davis

11:30am   Discussion and evaluation