With regard to the recent issue of plant growth regulators that the media and consumers are concerned about, the Ministry of Agriculture’s Press Office issued a press-to-report today to give the public a scientific understanding. In response to a reporter's question, Prof. Ye Zhihua, director of the Institute of Agricultural Quality Standards and Testing Technology of the Chinese Academy of Agricultural Sciences, said that plant growth regulators are low-toxic products. According to the Regulations on Pesticide Management, plant growth regulators are pesticides. In the scope of management, only plant growth regulator products that have obtained pesticide registration and obtained production licenses can be produced, operated and used. Reporter: Recently, some media reported that the top flower barbed cucumber is a plant growth regulator "powder", what is a plant growth regulator? How many kinds of plant growth regulators are there? How is the usage? A: Plant growth regulators are a class of substances used to regulate plant growth and development. Plant growth regulators, also known as plant exogenous hormones, are generally produced by artificial synthesis or microbial fermentation, and their physiological and biological effects are the same or similar to natural plant hormones (a class of compounds naturally occurring in plants). At present, plant growth regulators are widely used in agroforestry production in the world. There are more than 100 varieties that have been commercialized abroad, mainly including ethephon, mepazine, chlormequat, thiabendazole, gibberellic acid, etc. The range includes crops such as vegetables, fruit trees, cotton, tobacco, rice, wheat, corn and soybeans. There are 38 varieties of plant growth regulators registered in China, and nearly 10 varieties such as ethephon and gibberellic acid are commonly used, mainly used in horticulture, rice, cotton and Other crops. China's varieties registered on cucumber include thiabendazole, chlorpyrifos, nucleotides, alizarin lactone, sodium nitrophenolate, naphthaleneacetic acid, indolebutyric acid, etc. The main function is to promote the growth of female flowers. Increase the fruit setting rate. Plant growth regulators are a less toxic type of product and are safe if used in accordance with the methods of use and precautions indicated on the national registration approval label. The use of plant growth regulators can not only ensure the stable production of crops, improve the quality of agricultural products, but also enhance the stress resistance of crops, so that agricultural production saves labor, saves time and costs. Reporter: What are the regulations for the use of plant growth regulators in the country? A: According to the “Pesticide Management Regulationsâ€, plant growth regulators are within the scope of pesticide management. Only plant growth regulator products that have obtained pesticide registration and obtained production licenses can be produced, operated and used. China has strict requirements on pesticide registration. A large number of tests are required for pesticide products applied for registration. Strict examination and scientific evaluation are carried out in terms of product chemistry, efficacy, toxicology, residues, environmental impact, etc. Good control effect, at the same time control the human and animal health and environmental impact, in line with the requirements of human health and environmental safety, in order to obtain registration. For the production and operation of pesticides, it is necessary to attach a label approved by the relevant department, and clarify the effective ingredients, methods of use and precautions. The use of plant growth regulators should be strictly in accordance with the dosage, period of use and method of use indicated on the label, and should not be abused. Reporter: What is plant hormone? Will melons ripened with hormones be harmful to humans? A: Phytohormone refers to a trace amount of organic substances that are naturally occurring in plants and have a significant effect on plant growth and development. They are also called plant natural hormones or plant endogenous hormones. Its existence can affect and effectively regulate the growth and development of plants, including cell growth and division, to rooting, germination, flowering, fruiting, maturity and shedding. Plant growth regulators are substances that have similar physiological and biological effects by artificial synthesis and phytohormone after understanding the structure and mechanism of action of natural plant hormones. They are used in agricultural production to effectively regulate the growth process of crops and achieve stable yield increase. Improve quality and enhance crop resistance. The use of plant growth regulators does not pose a hazard to human health in accordance with the dosage, period and method of use indicated on the registration approval label. If there is irregularity in use, it may cause the crop to grow too fast, which will have certain effects on the quality and taste of the agricultural products, but will not cause harm to human health. Reporter: Can existing agricultural product quality and safety supervision methods detect the use of plant hormones? A: Plant hormones are divided into endogenous hormones and exogenous hormones. Only exogenous hormones (plant growth regulators) have detection problems. Plant growth regulators approved by the state have corresponding detection methods. The existing agricultural product quality safety supervision and professional testing institutions have the ability to detect plant growth regulators in agricultural products, and can accurately detect whether plant growth regulators are used. It is necessary to point out that plant growth regulators are mainly Auxiliary use during plant growth, generally in the mature fruit or listed products, the amount of residue is extremely low, accurate analysis is required using sophisticated analytical instruments. Washer
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Plant growth regulators must be registered for pesticide use in production and use.