My greatest challenge with center pivot rice research in South Africa has been weed control. Since rice is not a normal crop in the country, none of the major rice herbicides such as propanil and quinclorac (Facet) are available here. We are utilizing multiple-crop herbicides already available here (ex. clomazone, pendathalin, 2,4-D) while working with chemical reps to get better herbicides for next year through legal channels. The chemicals that we are using now are effective for controlling weeds at higher rates but often cause significant crop injury. Shortly after I arrive here in early January, the rice was in mid-tiller growth stage with a medium infestation of Wandering Jew and wild watermelons. Later that week, 2,4-D was applied with a sprayer. Unfortunately, less than an hour after the applicator left the field a rain shower occurred. The rice tolerated the 2,4-D well but the many of the weeds recovered because the chemical was washed off. Over the next two weeks, it rained some almost every day. When the weather finally cleared to spray the rice again, the rice stem internodes were beginning to elongate indicating the beginning of reproduction growth stage. In the second application, the 2,4-D killed the weeds but also caused the rice leaves and stems to turn yellow. Hopefully, the plants will recover soon enough to produce normal panicles.