Agfax Buzz:
    June 21, 2013
    soybean-rust

    Texas Rice: Leaf Blast Reemerging in 2013

    AgFax.Com - Your Online Ag News Source

    Shane Zhou, Research Plant Pathologist, Texas A&M University

    Leaf blast (click on photo to enlarge) has been detected in several varieties including Rex in an experimental rice field located in Jefferson County, Texas.  The disease was as severe as last year with many lesions detected on lower and upper leaves. Affected rice was at the late tillering stage.

    Leaf Blast On Rice. Photo: Texas A&M

    Photo: Texas A&M Leaf Blast On Rice. Photo: Texas A&M

    Lesions of leaf blast were first observed on June 20, apparently resulting from continuous rainy days of June 7 through 10.

    Reemergence of leaf blast in Texas indicates the potential threat of this disease to Texas rice production. In 2012, leaf blast was also detected at this time of the year, which resulted in a severe outbreak of rice blast in Texas. This is the second year of the occurrence of rice blast after many years of absence of this disease in Texas.

    Texas farmers and crop consultants should be watchful for rice blast this year again. Blast is one of the most explosive and damaging diseases in rice, which can completely destroy the crop within a short period of time under most favorable conditions.

    Timely and proper management of rice blast is critical to reducing the damage caused by this disease. The presence of leaf blast in the field is usually the indicator to apply a fungicide for control of this disease.

    Fungicides are available but fungicide timing is very important. Remember:

    • If a single application is made, it should be applied at the heading stage (50 to 70% heads emerging from the boot.
    • If two applications are needed because of severe disease pressure, the first application should be made at boot (2-4 inch panicle) followed by the second application at heading.
    • Trifloxystrobin-containing fungicides (Stratego, 16-19 oz/A; and Gem, 3.1-4.7 oz/A) are most effective.
    • Azoxystrobin-containing fungicides (Quadris, 12-15 oz/A; Quilt, 28‐34 oz/A; and QuiltXcel, 21‐28 oz/A) also are effective.
    • Maintaining a continuous flood is one of the most effective management practices to reduce the damage caused by rice blast.

    Tags: , , , ,

    Leave a Reply

    Name and Email Address are required fields. Your email will not be published or shared with third parties.

    Agfax Rice News

    AFB Rice Close: Mostly Higher with Slight Losses in Sept.8-27

    Louisiana: Rice Farmers Learn Latest on LSU Disease Research8-27

    Farm Groups Release Water Maps to Challenge CWA – DTN8-27

    Southwest May Face ‘Megadrought’ This Century, Say Scientists8-27

    Rough Rice: Stocks Down 13 Percent from August 2013 — USDA8-27

    Keith Good: Net Farm Income Forecast at $113.2B, Down 13.8% from 20138-27

    DTN Fertilizer Trends: Prices Unlikely to See Significant Declines8-26

    AFB Rice Close: Trades Lower withing Yesterday’s Range8-26

    Your Farm Business and the Affordable Care Act8-26

    Texas Crop Weather: Watch for Armyworms in Heading Sorghum8-26

    Keith Good: Farm Incomes, Capital Spending Show Decline in 2nd Quarter8-26

    AFB Rice Close: Futures Post Gains8-25

    Missouri: Corn, Soybeans Making Good Progress — USDA8-25

    Arkansas: Harvest Begins in Limited Areas, Rice Fields Being Drained – USDA8-25

    Texas: Crops Make Good Progress, Harvests Underway in Some Areas – USDA8-25

    Louisiana: Harvest Progresses Despite Rain Delays – USDA8-25

    Arkansas: Rice Research Verification Program Update8-25

    DTN Fertilizer Outlook: Domestic Ammonia Prices Increase8-25

    Environmental Health: Farm-Based Nitrogen Emissions Unavoidable, Can Be Minimized8-25

    Keith Good: Lower Corn Prices Leading to Cuts in Ag-Related Jobs8-25

    Rice Crop: Harvest Progresses in Texas, Louisiana; Arkansas Farmers Unpaid8-22

    Rice Market: Futures Push to New High Before Hit with Selling Pressure8-22

    Arkansas Rice: Harvest Slow Going with Heat and Humidity8-22

    AFB Rice Close: Futures Unchanged to Lower8-22

    Taxes: Donating Crops Can Mean Substantial Tax Savings8-22

    Keith Good: With Midwest Grain Harvest Looming, Storage Concerns Grow8-22

    AFB Rice Close: Futures Give Back Early Week Gains8-21

    Keith Good: Pro Farmer Tour Findings Pressure Corn, Soybean Prices8-21