The application of plant growth regulators in wheat can regulate the growth and development of the plant, which has multiple effects such as controlling the growth and promoting the strength, enhancing the resistance, increasing the grain weight, improving the yield, and benefiting the quality and early maturity.

CCM: For wheat fields with large population and vigorous growth, spraying 0.15 ～ 0.3% CCM solution 50 ～ 75 kg per mu at the early stage of jointing can effectively inhibit the elongation of internodes, make the plant dwarf and the stem base rough and hard, thus preventing lodging; If mixed with 2,4-D butyl ester, it can also control broadleaf weeds in wheat field.

Zootropin: at the jointing stage of wheat, 15~20 ml of Zootropin per mu and 50~60 kg of water are sprayed on the leaf, which can inhibit internode elongation, prevent late lodging, and increase yield by 10~20%.

Petroleum promoter: petroleum promoter is a plant growth stimulant, and its main component is sodium naphthenate. During the period from flowering to filling of wheat, spraying 50 kg of 1000 times of petroleum promoter solution per mu can prevent dry and hot wind, increase the weight of 1000 grains, and increase the average yield by 7.8%.

Naphthylacetic acid: Before wheat filling, spray 50kg of 40ppm naphthylacetic acid solution per mu, which can increase 1000-grain weight.

Fulvic acid: at the booting stage of wheat, 50g of drought resistant agent No. 1 is used per mu, and 2.5~10kg of water is added. After fully dissolved, ultra-low amount of spray can reduce the opening angle of stomata on leaves, improve plant water potential, reduce transpiration intensity, enhance root activity, delay leaf senescence, and increase the average yield by 16.6%.

Gibberellin: spraying 10~50ppm gibberellin solution (40~50kg) per mu at the green stage of wheat can reduce the ineffective tillering at the later stage and improve the earing rate; At the jointing stage of wheat, spraying 40~50 kg of 40 ppm gibberellin solution per mu can increase the number of grains per ear and the weight of 1000 grains.

Uniconazole: Uniconazole is a new and efficient plant growth regulator, and its biological activity is 6-10 times higher than that of paclobutrazol. Applying it on wheat can prevent plant lodging under high density, high fertilizer and water conditions, and can reduce sterile spikelets and increase 1000-grain weight; According to the test, the wheat with uniconazole increased by 15.4% on average compared with the control under the condition of no wind and no lodging. Application method: within one week before wheat jointing, spray 50 kg of 30-40 ppm uniconazole solution per mu.

Plant cytokinin: at the jointing stage or full heading stage of wheat, 50g of plant cytokinin is mixed with 200-300kg of water, and then spray with conventional methods after mixing, which can promote the formation of chlorophyll and protein synthesis, enhance photosynthesis and stress resistance, and is conducive to early maturity and high yield.

Phenoxyacetic acid: During the wheat filling period, spray 60ppm phenoxyacetic acid solution 25kg per mu, which can prevent dry and hot wind and increase the weight of 1000 grains.