A method is provided for increasing the number or weight of seeds or fruits of a crop, including a step of treating the crop with effective amounts of a compound represented by Formula (1) and at least one compound selected from the group (A):Group (A): tebuconazole, prothioconazole, cyproconazole, metconazole, boscalid, fluopyram, fluxapyroxad, azoxystrobin, dimoxystrobin, pyraclostrobin, trifloxystrobin, and picoxystrobin.
