News

Just 5 grams of this formulation can eliminate crop pests over thousands of square meters! Let’s take a look at the power of nano‑pesticides.

Category:

Industry Information

Author:

China Pesticide Industry Association

Source:

CCTV.com

Release date:

2022-05-31

In early summer, the lush crops in the fields are just about to reach maturity. Yet in the hidden corners beneath the thriving vegetation, swarms of pests are feasting, threatening the harvest that is on the verge of being reaped. To eliminate these unwelcome intruders, spraying pesticides remains the most effective method.

However, the excessive use of pesticides threatens both the human living environment and food safety. In recent years, Chinese researchers have applied nanotechnology to pesticide production. Can this new generation of pesticides effectively address crop diseases and pests, safeguard the natural ecosystem, and ensure food safety?

 

What is nano-pesticide?

A nanometer is a unit of length, with one nanometer equal to one millionth of a millimeter. If a hair with a diameter of 0.05 millimeters were sliced lengthwise into 50,000 equal parts, each resulting strand would be approximately one nanometer in diameter. When the particle size of a pesticide is reduced to the nanoscale, remarkable phenomena that are invisible at the macroscopic level begin to emerge.

 

Compared with conventional pesticides of the same quality, nano‑pesticides can increase the number of active‑ingredient particles by approximately 2 million-fold and expand their surface area by several hundredfold.
 
In the early days, inorganic pesticides were applied at a rate of roughly one to two kilograms per mu. Subsequently, the development of organochemical synthetic pesticides reduced the application rate to just a few tens of grams per mu. The successful development of nano‑pesticides has cut this even further: today, only 5 to 6 grams per mu are needed—about the amount that fits in a standard mineral water bottle cap.

 

Are nano-pesticides safe?

 

From the very outset of designing nano‑pesticides, researchers prioritized environmental safety and human health. These nano‑pesticides not only exhibit high toxicity against pest insects but also reduce toxicity toward beneficial species, such as the seven‑spotted ladybird, by more than 40%.
 

In China, the regulation of pesticides is even stricter than that of pharmaceuticals. Not only must their effects on humans be assessed, but their impacts on bees, birds, fish, silkworms, and other organisms must also meet stringent requirements.

 

 

The Current Status of Nanopesticides in China

Since the beginning of the 21st century, countries such as the United States and Japan have successively launched research on nano‑pesticides and developed novel pesticide formulations. China’s research on nano‑pesticides started relatively late but has progressed rapidly.

In 2006, Chinese researchers initiated studies on nano‑agrochemicals. In 2014, the first national major scientific research program in the field of nano‑agriculture was launched. After more than a decade of intensive research, China has gradually established a core technological system for the preparation of nano‑agrochemicals that is entirely based on its own intellectual property, giving it a leading edge on the international stage. To date, China has conducted pilot and demonstration trials of nano‑agrochemicals in over 170 counties across 19 provinces and autonomous regions, targeting 20 specific pest and disease control objectives across 17 major crops, including rice, wheat, maize, and citrus.

For more information on nano‑pesticides, tune in to “Sniping Agricultural Pests,” a segment of “Insights into New Technologies.”
 
Click to read the original article and watch the full episode of “Sniping Agricultural Pests.”

 

Source: CCTV.com

 

 

 

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