By Ralph Mazzanti and Ron Baker, Rice Research Verification Program Coordinators
South Arkansas: Seven out of nine southern fields have reached internode elongation. No sheath blight has been detected as of now. Some rice stink bugs lurking around edges and in the fields waiting on heading. Brown spot has occurred in the east side of the Monroe Co. Jupiter field yet plants are healthy and green not indicating K deficiency. In the Arkansas Co. field, symptoms of preflood N streaking are vivid this week. Tissue samples have been taken and sent to the diagnostic lab. The Monroe and Lee Co. fields are struggling to keep water levels sufficient as they are in the reproductive stage. The Lee Co. irrigation well went down and another was diverted to the field. The Lincoln Co. row water field looks good and is progressing normally. The Chicot Co. hybrid field has a thin stand (1.3 plants ft2) on approximately 1/3 of field.
North Arkansas: With one exception, all fields in the program continue developing normally and are tracking well with DD50 predictions. Word has come that rice production in the Randolph Co. field has been terminated for the 2016 season. This decision follows a final assessment of the field’s salvageable profit potential after being submerged by river overflow for weeks. An alternative Randolph Co. field managed under Extension advisory is currently being sought for a possible replacement. In other fields, sheath blight was detected in Jackson Co. Positive stops have remained below the treatment threshold but conditions have remained favorable for the disease requiring close monitoring of the field. Hydrogen Sulfide Toxicity is confirmed in a section of the field in Cross Co. Timely detection and flood management has helped prevent the disorder from becoming severe as indicated by healthy new root growth and a normal response to midseason nitrogen in the field.
See the linked pdf for field-specific information.