Uniconazole is plant growth regulator, such as a GA synthesis inhibitor include height control for antilodging in cereal crops,chemical pruning and height control in fruit trees, plant size control in ornamental species ,and growth control in turf, weeds, vine, shrubs and trees. The secondary physiological effects is used as increasing reproductive growth (flower and fruit set ), and improve plant resistance to environmental stress (e.g.drought, frost and heat ).