If the commodity tomato is too late to be picked and inconvenient for transport, generally it can be harvested after being matured, because the tomato has a ripening period, but if the temperature does not meet the requirements for lycopene formation, it can not turn red, and many farmers like to use the reminder. Erythromycin or ethephon treatment is an effective measure to promote the early listing of tomatoes, but if not handled properly, not only inhibit plant growth, but also produce phytotoxicity, resulting in excessive tomato hormones, affecting the quality of tomatoes, so pay attention to the following when using pharmaceutical treatment Four points: First, remind red can not be too early. The use of a medicament for redness is best when the fruit is ripe at six. Second, the concentration of the use of agents can not be too strong. When using 40% ethephon, 50 ml of ethephon is mixed with 4 kilograms of water and mixed thoroughly before use. If the concentration of the liquid is too high, it is easy to produce phytotoxicity on the leaves of the base of the plant, so that the leaves turn yellow and affect the photosynthesis. Third, the number of red fruits can not be too much. A plant can stimulate redness at most two to three at a time. If there is too much redness, the pesticide will produce phytotoxicity. Fourth, do not allow the liquid to stick to the leaves. The specific method of use is: firstly mix the liquid with a good shake, dip the liquid with a clean sponge, and apply it on the surface of the fruit that is to be reddish.