Synthetic auxin treatment for promoting the fruit growth of tomato without pollination sometimes causes puffy fruits. The newly developed cytokinin-like substance, forchlorfenuron (1- (2-chloro-4-pyridyl) -3-phenylurea, CPPU). when applied at anthesis, reduces tomato puffiness of auxin-induced parthenocarpic fruits. Addition of 50300 mg•liter^-1 to an auxin solution did not decrease fruit weight but thickened the peduncle, enlarged columella, and elongated the calyxes beyond those of the control fruits.