Extensive trials indicate that most plant growth regulators have a noticeable effect on the green foliage of plants. Among them, Mepiquat chloride, Chlormequat chloride, and Paclobutrazol are the most effective.

Forchlorfenuron (KT-30) is often used in combination with gibberellin. Trials have shown that spraying Kyoho grape clusters once with a mixture of Forchlorfenuron (KT-30) and gibberellin—10 and 20 days after full bloom—allows seedless berries to grow to the same size as seeded ones, increasing fruit size by up to 50%.

Physicochemical Properties and Identification of Natural Brassinolide,White crystalline powder; melting point 256–258°C; solubility in water 5 mg/kg; readily soluble in organic solvents such as methanol, ethanol, and acetone.

With the modernization of agriculture, herbicides have played a vital and irreplaceable role in controlling farmland weeds and protecting agricultural production.

Mepiquat chloride is used on a wide range of crops, including cotton, wheat, rice, peanuts, corn, potatoes, grapes, vegetables, legumes, and flowers.

When formulating products, customers typically consider the pH levels of fertilizers, which can limit their choice of plant growth regulators. Brassinolide is a novel regulator with a neutral pH, allowing it to be combined with fertilizers and pesticides across the entire pH spectrum—whether acidic or alkaline.

During the process of fruit color change, chlorophyll gradually breaks down and disappears under the action of hydrolases; carotenoid levels increase slightly, while anthocyanins are produced in large quantities and accumulate continuously.

Regarding peach blossom and fruit thinning, spraying Ethephon at a concentration of 200 mg/kg eight days after flowering, or a Naphthylacetic Acid (NAA) solution at 40–60 mg/kg between 20 and 45 days after flowering, has proven effective. Trials on yellow peaches showed that spraying Ethephon at 300 mg/kg during full bloom yielded excellent thinning results.

Key Agricultural Uses of Ethephon
Promotes fruit ripening:It is the most widely used fruit-ripening agent. Applied to crops such as tomatoes, apples, mangoes, and bananas, it accelerates color change and ripening by 1–2 days, facilitating centralized harvesting and long-distance transport.