Agronomy Research & Information Center
Agronomy Research & Information Center
Agronomy Research & Information Center
University of California
Agronomy Research & Information Center

Agronomy Blog

  • Frost Injury in Wheat

    Fig. 1. Yellowing and tip burning of wheat from frost injury. (Photo courtesy of PCA.)

    I have received a couple inquiries from Pest Control Advisors about wheat that is showing leaf tip yellowing and burning (Fig. 1). Their suspicion is frost injury, and with the weather we have experienced over the last several weeks, their suspicion is likely true.  There isn't a hard-fast...

  • Field Corn Variety Trial Results

    Table 1. 2017 UCCE Field Corn Variety Trial Results

    The results of the 2017 UCCE Delta field corn variety trial, located on Tyler Island, are shown in Table 1 (below). Three replicate blocks of fifteen varieties were planted on May 9th by air planter. The trial was planted almost two weeks later than the 2016 trial, due to the wet winter and spring....

  • White Mold in Garbanzo Beans- Often Attacks Stems Near the Soil Line

    White mold in garbanzos often infects the plant stems near the soil line.

    Our cool, wet conditions are favoring white mold (sclerotinia) in garbanzo beans this year. This disease is characterized by a white fungal growth that attacks the above ground plant parts, often near the soil line for garbanzos. The affected tissue dries quickly and bleaches to a pale tan or...

  • White Mold in Lima Beans

    Figure 1. Sclerotia of white mold disease.

    I was recently contacted by a Pest Control Advisor (PCA) regarding a lima bean field in the Tracy area. The plants were showing some unusual symptoms, and while the field was nearing harvest, the grower was hoping to get another couple weeks out of it for pod fill. The PCA had already collected...

  • Soil Temperatures for Planting Blackeye & Large Lima Beans

    Figure 1. Bean seeds rotting fromPythium rot infestation.

    A grower recently called to ask about the minimum soil temperature for planting blackeye and large lima beans. The University of California, Division of Agriculture and Natural Resources has produced production manuals for both blackeyes and limas. A general guideline for blackeyes is to plant as...

  • Scouting in Garbanzo Beans

    Figure 1. Ascochyta blight on garbanzo bean leaves.

    A pest control advisor recently contacted us to ask what pests he should be scouting for in garbanzo beans. His clients had not grown garbanzos in the past but have some acreage this year. Given recent wet weather and relatively mild temperatures, there are three diseases for which we suggest...

  • Garbanzo beans hit hard by Alfalfa Mosaic Virus in California in 2015

    Garbanzo field with alfalfa mosaic virus, May 2015, Yolo County.

    This disease is vectored by aphids (pea, cowpea, and green peach) with alfalfa the common host of the virus. One usually won't see aphids in garbanzos, as after they land and feed (and introduce the virus) they either die or leave, due to the acidic exudate of the garbanzos that deters them. This...

  • UC Field Day showcases California‚Äôs dry-bean research advancements

    Dry Bean Varieties

    California consumers may not “know beans about beans,” but they should. Dry beans are a big business in California. In 2011, growers harvested 45,000 acres of dry beans valued at $58 million. Lima beans accounted for about 40 percent of this total acreage, with California producing...

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