A kind of micro-chemical substance that naturally regulates and controls the growth and development of plants in plants. It is commonly called phytohormone, also called plant endogenous hormone. The swelling agent and growth added during the growth of vegetables and fruits proposed in the proposal. Hormone is a kind of chemical substance that inhibits and stimulates the growth and development of plants or regulates plant resistance. It includes natural plant hormones extracted from organisms and natural synthetic compounds, all of which are plant growth regulators. Known as plant exogenous hormones. In terms of function, in addition to their functions of swelling and ripening, they also promote rooting and germination, adjust flowering, inhibit growth, and dwarf plants. In terms of management, since 1997, plant growth regulators have been administered as pesticides in accordance with the Regulations on the Administration of Pesticides. Only after obtaining the pesticide registration and handling the production license can it be produced, operated and used. At the time of pesticide registration and approval, the United Nations Food and Agriculture Organization (FAO) and the World Health Organization (WHO) pesticide safety evaluation standards and methods are used for scientific testing and review of the plant growth regulators that are applied for registration, only if it proves to have good efficacy, Registration is only permitted when the human and animal are healthy, safe and environmentally friendly. At present, there are nearly 40 kinds of plant growth regulators registered in China, mainly used in some fruits, vegetables, cotton, wheat and other crops. There are more than 100 types registered internationally, of which more than 40 are allowed in the EU (including ethephon, chlorpyrifos, etc.). Approved plant growth regulators must develop safe use techniques, including the period of use, dosage, method of application, scope of use, precautions, and safety intervals, etc., and clearly marked on the product label to guide farmers in rational use. In addition, the registered products are subject to a series of residue tests, and based on data such as residual tests, residue limits and reasonable use guidelines are established to ensure the quality and safety of agricultural products. In terms of safety, food safety incidents caused by plant growth regulator residues have never occurred internationally. In China, agricultural products that have been administered plant growth regulators are also very safe for consumers. Compared with other pesticides, plant growth regulators are not included in the traditional category of pesticides for controlling insects and weeds. Their products are lowly toxic, and some are classified as having no residue limits even because they are almost non-toxic. Exempted substances. For example, the clopidogrel toxicity (half lethal dose greater than 4918 mg/kg) commonly used for expanded fruits is lower than that of salt (half lethal dose is 3200 mg/kg). In addition, due to the small amount of plant growth regulators, excessive use is prone to adverse effects, and farmers cannot use them in large quantities, so the residue of plant growth regulators is low. Since 2015, the Ministry of Agriculture and Rural Agriculture has carried out a risk assessment of plant growth regulator residues in agricultural products. The results show that the average residual value of plant growth regulators is only 0.001-0.034 mg/kg, the risk of dietary exposure is very low, and product quality and safety are guaranteed. . In terms of the necessity of use, in agricultural production, when plant endogenous hormones are insufficient, plant growth regulators are needed to achieve the purpose of increasing yield, improving quality, extending supply period, and saving labor. For example, bananas are prone to mechanical damage, especially mature bananas are not resistant to storage and transportation. Therefore, green fruit is generally picked for transportation. After reaching the destination, if the green bananas are not fully mature, they can be artificially ripened by ethephon to improve the flavor and taste of the bananas. Sex. Treatment of potatoes with plant growth regulators such as chlorpheniramine inhibits potato sprouting and avoids poisoning by eating germinated potatoes. The use of thiabendazole in the late stage of cotton promotes defoliation and opening of peaches, which can improve quality and facilitate mechanical harvesting and increase production efficiency. Plant growth regulators are an important modern agricultural production resource, but consumers have doubts about “plant hormonesâ€, which leads to consumer confidence. In this regard, the Ministry of Agriculture and Rural Affairs carried out a series of popular science propaganda, wrote a popular science propaganda draft, published a popular science manual, “Be a knowledgeable foodie – take you to know plant growth regulatorsâ€, and produce a popular science micro-video “Contraceptives†cucumber. The truth and the truth of the deformity and hollow strawberry, etc., to guide the sensation. In the next step, the Ministry of Agriculture and Rural Affairs will continue to strengthen popular science propaganda, increase technical training guidance, popularize knowledge of plant growth regulators, raise farmers' awareness of scientific drug use and technical level, and guide the public to rest assured consumption. (micro-pesticide) This article URL: Is plant hormone harmful? 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