Plant growth regulator is a high-efficiency, broad-spectrum, non-toxic plant growth regulator that is recognized as the most active in the world. It uses high-efficiency and safe import auxiliaries and high-purity natural regulators. It has strong penetration and fast internal absorption. Currently, China There are 41 varieties of plant growth regulators registered for registration. The plant growth regulators used for registration have their scope of use and dosage, and should be used properly. The specific situation is as follows:
With the arrival of summer, all kinds of delicious fruits and vegetables have also reached the time of centralized listing. However, while the variety of fruits and vegetables have appeared, the "rumors" about them have emerged endlessly. Among them, the well-known "injection of watermelon" and "sweet cucumber", etc., make consumers worried. In fact, the “expansion agent†and “booster agent†in the mouth of the family are plant growth regulators, which are widely used in agricultural production. Recently, the Journal of the Chinese Journal of Science and Technology interviewed relevant experts to understand the true colors of plant growth regulators.
What is a plant growth regulator? A plant growth regulator is a substance that artificially mimics the chemical structure of a plant hormone or is extracted from a microorganism and has phytohormone activity.
In terms of efficacy, it can be divided into several categories: the first is plant growth promoters, common are gibberellin, naphthaleneacetic acid, brassinolide, ethephon, etc.; the second is plant growth retardant, For example, chlormequat, paclobutrazol, fluridazole, etc.; the third category is plant growth inhibitors, chlorpheniramine, abscisic acid, bud buddan, etc. fall into this category; and one type is preservative.
"For example, jujube trees are generally affected by their biological characteristics and the external environment. The fruit setting rate is very serious, and the fruit setting rate is very low. In this case, adjustment of growth regulators can ensure the good growth of plants. Li Xiangju, a researcher at the Institute of Plant Protection, Chinese Academy of Agricultural Sciences, told the Journal of the Chinese Academy of Sciences.
Researcher Ye Zhihua, former director of the Institute of Agricultural Quality Standards and Testing Technology of the Chinese Academy of Agricultural Sciences, also said that plant growth regulators have similar physiological and biological effects through artificial synthesis and plant hormones after understanding the structure and mechanism of action of natural plant hormones. The substance is used in agricultural production to regulate the growth process of crops, to achieve stable yield increase, improve quality, and enhance crop resistance.
The scope of use and dosage are specified. In fact, plant growth regulators are widely used in agroforestry production in the world. There are more than 100 kinds of varieties that have been commercialized abroad, including vegetables, fruit trees, cotton, tobacco, rice, wheat, and corn. And crops such as soybeans.
Li Xiangju told reporters that there are currently 41 varieties of plant growth regulators registered in China.
According to China's "Pesticide Management Regulations", 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.
In China, the registration requirements for pesticides are very strict, and a large number of tests are required for pesticide products applied for registration. Only after scientific evaluation proves that it has a good control effect, and has control over the health and environmental impacts of humans and animals, and meets the requirements for safeguarding human health and environmental safety before registration can be obtained. 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.
Li Xiangju reminded that in the use of plant growth regulators, it is necessary to pay attention to proper use. “In fact, the plant growth regulators used for registration have their scope of use and dosage.â€
“It’s not that a plant growth regulator is suitable for a wide variety of plants,†explains Li Xiangju. “For example, a plant growth regulator is effective for this plant, but may not work for another plant. And for other plants, it may even have side effects."
For example, the varieties registered in cucumbers in China mainly include thidiazepine, chlorpyrifos, nucleotides, alizarin lactone, sodium nitrophenolate, naphthaleneacetic acid, indole butyric acid, etc., which mainly promote the growth of female flowers. Improve the fruit setting rate and other effects.
In addition, plant growth regulators have provisions for the use of dosages. "If the dosage is more than the allowable range, it will not be able to regulate the growth, but will affect the yield and quality of the plant." Li Xiangju said.
Ye Zhihua also pointed out that plant growth regulators should not be abused. It is safe to use plant growth regulators in accordance with the dosage, period and method of use indicated on the registration approval label. The use of plant growth regulators in this way does not pose a hazard to human health.
"Compared to herbicides, fungicides, pesticides, etc., the amount of plant growth regulators is actually very low." Li Xiangju said.
Experts also said that because plant growth regulators are mainly used in the growth of plants, the amount of residues in mature fruits or marketed products is extremely low, and accurate analytical instruments are needed for accurate quantification.
The famous plant growth regulator 2,4-D: chemical name 2,4-dichlorophenoxyacetic acid, is a white rhombohedral crystal, soluble in most organic solvents such as alcohols, ethers, ketones, etc., almost insoluble water. In practical applications, 2,4-D can be used as a plant growth regulator when it is at a low concentration of 300 ppm or less, and is used to prevent the fall of flowers, fruit, and fruit of tomato, cotton, pineapple, etc., and to be used at a concentration of 500 ppm or more. Stem and leaf treatment can control broadleaf weeds such as alfalfa and alfalfa in the crop fields such as wheat, rice, corn and sugar cane, and grass weeds in the germination stage. It is a selective herbicide . 2,4-D appeared in the 1940s and is the world's first selective herbicide with an important position in the field of herbicides.
Chlorpyrifos: a phenylurea plant growth regulator having cytokinin activity, was invented by Professor Sutoshi of the Pharmacy Department of the University of Tokyo, and researched and developed by Japan Concord Fermentation Co., Ltd. In 1980, under the approval of the Japan Plant Regulator Research Association, in the name of KT-30, Concord Fermentation began a nationwide effect test. Later introduced by China. Widely used in agriculture, horticulture and fruit trees, promote cell division, promote cell expansion, promote fruit hypertrophy, increase yield, mainly used for cucumbers, kiwis, alfalfa, grapes, melons, watermelons and other fruits and vegetables.
Gibberellin: A plant growth regulator that promotes elongation of stems and leaves, increases plant height, and promotes seed germination and plant flowering. It is used in crops such as potato, tomato, rice, wheat, cotton, soybean, tobacco, fruit trees, etc. to promote its growth, germination and flowering results; it can stimulate fruit growth and increase the seed setting rate, and has significant effects on rice, cotton, vegetables, fruits and so on. The effect of increasing production.
Disclaimer: The above pesticide information is extracted from the Internet and has nothing to do with the China Pesticide Network . If there is any infringement, it will be deleted immediately.
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