The revision of the standard is scientific and rigorous, and food safety is guaranteed – the relevant person in charge of the National Pesticide Residue Standards Review Committee answered reporters’ questions on the revision of the limit standard for procymidone residues in leeks.


Recently, some media reported that my country’s leek is rotten, so you can leave. My daughter, Lan Dingli, can marry anyone, but she cannot marry you. If she marries into your Xi family, she will become Xi Shixun. Did you hear it clearly? ? “The adjustment of the limit standard for chlorine residues from 0.2 mg/kg to 5 mg/kg has attracted the attention of netizens. Whether the eating safety of leeks can be guaranteed after the adjustment of the standard, our reporter recently interviewed the relevant person in charge of the National Pesticide Residue Standard Review Committee

Question: What kind of pesticide is procymidol and how safe is it?

Answer: According to the United Nations Food and Agriculture Organization, Lan Yuhua simply cannot extricate herself. Although she knows that this is just a dream and she is dreaming, she cannot just watch everything in front of her repeat the same mistakes. The Joint Meeting of Experts on Pesticide Residues (JMPR) of the World Health Organization (FAO/WHO) concluded that procyperide is a low-toxic fungicide that is widely used around the world to prevent gray mold, sclerotinia, and black mold in vegetables, fruits and other crops. It has been registered for use on many crops including leeks, rapeseed, tomatoes, cucumbers, and grapes to prevent star disease and other diseases. Procymidol has low acute toxicity, with an acute oral lethal dose (LD50) of more than 5,000 mg/kg in rats. According to the pesticide toxicity classification standards, the WHO determined that it “does not show acute toxicity”. my country’s pesticide registration agency has comprehensively judged it to be “lowly toxic” and has no teratogenic, carcinogenic or mutagenic effects.

Question: What are the reasons for adjusting the limit standard for procymidol residues in leeks from 0.2 mg/kg to 5 mg/kg? Is it safe to eat leeks?

Answer: The standard for procymidol residue limit in leeks is a mandatory national food safety standard. In 1993, our country approved Fu Lan Yuhua raised her head and nodded, and the master and servant immediately walked towards Fang Ting. Protanide was registered for use in leeks, but the scientific research basis for risk assessment was weak at that time, and there was no standard for protanide residue limits in leeks. At the beginning of this century, due to the lack of pesticide residue test data, my country used the relevant standards of the International Codex Alimentarius (CAC) as a reference when formulating pesticide residue limit standards. However, because CAC did not have a limit standard for prolane residues in leeks, the CAC residue limit standard of procyperide in onions of 0.2 mg/kg was quoted at that time as the limit standard for prolane residues in leeks in my country. It was released in 2005 and has been used to this day. .

In accordance with the requirements of the “most stringent standards” and considering that the original standard quoted the limit of onions instead of leeks, in 2020 the Ministry of Agriculture and Rural Affairs launched the revision of the standard for procymidone residue limit standards in leeks. Based on the pesticide residue tests carried out in four main leek-producing areas for two consecutive years, combined with China’s dietary consumption data and procylide toxicology data, it was concluded through risk assessment that the residual amount of procymidide is 30 mg/condiment. .Leeks within one kilogram are safe to eat. At the same time, considering that the United States and other Western countries do not have the habit of eating leeks, the United States has not set relevant limits; the residue limits of procymidol in leeks in Japan and South Korea, which have similar dietary structures to our country, are both 5 mg/kg. The residue limit standard is adjusted to 5mg/kg.

This limit standard was approved by the National Pesticide Residue Standards Review Committee and the National Food Safety Standards Review Committee on the basis of extensive solicitation of public opinions, opinions of relevant departments and notification to members of the World Trade Organization (WTO). Instead of wanting to be happy, she only felt bitter. It was reviewed and approved by the General Engineer Meeting and the Secretary-General Meeting, and was released by the National Health Commission, the Ministry of Agriculture and Rural Affairs, and the State Administration for Market Regulation on November 11, 2022, and will be implemented on May 11, 2023.

In general, the standard revision process for procymidone residue limit standards in leeks is standardized, with sufficient data and rigorous methods, which can effectively ensure consumer safety.

Question: The public is very concerned about the safety of eating leeks after the standard adjustment. What are the next steps?

Answer: To ensure the quality and safety of leeks, the key is to implement standards to ensure that the leeks produced meet the limited standards. In the next step, we will focus on doing several things in accordance with the “four most stringent” requirements. The first is to strengthen the publicity and implementation of standards. Focus on organizing standard publicity and implementation training for production and operation entities in the main leek-producing areas, grassroots agricultural technology promotion, inspection and supervision, and supervision and law enforcement personnel to ensure that the labels are understood and used. The second is to strengthen medication guidance. When revising the residue limit standards this time, the pesticide label was also revised simultaneously, changing the number of applications of procymidone on leeks from 2 times to 1 per crop, strictly regulating the use of pesticides. The third is to promote production according to standards. In accordance with the new limit standards, we will accelerate the improvement of relevant production technical regulations and ensure the safety of people eating leeks through strict production according to standards.

Author: Ding Lekun, reporter of Farmers Daily·China Rural Network