Growth of Tomato Plants as Affected by Transplanting Treatments with New Plant Regulators*

1. No stimulation on growth occured with 1-naphthoic, 6 quinoline carboxy- lic and l-hydroxy_:2-naphthoie acids when the seedlings were soaked for 16 hours before transplanting, but were injured at higher concentrations. However, when these chemicals were applied through the media of paper and peat moss, vine growth was stimulated except in the plants treated with l-hydroxy-2-naphthoic acid.

2. Tomato plant roots treated with 50 ppm. of 4’, 4’-methylenebis-3 hydroxy-2-naphthoic acid through the media of paper and peat moss and transplanted in the open field, exhibited greater fresh weight of vines as compared to control.