End of the era of paraquat

On September 25, 2018, the only registration certificate registered on paraquat sol can be expired in China, which means that the era of paraquat may formally end.

In 2013, Nanjing Red Sun Co., Ltd. obtained an official registration of 20% paraquat sol, valid for 5 years. Nanjing Red Sun Co., Ltd. sol-gel domestic registration certificate will expire on September 25, 2018 (registration number: PD20131912, valid period: September 25, 2013 to September 25, 2018). That is to say, if the product cannot be registered, the production will be stopped on September 25, 2018, but the previously produced paraquat glue can be operated and used within the validity period (2 years), that is, it can be operated and used until 2020. September 25.

Glyphosate, paraquat, glufosinate and diquat are fast, and are the "four kings" in the herbicides . Now that paraquat is withdrawing first, what are the other three?

Glufosinate, the systemic effect is weak, the xylem is not very conductive, and the ammonium is the main contact. Application of glufosinate will kill the leaves first, resulting in inactivation of synthetase activity, inhibition of glutamine synthesis, disturbance of nitrogen metabolism, and accumulation of ammonium ions.

One of the characteristics of the enemy grass is "fast", the contact is the main and the internal suction, can be transmitted upwards, but not to the underground part of the cork, so it is not easy to eliminate the grass roots, resulting in weeds are more likely to appear green .

In contrast, glyphosate is easy to damage the roots of crops, there are various indirect phytotoxics and hidden phytotoxics, and there are strict requirements for safe intervals (15 days or so) for squat crops, and it is easy to cause soil compaction and “deficiency”. "Diabetes" and many other problems, only in the non-cultivated land can show their talents. And due to long-term use, the problem of drug resistance is increasing year by year.

Among the three herbicides, the enemy grass is fast, fast and not stable, and it is not easy to die. Therefore, it is easy to rebound. It is a “rapid” herbicide; glufosinate, medium-speed and stable, can kill grass roots. "Medium-speed" herbicide; glyphosate, stable in internal absorption, slow, can kill grass roots, is a "slow-speed" herbicide.

Regardless of whether the market replaces paraquat with a high dose of glufosinate or a compound with it, due to the high cost, there is always a lack of price.

In this respect, the source of resistance is farmers, or the effect and speed of consumers on paraquat. More specifically, it is cost-effective. The memory is especially deep. It is difficult to accept other products with high prices and no effect like paraquat for a while. . Therefore, the market will gradually recognize and accept new weeding ideas only after the continuous promotion of glyphosate manufacturers and the cost reduction brought about by the progress of production technology.

More pesticide encyclopedia, please pay attention to China Pesticide Network

(Source: Agricultural Resources Guided Pesticide)

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