FREE to Attend. REGISTRATION requested. Please register HERE.

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What: A field day showcasing research and discussing issues in cool-season field crops

When: Thursday, 4/18/2024, from 9:45 AM – 12:30 PM

Location: Westside Research and Extension Center, 17353 W Oakland Ave, Five Points, CA 93624

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For license holders

CEUs (available):

CCA: 0.5 SWM, 0.5 IPM, & 1.0 CM

CDFA INMP: 0.5 N Mgmt. & 1.0 Irrig. Mgmt

CEU (applied for, awaiting approval):

CA DPR: 1.0 Other

See agenda below, or by clicking here:

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AGENDA

9:45      Sign-in

10:00    Introduction of new UC Cooperative Extension Academics

10:10    Mark Lundy (UC Davis/UCCE): Deficit irrigation and water productivity in small grains: Do planting date and crop choice matter? 

10:25    Caitlin Peterson (PPIC): Measuring and comparing winter water use resulting from deficit irrigated small grain and fallow fields 

10:40    Josh Hegarty (UC Davis): Selecting small grain varieties with improved N use efficiency and reduced environmental impacts in the SJV

10:55    Josh Hegarty (UC Davis) and Mark Lundy (UC Davis/UCCE): Small Grain Plot Tours

11:15    Jorge Angeles and Nick Clark (UCCE): Weed control options for ALS-resistant chickweed in wheat

11:30    Giuliano Galdi (UCCE): Glyphosate injury in glyphosate tolerant alfalfa: could it happen in the SJV

11:45    Nick Clark (UCCE): Garbanzo bean variety trial and plot observations

12:00    Nick Clark (UCCE) and Christine Diepenbrock (UC Davis): Garbanzo Plot Tours and Survey

12:15    Lunch

 

Between 22 and 27 Feb, Ascochyta blight in garbanzo beans was detected in the Five Points/Lemoore area.

This disease has potential to cause economic damage, is favored by wet conditions and moderate temperatures, and rain is in the forecast for Friday, March 1^st and Sunday, March 3^rd.

Fungicides, such as Endura (boscalid), Headline (pyraclostrobin), or Quadris (azoxystrobin) applied to garbanzo foliage preventatively will reduce risk of loss due to this disease.

Consult product labels carefully before applying a fungicide treatment to ensure the most effective application method, timing and rate.

Here are recent resources for more information about Ascochyta blight in garbanzos:

https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=26328

https://ipm.ucanr.edu/agriculture/dry-beans/ascochyta-blight-garbanzo-beans/

Below are photos by Tom Turini showing typical signs and symptoms of Ascochyta blight of garbanzo on plant samples recently collected in the Five Points/Lemoore area.

Circular lesions with dark centers and foliar dieback on garbanzo bean plant.

Garbanzo bean leaves with necrosis and small dark ifungal structures (pycnidia) of Ascochyta rabiei.

Garbanzo bean plant with stem lesion and substantial dieback.

We evaluated blackeye bean varieties in a commercial field in Stanislaus County. The season began with cool and wet spring conditions, which lasted through the month of June and delayed planting. Seven varieties from the University of California blackeye breeding program were planted on July 7^th. The varieties were grown on a Hanford sandy loam, and the soil temperature was approximately 75°F at the time of planting. Each variety was planted across six rows on 30-inch spacing, on a row length of approximately 275 feet. The seeding rate was 40 pounds per acre. This was a non-replicated evaluation due to a limitation in seed; therefore, no statistical analysis is presented.

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 20^th. 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 8^th, 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 6^th. 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