Also known as "CCC", the commercially available dosage form is 50% chlormequat water, which is an antagonist of gibberellin. It can enter the plant body through leaves, young shoots, buds, roots and seeds, inhibit the biosynthesis of gibberellin in the plant body, control plant growth, promote reproductive growth, shorten plant internodes, grow strong, develop roots, resist lodging, deepen leaf color, thicken leaves, increase chlorophyllin content, enhance photosynthesis, improve crop resistance, improve quality and increase yield.

Application of chlormequat in vegetable production:

1、 Tomatoes are generally sprayed with 50% of the total chlormequat solution diluted with 2000-2500 times of water to 200-250mg/kg of chlormequat solution from 3-4 leaves to 1 week before planting. If the seedling is small and the overgrowth degree is slight, use a spray to evenly spray, so that the surface of the leaves and stems of the seedling is completely and evenly covered with fine droplets without flowing; When the seedlings are large and the degree of overgrowth is heavy, they can be sprayed or watered with a watering can, using 1kG diluent per square meter. Pay attention to the uniform application of drugs to prevent excessive local areas from causing drug damage.

2、 For pepper plants with the trend of leggy growth, they can be sprayed with chlormequat at the concentration of 20-25mg/kg at the initial flowering stage to inhibit the growth of stems and leaves, make the plants dwarf and strong, and the leaves are dark green, and enhance the ability of cold and drought resistance. Spray with 100-125mg/kg chlormequat solution at flowering stage can promote early maturity and increase production of strong seedlings.

3、 The application of 100-125mg/kg chlormequat solution spray at the flowering stage of eggplant can promote early maturity and increase production.

4、 Summer Lettuce Summer Lettuce Spraying 500 mg/kg of chlormequat solution once or twice at seedling stage can effectively prevent the seedlings from growing; Spraying chlormequat at the beginning of the rosette stage can also prevent overgrowth and promote the expansion of young stems. The application method is 7-10 days once, a total of 2-3 times, and the application concentration is 350mg/kg. Preparation method: 10 mL/bottle of 50% aqueous solution is sold on the market. Each bottle is 500 mg/kg for 10 kg of water, and 350 mg/kg for 15 kg of water.

5、 The potato was sprayed with 40% chlormequat twice at the bud stage and early flowering stage. The concentration of 0.2% can significantly increase the number of large potatoes, shorten the plant, improve the commercial quality, and increase the yield and value.

6、 Other vegetables used for carrots, Chinese cabbage and celery can inhibit bolting and can be sprayed before bolting with a concentration of 4000-8000mg/kg. The use effect of chlormequat is related to the temperature. 18-25 ℃ is the applicable temperature of the drug, so it is advisable to apply the drug early, late or in overcast days. After the application, ventilation is prohibited. The cooling bed needs to be covered with window frames, and the plastic shed must be closed with a small shed or doors and windows, so as to improve the air temperature and promote the absorption of the drug. Do not water within 1 day after application to avoid reducing the efficacy. When applying medicine at noon, because of the strong sunshine, high temperature, fast evaporation of water, and the time to absorb the liquid medicine, it is easy to cause drug damage, so it cannot be used. If the seedlings do not appear to be overgrown, try not to use chlormequat treatment. Even if the seedlings are overgrown, the number of times should not exceed 2.