Ammonium nitrogen is relatively stable in a flooded environment and is more usable to young rice seedlings. The timing of the phenoxy herbicide and midseason nitrogen applications can be keyed by the DD50 program or by checking for internode movement. DO NOT apply a phenoxy herbicide after the internode length is more than half an inch. Weed Control Control weeds in rice by using good cultural practices and by effectively using herbicides. The use of good cultural practices such as weed-free planting seed, crop rotations, seedbed preparation, land leveling, levee construction, and water management can help the overall weed control program.
Red rice continues to be a major weed problem in Mississippi.
Refer to Extension Publication 1376, Mississippi Rice Grower's Guide, for red rice control programs. The following table lists weed response to various herbicides. For further recommendations on control of weeds in rice, see Extension Publication 1217, Rice Weed Control. Consult herbicide labels for additional directions and restrictions. The major insect problem for rice is the rice water weevil.