Claim 1: a component for controlling plant growth, characterized by a pyridine compound represented by formula (1), a fluorine atom or a hydrogen atom represented by X, and at least 5-fluorinated compounds selected from group (a) below,1. A group composed of 4-amine-5-fluoro-1-tosiripidine-2 (1H) - ona, 5-fluoro-4-imino-3-methyl-1-tosi-3, 4-dihydropyridin-2 (1H) - ona and 5-fluoro-3-methyl-4 - (methylimino) - 1-tosi-3, 4-dihydropyridyl-2 (1H) - ona. Requirement 4: method of controlling flora, Its characteristic is that it includes every application stage of effective quantity of pyridine compound represented by formula (1), wherein X represents one fluorine atom or hydrogen atom, and at least represents 5-fluorinated compound selected from the next group (a),1. A plant or soil group composed of 4-amine-5-fluoro-1-tosiripidine-2 (1H) - ona, 5-fluoro-4-imino-3-methyl-1-tosi-3, 4-dihydropyridine-2 (1H) - ona and 5-fluoro-3-methyl-4 - (methylimino) - 1-tosi-3, 4-dihydropyridine-2 (1H) - ona. Claim 6: use a pyridan compound represented by formula (1), characterized by X representing a fluorine atom or a hydrogen atom, and at least one 5-fluorinated compound (a) selected from the next group,1. A group composed of 4-amine-5-fluoro-1-tosiripidine-2 (1H) - ona, 5-fluoro-4-imino-3-methyl-1-tosi-3, 4-dihydropyridin-2 (1H) - ona and 5-fluoro-3-methyl-4 - (methylimino) - 1-tosi-3, 4-dihydropyridyl-2 (1H) - ona.Reivindicación 1: Una composición para controlar una fitoenfermedad caracterizada porque comprende un compuesto de piridazina representado por la fórmula (1) en donde X representa un átomo de flúor o un átomo de hidrógeno y al menos un compuesto de 5-fluorouracilo seleccionado del siguiente grupo (A), Grupo (A): un grupo que consiste en 4-amino-5-fluoro-1-tosilpirimidin-2(1H)-ona, 5-fluoro-4-imino-3-metil-1-tosil-3,4-dihidropirimidin-2(1H)-ona y 5-fluoro-3-metil-4-(metilimino)-1-tosil-3,4-dihidropirimidin-2(1H)-ona. Reivindicación 4: Un método para controlar una fitoenferm
