Unravelling the physiologic and metabolic action of thiamethoxam on rice plants

We investigated some physiological and biochemical effects promoted by the insecticide thiamethoxam on rice crops. Two experiments were carried under pest-free conditions, in the greenhouse, with thiamethoxam at doses of: 0, 17.5, 35.0, 70.0 and 105.0 g a.i. per 100 kg of seeds. In order we check the physiology, biochemistry and production. In the first experiment thiamethoxam alter the content of photosynthetic pigments, as well as the enzymatic activity of phenylalanine ammonia-lyase, and in the second experiment this molecule modified the root development and nitrate reductase activity in rice plants. We believe that the thiamethoxam has potential to change the primary and secondary metabolism of rice plants, characterizing as a bioactivator.