Plant Growth Regulator Is Not A Hormone?

- Jul 30, 2017 -

In recent years, "swelling agent" watermelon, "contraceptive cucumber" and other agricultural products quality and safety events, so that agricultural product quality and safety issues become extremely sensitive. At the same time, some lawless elements hearsay, and even deliberately spread the false quality and safety of agricultural products, "rumors", so that farmers, farmers economic damage, so that the majority of consumers doubts, or even easy to buy.


For the "question" whether the fruits and vegetables on the market really use plant hormones, and the use of plant hormones in the end of the safety of unsafe products such as the issue, Zhejiang Academy of Agricultural Sciences Institute of agricultural quality standards, the Ministry of Agriculture, agricultural product quality and safety expert group Members of the Ministry of Agriculture agricultural product quality and safety risk assessment laboratory (Hangzhou) director Wang Qiang researcher on the functional role of plant growth regulators and agricultural product quality and safety issues were answered.



Plant growth regulators are a class of agricultural inputs that regulate and control plant growth and development. They are classified as one of the four broad categories of pesticides that are managed by artificial or microbial fermentation and also from plants Direct extraction, commonly known as plant hormones.


Hormones are essential in the process of normal growth and development, lack of hormones or hormones are not enough, will directly affect the normal growth and development of organisms. Plant hormones play a role in plants, animal hormones regulate the growth and development of animals, both the role of the target and the mechanism is completely different. Plant growth regulators, also known as plant exogenous hormones, its role with the plant itself to produce plant endogenous hormones the same or similar, but it is completely different from animal hormones, no effect on human growth and development and impact.



Plant growth regulators can promote or inhibit the growth of fruits, leaves, roots, buds, flowers or fruit ripening, preserving fruit or thinning, advance or prolong dormancy, promote fruit growth, Improve the quality, and promote the purpose of maturity, so some agricultural products in the production process need to use plant growth regulator to achieve its best production and nutritional quality performance.


In agricultural production, most crops can rely on their own plant endogenous hormone activity play a role, and through the varieties, cultivation, fertilization, disease prevention and control measures to achieve high yield and high quality objectives, only in a handful of endogenous hormones are not enough to regulate And plant growth regulators are expected to grow and use, so not all agricultural products need to use plant growth regulators.


Plant growth regulators as a high-yield high-quality and efficient agriculture, a technical measure, has been widely used in the world. Including the United States, the European Union, Japan and other developed countries, the current global use of plant growth regulators about 40 kinds, such as ethephon, gibberellic acid, naphthalene acetic acid, indole butyric acid, paclobutrazol, chlormequat, the main application In fruits, vegetables, potatoes, soybeans and other crops. Such as the EU has registered 26 active ingredients and 197 preparation products, allowing these plant growth regulators to be used on crops within the scope of registration.



China has been registered to allow the use of plant growth regulators were 38 kinds of commonly used ethephon, 2,4 - D and gibberellin nearly 10 species, mainly for some fruits, vegetables and other crops.


According to China's "Pesticide Management Regulations", plant growth regulators are in accordance with pesticides to manage. In accordance with the provisions of pesticide management, only to obtain registration and production permit after the production, operation and use. China's plant growth regulator registration requirements are very strict, apply for registration before the need for a large number of tests, from product quality, efficacy, toxicology, residues, environmental impact and other aspects of rigorous review and scientific evaluation, only a variety of tests to prove that it has Good efficacy, safety of people and animals, environment-friendly, before approval of registration.


At the same time, China has developed 12 kinds of plant growth regulators in 47 kinds of agricultural products, food 73 maximum residue limit standard, and plant growth regulator residues included in the agricultural product safety and routine monitoring and risk assessment of the scope of the plant The safety of the growth regulator after use is monitored and tracked to ensure the quality and safety of agricultural products.



Plant growth regulators due to the use of very little, the degradation is fast, the use of both in the flowering and fruit early, from the harvest interval is longer, generally in mature, harvested agricultural products in the residue is very low, even if individual products have Remnants are also minimal. Coupled with the vast majority of crops do not use plant growth regulators, so listed vegetables, fruits, basically no plant growth regulator residue.


From the Ministry of Agriculture on the monitoring of plant growth regulators in agricultural products to assess the situation, the harvest of agricultural products in the residual plant growth regulator samples are only very individual, even if there are individual detection, but the residual value is very low, almost In the state of undetectable, far below the national standard for food safety residue limits. Market monitoring did not find any samples of excessive residue, are in line with national statutory food safety requirements. In the international community, there has been no food safety regulator associated with plant growth regulators.


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