Highly toxic pesticides are banned, biological pesticides ushered in spring

  In 2019, 89 kinds of pesticides with restricted use were put on the agenda, and the ban was getting stronger and stronger. At the beginning of the year, methyl bromide was banned, and then glyphosate carcinogenesis was mentioned. Recently, the EU no longer approves the re-assessment application of chlorothalonil, and carbendazim has once again called for ban because of excessive pesticide residues...

  Judging from the recent banned chlorothalonil and carbendazim, these two products are currently ranked in the top ten export products and play a pivotal role in the field of fungicides. No matter how long the future will be banned in the country, we should have some deep understanding of it.

Carbendazim: risk of residual excess

Carbendazim is a systemic fungicide developed by DuPont in the United States in the 1970s. It mainly controls a variety of crop diseases caused by fungi such as deuteromycetes and polycyspores. According to China Pesticide Information Network, up to now, carbendazim has a total of 954 products, including 284 single agents and 670 mixed drugs. In many years of application, carbendazim has the characteristics of sterilization and widespread use, and low cost of use. It is very popular among farmers.

However, in view of the fact that most of the farmers directly engaged in agricultural production in China are not highly educated, in the use of carbendazim, blind drug use, over-range, and over-dosage have occurred, leading to carbendazim being seriously exceeded in some crops.

From the canned case of the orange canned fruit to the rejection of the export of red heart kiwifruit in Cangxi County, Sichuan Province, people are worried about the carbs. At present, Hubei Yi, which mainly produces tea and citrus, has begun to ban the sale and use of carbendazim, and other areas have also banned or restricted carbendazim to varying degrees.

All of the above are vigilant. Domestic growers should be scientific and reasonable when using carbendazim, and operate in strict accordance with the mode of use. There are several misunderstandings that need to be brought to your attention:

In order to solve the problem of carbendazim residue, at present, the Ministry of Agriculture and Rural Affairs has changed from two aspects: First, tracking the international use of carbendazim registration and the change of residue limit standards, strengthening the research, transformation, revision of residue limit standards, and organizing The use of carbendazim, safety risk monitoring and reassessment, timely introduction of regulatory measures such as prohibition; second, some scientific research units and related pesticide manufacturers set up pesticide science and technology innovation alliance to carry out joint research, accelerate the development and screening of bacteria Linger alternative products, early to overcome the technical bottleneck used by carbendazim, completely solve the problem of carbendazim residual harm.

Chlorothalon: Officially banned due to environmental risks in the EU

On April 29, 2019, the European Union issued an announcement not to approve the re-assessment application of chlorothalonil.

This fungicide, which has been used for more than 50 years, is about to reach the end of its life in the European Union. For the reasons for the ban on chlorothalonil, the EU Standing Committee on Plants, Animals, Food and Feed stated that the product has a high environmental risk and is highly risky for fish and amphibians, and that the degradation products of this component may also be harmful to groundwater. Have higher pollution.

Obviously, these reasons are somewhat unconvincing, because the ban on chlorothalonil will cause farmers to lose an important crop protection product, and may also have a huge impact on barley, wheat production and even the beverage industry. For growers, It is not too much to say that it is a disaster to stop chlorothalonil.

In fact, the role of chlorothalonil is also obvious. It has a wide spectrum of sterilization, is not easily washed by rain, has a long potency, and is effective against fungi such as Ascomycetes, Basidiomycetes, Deuteromycetes and Oomycetes. Coupled with its unique mechanism of action, excellent compounding performance and non-resistance characteristics, it is very popular among farmers.

Special reminder is that for oily substances, the use may aggravate the phytotoxicity. It is not advisable to add oil auxiliaries when mixing the medicinal liquids. Be careful when mixing with emulsifiable concentrates.

For the toxicity of chlorothalonil, a large number of studies have found that kidney and mouse epithelial tumors occur after long-term intake of high doses of chlorothalonil in rats and mice. The toxicity to fish and bees is also strong. Therefore, chlorothalonil should be used cautiously in paddy fields. At the same time, repeated exposure to the human body and exposure to chlorothalonil can cause skin disease, which is dangerous for those who do not wear protective clothing.

In the era of blood transfusion, bio-pesticide occupancy increased

The ban of pesticide products in the EU often indicates the fate of these products in the future of the country! It can be foreseen that the trend of upgrading pesticide products is irresistible and the speed is getting faster and faster. It is understood that there are about 650 pesticide varieties in China. In the past two years, due to the limited R&D and innovation capabilities of domestic enterprises, new products often cannot catch up with the number of banned products. Therefore, once some familiar products are banned, they will be banned to farmers. Speaking, it will be a huge loss.

At the same time, the ban on highly toxic pesticides has brought spring to biological pesticides. It is understood that in 2018, there are 17 new varieties of biological pesticides, and the total number of varieties has reached 114, forming bacteria, fungi, Helicoverpa armigera nuclear polyhedrosis virus, natural plants such as Bacillus thuringiensis, Beauveria bassiana. Growth regulators and plant-derived pesticides are the core bio-pesticide R&D production capacity.