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 Your email will not be published or shared with third parties.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

    Louisiana Rice: Zinc Identification and Management10-30

    Louisiana Rice: Variety Recommendations for 201510-30

    Louisiana Rice: Herbicide Drift a Past and Future Concern10-30

    AFB Rice Close: Futures Turn Strongly Lower10-30

    Kansas Officials Point Out Flaws in Clean Water Act – DTN10-30

    Ag Secretary Discusses Challenges Facing Future Farmers — DTN10-30

    U.S. Energy: Gas Prices Drop to Lowest Since December 201010-30

    Gasoline Prices: Average Drops 6 Cents10-30

    Propane Stocks: Down 1.3M Barrels10-30

    Diesel Prices: Decrease by 2 Cents10-30

    Keith Good: Drought Impacts California Rice; Farm Land Market Cools10-30

    DTN Fertilizer Outlook: Demand May Fall with Crop Prices10-29

    Arkansas Rice: Plan Early for Disease Management10-29

    Keith Good: Pressure Increases on EPA to Withdraw New Water Rule10-29

    AFB Rice Close: Futures Sharply Lower10-28

    Mississippi Wild Hogs: Trapping Is the Best Control Method10-28

    DTN Fertilizer Trends: Stubborn Prices Pose Dilemma for Grain Farmers10-28

    Keith Good: Corn, Soybean Harvests Advance, Still Behind Average Pace10-28

    AFB Rice Close: Futures Under Pressure10-27

    Missouri: Corn Harvest 68% Complete, Soybeans at 46 — USDA10-27

    AgFax Rice Review: Defense Against Arsenic; Japan’s Modernization10-27

    Group Works to Improve Fertilizer Efficiency — DTN10-27

    Keith Good: GMO Wheat Discovery in Montana Recharges Biotech Issue10-27

    AFB Rice Close: Nearby Contracts Slightly Higher10-24

    Keith Good: EPA’s Water Rule Approved by Internal Review Board10-24

    AFB Rice Close: Sharply Lower Under Heavy Pressure10-23