In the production of agricultural and horticultural crops, damage by pests and the like is still significant, and development of a novel pesticide for agricultural and horticultural use is desired because of the emergence of pests that are resistant to existing chemicals, and the like.Provided, as a solution, are: an oxazepine compound represented by general formula (I) or a salt thereof a pesticide for agricultural and horticultural use, which contains the oxazepine compound or a salt thereof as an active ingredient and a method for using the pesticide for agricultural and horticultural use.(In the formula, R1, R2, R3 and R4 may be the same as or different from each other and each represents a hydrogen atom, a halogen atom, an alkyl group or the like R5 and R6 may be the same as or different from each other and each represents a hydrogen atom or an alkyl group, or alternatively, R5 and R6 represent, together with a carbon atom to which R5 and R6 are bonded, an optionally substituted phenyl group, a pyridyl group or the like R7 represents a hydrogen atom, an alkyl group, an alkynyl group, a cyanoalkyl group, an alkoxyalkyl group or the like Y represents an oxygen atom, S, NH or the like Y1 represents C=O, C=S, a CH2 group or the like A represents a CH group or the like and m represents 0 or 1.)Linvention concerne le domaine de la production de produits agricoles et horticoles, dans lequel les dommages dus aux insectes nuisibles sont encore importants, et dans lequel des découvertes en termes de nouvel insecticide agricole et horticole sont souhaitables en raison notamment de lapparition dinsectes résistants aux produits déjà existants. Dans cet objectif, linvention fournit un composé oxazépine représenté par la formule générale (I) ou des sels de celui-ci, un insecticide agricole et horticole avec ce composé pour matière active et un procédé de mise en œuvre de cet insecticide. [Dans la formule, R1, R2, R3 et R4 peuvent être identiques ou différents, et représentent
