The invention relates to a water based spraying liquid suitable for spraying plants, wherein the liquid comprises water and a suitable amount of a growth regulator chosen from the group consisting of prohexadione and trinexapac-ethyl, and a fungicide chosen from the group of prothioconazole, metconazole, difenoconazole, paclobutrazole, triconazole, tebuconazole, azoxystrobin, picoxystrobin, boscalid and penthiopyrad, wherein the amount of growth regulator is between 20 and 400 g per hectare and wherein the amount of fungicide is between 20 and 500 g/ha. Preferably, the growth regulator is prohexadione-calcium, and the fungicide is prothioconazole.
