Effect of Plant Chlormequat and Ethephon on Growth of Cherry Tomato Seedlings

The high temperature and humidity in Hainan can easily cause the excessive growth of cherry tomato seedlings. Plant growth regulators provides a simple, fast and effective way for controlling the excessive growth and culturing strong seedlings. The cherry tomato seedlings were treated with different concentrations of chlormequat and ethephon for analyzing the effects on seedlings growth. The results showed that 400 mg/L 50% chlormequat or800 mg/L 40% ethephon was appropriate spraying concentrations that could significantly inhibit the plant height,increase stem diameter, root-shoot ratio and SOD and POD enzymes activities, which was in accord with the requirements of developing strong seedlings.