The present invention relates to a pesticide composition for preventing and controlling fusarium head blight, which contains 1 to 150 parts by weight of jinggangmycin and 1 to 20 parts by weight of metconazole per mu. The pesticide composition of the present invention has an obvious synergistic effect when used for preventing and controlling fusarium head blight, and can remarkably enhance the effect of preventing and controlling head blight, increasing the ability of the human being in preventing and controlling head blight of triticeae crops the contamination level of DON toxin in grains is remarkably decreased, dosage, cost, environmental pollution and pesticide residue are reduced, the resistance of wheat pathogenic fungi to metconazole is retarded, and fusarium head blight is prevented and controlled the persistent period of jinggangmycin is prolonged, the frequency of application is decreased, the powdery mildew, rust, leaf blight and sheath blight of triticeae can also be controlled, the labor cost of pesticide application is reduced, the dosage of the chemical pesticide is reduced greatly, and the pesticide composition is environment-friendly.
