Tebuconazole 25.9% EC is Tebuconazole 25.9% EC is a systemic fungicide containing 25.9% m.m. Tebuconazole Technical as active ingredient, balance auxillaries and innert material. Tebuconazole 25.9% EC is used as foliar spray for the control of powdery mildew and fruit rot of chilli, tikka and rust of groundnut, blast and sheath blight of rice.