Will plant growth regulators have adverse effects on human health? Many agricultural experts interviewed by the Southern Rural News pointed out that such products are generally used at very low doses on crops and will not cause harm to the quality and safety of agricultural products, but for the current Scattered markets should be strengthened.
Low dose without harm
On the afternoon of May 21, the Guangdong Provincial Department of Agriculture Plant Protection Station invited some experts from South China Agricultural University and the Provincial Academy of Agricultural Sciences to hold a special symposium on the use of plant growth regulators on bananas, cucumbers and watermelons. Experts at the meeting agreed that plant growth regulators, as an important technical measure in crop production, played an important role in increasing agricultural production and increasing efficiency. The promotion and popularization of the use of plant growth regulators should be strengthened, the agricultural producers should be guided to use them scientifically and rationally, and the public should be guided to the scientific public to avoid misleading consumers due to some false information or false news.
It is reported that there are 38 plant growth regulators approved in China, a total of 587 products, involving 280 pesticide manufacturers, the main varieties include sodium nitrophenolate, brassinolide, paclobutrazol, ethephon, chlorpyrifos, Gibberellic acid, naphthalene acetic acid, indole butyric acid, and the like. According to the national registration situation, 42% of the 40% ethephon agent is registered on bananas, mainly used for ripening; 14% of chlorpyrifos soluble liquid agent is registered, mainly registered in cucumber, watermelon, melon, kiwi Crops such as grapes, alfalfa, and navel oranges are used to increase fruit setting, fruit enlargement, and yield increase. According to the statistics of the Provincial Plant Protection Station, Guangdong Province uses about 220 tons of plant growth regulators per year, accounting for only 0.3% of total pesticide sales. The most widely used varieties are paclobutrazol, brassinolide, ethephon, and nitrophenol. Sodium, gibberellin, etc.
Experts at the meeting pointed out that plant growth regulators generally use very low doses on crops and do not pose a hazard to the quality and safety of agricultural products. At the same time, plant growth regulators are very strict in the use of technology. Over-dosage or insufficient dosage is not only difficult to achieve the desired regulation of crop growth, but even affect the normal growth of crops.
Large demand for pesticides
In fact, although experts have rumored, the market prices of related agricultural products are still greatly affected. Many consumers are worried that in the case of extremely low levels of pesticide use, there will inevitably be abuse.
It is understood that according to the "Pesticide Management Regulations", plant growth regulator manufacturers are in the scope of pesticide management. The pesticide registration management system is implemented according to law. All plant growth regulators produced, sold and used in China must be registered with pesticides. When applying for pesticide registration, it is necessary to carry out a number of use effects and safety tests such as efficacy, toxicology, residue and environmental impact, especially in the toxicological test, the acute, chronic, subchronic and teratogenic effects of the applied products. Toxicological tests such as mutagenicity have been thoroughly tested and approved by the National Pesticide Registration Review Committee.
However, some insiders revealed that at the production level, some small enterprises have even scaled up production and sold products without obtaining the corresponding pesticide registration. At the same time, in the retail market, the demand for various plant growth regulators such as swelling agents, redness agents, and sweeteners has become increasingly strong. Many farmers need to use this kind of plant growth hormone to increase production in the process of planting watermelon, kiwi, strawberry and grape. For example, the slogan can be seen on the packaging bags of some swelling agents: 20%-300% of expandable fruits, 10-15 days of early maturity, 0.5-2 degrees of sugar increase, and 20%-30% increase in fruit firmness. Increase the price by 10%-20%. Faced with a bag of swelling agent that sells for only 2-3 yuan, it can achieve such a effect. It is really difficult for farmers to resist "temptation."
Market supervision needs to be strengthened
However, at the regulatory level, the registration of plant growth adjustments by the Ministry of Agriculture means that production is allowed, but there are still no specific standards for the use of such products in China, especially the use of limited assessments. The Southern Rural News reporter inquired about the “Maximum Residue Limits of Pesticide in Food†standard formulated by the Ministry of Health, which found that only 2,4-D, chlormequat, paclobutrazol and ethephon in a few agricultural products such as tomato and cotton. Maximum residue limit indicator.
In fact, many countries have regulations governing the use of plant growth regulators. On the World Health Organization website, the WHO Codex Alimentarius recommends the limits of plant growth regulator residues for different foods and specifies the different residue limits for the five regulators on different foods. Taking chlorpyrifos, the main component of the swelling agent, as an example, Japan, Korea, etc. have clear limits. China's national standards do not have any restrictions on this. In this regard, the experts pointed out that this is determined by the use characteristics of plant growth regulators. In most cases, the amount of use is very low, and it will not affect the human body at all.
However, people in the industry are also worried that because most plant growth regulator manufacturers have small and scattered characteristics, many irregular behaviors such as various ingredients may be added in the production process, and the consequences are difficult to estimate. At the same time, informal small enterprises have almost no guidance on medication knowledge, and the knowledge of operators and users is relatively scarce. The abuse of drugs is naturally inevitable.
In this regard, experts believe that the safe use of plant growth regulators requires a strong supervision of production and distribution.
“In fact, foliar fertilizer will react in many cases, affecting the quality and taste of agricultural products, or to increase the popularization of science popularization.†Xu Hanhong, a professor at the School of Resources and Environment of South China Agricultural University, said that not only must consumers correctly guide, but also increase Great guidance to users of farmers, distributors and other users.
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