Comparative studies on the competition between red rice and cultivated riceThe present study was conducted in greenhouse, in order to evaluate the competition between red rice and the cultivar IAC-435. The effect of competition was measured on the root and aerial development (tillering, height of plants and fertility of panicles). The principal effects of competition were observed in the weight of root development and number of tillers of the cultivated rice IAC-435, that suffered great reduction in account of concurrence determined by the red rice.