Academician Zhang Keqin: 40 years to overcome the world's problems in nematode control

Academician Zhang Keqin: 40 years to overcome the world's problems in nematode control

Academician Zhang Keqin: 40 years to overcome the world's problems in nematode control

BEIJING, November 18 Kunming electric (Chen) 18, Chinese Kexue Yuan announced the 2021 Academy of Sciences co-opted a result, Yunnan University professor Zhang Keqin elected Zhong Keyuan life sciences and medicine Faculty Fellow
.

Taking root in the Yunnan-Guizhou Plateau for 40 years, Zhang Keqin has built the world's largest nematode biocontrol microbial resource bank, and has developed high-efficiency nematode biocontrol products with independent intellectual property rights, which has made significant contributions to solving the world's problems in nematode control and the green development of China's agriculture.

Academy of Sciences academician Zhong ASTRI ASTRI academicians

Zhang Keqin graduated from Guizhou Agricultural College majoring in plant protection in 1981, and later stayed at the school
.

Considering that Yunnan is very rich in microbial resources, he came to Yunnan University in 1998 to continue his research

Crop pathogenic nematodes are the second most important crop diseases after fungi.
The global agricultural losses caused by nematodes are as high as more than 170 billion U.
S.
dollars each year
.

The application of large doses of chemical pesticides seriously pollutes the soil and affects food safety.

In the 1980s, Zhang Keqin accidentally discovered in an experiment that there is a class of microorganisms in edible fungi that can eat nematodes
.

"I've only seen insects eat fungus, and this is the first time I have seen fungus eating insects!" Zhang Keqin was very excited.

This kind of "worm-eating bacteria" first secretes aromatic substances that attract nematodes and tricks the nematodes into swallowing them.
After attacking the nematodes, it releases two proteases to act on the nematode's intestinal target proteins to kill the nematodes
.

This process of bacteria infecting nematodes is called the "Trojan horse" mechanism

At the same time, Zhang Keqin led the team to conduct in-depth and systematic research on biocontrol microbial resources from multiple disciplines such as systematic taxonomy, natural product chemistry and chemical biology
.

He isolated and preserved 10355 nematode biocontrol microorganisms from more than 30 provinces across the country

Zhang Keqin has developed China's first nematode bio-pesticide "Nematode Bike" with independent intellectual property rights, realizing the large-scale production and application of the product
.

With self-developed biocontrol products as the core, Zhang Keqin has created a technical system that integrates the release of soil inhibition, initiates the conversion from saprophyte to disease, and mobilizes indigenous nematode-preying fungi and biocontrol agents to coordinate the prevention and control of root-knot nematodes, and has developed a total of 4 A new product for root-knot nematode biocontrol

Since 2017, these products have been used on more than 7.
8 million mu of vegetables, citrus, tobacco, Chinese medicinal materials and other crops in Yunnan, Guizhou, Shandong, Guangxi and other places, with an average control effect of 70% and a reduction of 80% of the use of chemical pesticides.
Increased economic benefits by RMB 3.
296 billion
.

In order to solve the world's problem of nematode biocontrol, it has made an important contribution to the sustainable development of agriculture