What are the risks of 7 high-risk pesticides such as chlorsulfuron?
The Ministry of Agriculture recently issued Announcement No. 2032, which decided to gradually adopt prohibitive management measures for seven high-risk pesticides such as chlorsulfuron and fumei. So what are the risks of these pesticides , and what is the impact after the ban? What alternative products are available? Let's take a look at the following:
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What are the security risks?
"The Ministry of Agriculture issued a ban on seven pesticides such as chlorsulfuron, given that these pesticides pose a high risk to agricultural production safety, agricultural product quality safety and ecological environment safety." Li Wenxing told reporters that chlorsulfuron-methyl Sulfonylurea herbicides such as metsulfuron-methyl and acesulfame-methyl have long-lasting residual effects, require high dosage and use time, and are easy to cause phytotoxicity to the crops. The Ministry of Agriculture was in 2005 and 2006. Two announcements have been issued, and it is proposed to stop accepting and approve new registrations, strict quality requirements, limited use areas, crops and used doses.
Fumei and Fumeijiao are moderately toxic organic bactericides, which have certain harm to producers and users during production and use. After entering the soil, they are easily degraded by microorganisms into inorganic arsenic in the soil. It causes environmental pollution and increased arsenic residues in crops, posing a safety risk to the environment and human and animal health. Therefore, the 10th Plenary Meeting of the National Pesticide Registration Review Committee in 2012 recommended that the registration of Fumei and other preparations be revoked according to procedures.
In addition, although chlorpyrifos and triazophos are moderately toxic organophosphorus pesticides , the results of pesticide residue verification test indicate that chlorpyrifos still has the risk of excessive pesticide residues even if used according to the correct method and dosage; short-term meal based on large share of dietary data As a result of the risk assessment, the use of triazophos on cabbage is unacceptable for children and the general population. At the same time, in recent years, routine monitoring of agricultural product quality and safety found that the use of chlorpyrifos and triazophos easily caused vegetable pesticide residues to exceed the standard. Therefore, in order to better protect the public's life and health and minimize risks, the Ministry of Agriculture decided to gradually ban these two pesticides on vegetables.
What is the impact of the ban?
The seven pesticides used in this ban are relatively conventional pesticide varieties. What is the current production and application? Will the impact of agricultural production and enterprises be affected after the ban?
In this regard, Li Wenxing said that chlorsulfuron, metsulfuron-methyl and methotrexate currently have 43 production enterprises and 98 registered products. In recent years, with the continuous enrichment of alternative products, the output and domestic use area have been gradually reduced. Most of the products are required for export. Chlorpyrifos and triazophos are mainly used in vegetables to control vegetable aphids, diamondback moths, beet armyworms, cabbage caterpillars, etc., and there are many substitute products on vegetables. After the registration is cancelled, the prevention and control of corresponding pests and diseases on vegetables will not be affected. It can also be used for other crops after deregistration, and has little impact on pesticide manufacturers .
Fumei and Fumeijiao are mainly used to control bacterial diseases of apples, wheat and other crops, and the dosage is not large, and the production capacity is also small. At present, 21 products of only 13 production enterprises registered in the effective state have a small market share as a whole, and there are many substitute varieties. The registration of such products is revoked, and there will be no big impact on the agricultural production and pesticide market. influences.
“After special research and expert argumentation, and extensive listening to the opinions of pesticide management, agricultural technology promotion, research institutes and production enterprises, we believe that the time limit for the use of these seven pesticides is ripe. According to the “Pesticide Management Regulations†It is stipulated that after the National Pesticide Registration Committee reviewed, the Ministry of Agriculture made a decision to further prohibit the use of restrictions," Li Wenxing said.
Which alternatives are available?
After these pesticide varieties are banned, which better alternatives can farmers choose?
Li Wenxing told reporters that chlorsulfuron-methyl and metsulfuron-methyl have good control effects on weeds in wheat fields. Ibesulfuron-methyl has good effect on weeds in rape fields, but because of its high activity and long residual period, Non-target crops, especially squat crops, have poor safety. In many places, alternative varieties have been screened and promoted, such as the use of fenoxapropion, isoproturon, clodinafop and fensulfuron in wheat fields, and the use of fluoropyridin in rape fields. Jiaheling, Herbicide, Herbicide, Quinta and other varieties.
There are more alternatives to chlorpyrifos and triazophos in vegetables, such as beta-cypermethrin, Bacillus thuringiensis, avermectin, acetamiprid, flubendiamide, chlorfluazuron and other high-efficiency and low-toxic pesticides.
Fumei is mainly used to control crop diseases such as cucumber powdery mildew, pear black spot disease, and pepper anthracnose. It has many alternative varieties, such as carbendazim and chlorothalonil. According to the China Pesticide Network , some pesticides are used to control apple rot disease. At present, there are 30 pesticide products registered in China to prevent apple rot, such as thiophanate-methyl and octosamine acetate.
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