In fact, plant growth regulators are widely used in agroforestry production in the world. There are more than one hundred kinds of varieties that have been commercialized abroad, and the application range includes vegetables, fruit trees, cotton, tobacco, rice, wheat, corn and 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.
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