The Chinese Academy of Agricultural Sciences has overcome major challenges in the prevention and control of crop cyst nematode diseases, achieving results that meet international advanced standards.

Release Date:

2021-01-26

Recently, the project “Integrated Management Technology for Crop Cyst Nematodes,” led by the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences, has made significant progress and passed its acceptance review. The project established 24 experimental sites across 11 provinces nationwide, set up 29 demonstration zones covering over 4.4 million mu, and extended its reach to an additional 21.23 million mu. With a control efficacy of 70%, the initiative has reached an internationally advanced level, generating comprehensive economic benefits of 298 million yuan. It has effectively curbed the rampant damage caused by cyst nematodes in crops such as wheat, soybean, rice, and sugar beet, thereby substantially enhancing China’s overall capacity for integrated management of these pests.

According to Researcher Peng Deliang, cyst nematode diseases in major grain crops such as wheat, soybean, and rice are widespread in China. The annual affected area for wheat cyst nematode disease exceeds 60 million mu, while that for soybean cyst nematode disease is over 30 million mu. With changes in farming practices, including the return of crop residues to the field, the incidence of these diseases has intensified, making them one of the primary constraints on wheat and soybean production.

The Innovative Team for the Epidemiology and Control of Crop Nematode Diseases at the Institute of Plant Protection, in collaboration with 14 domestic research and educational institutions, has addressed the pressing issue of cyst nematode damage to China’s major food crops. With a focus on the broader national food security strategy, after years of sustained research and technological breakthroughs, the team has developed a “Zonal Integrated Management System for Crop Cyst Nematodes.” In response to outbreaks of cyst nematode diseases in potato and sugar beet production, they employed morphological and molecular techniques to identify two major quarantine‑regulated nematodes—Potato Golden Nematode and Sugar Beet Cyst Nematode—for the first time in China, and formulated emergency response protocols that have effectively curbed their spread within the country. Furthermore, the team has pioneered six rapid molecular detection and monitoring methods for early identification of cyst nematodes, providing critical technical support for early warning systems. The team has also screened and selected 37 wheat lines and varieties resistant to cyst nematodes, 252 soybean lines and varieties exhibiting immunity, and 617 highly resistant lines; additionally, they have bred three disease‑resistant soybean cultivars, offering robust technical guidance for the rational deployment of resistant germplasm. Moreover, they have developed five chemical nematicides and four biocontrol formulations, thereby addressing the longstanding shortage of effective nematicidal agents for managing crop cyst nematodes.

Source: AgroPages (World Agrochemical Network)

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