2026-05-29
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China has launched its first open source large language model, Green Shield, for better crop protection.
Developed by Nanjing Agricultural University in partnership
with the National Key Laboratory of Agricultural Biosafety and over 30 industry institutions,
the model is designed to offer scientific agricultural guidance and ensure proper pesticide use.
Dong Ximeng, project leader, said that China faces frequent crop pest outbreaks and the issue of pesticide resistance.
Dong, who is also vice dean of the College of Plant Protection at Nanjing Agricultural University,
said that farmers urgently need professional guidance at the grassroots level.
However, general-purpose large-language models often provide inaccurate answers to plant protection questions
and, more critically, give poorly standardized, sometimes risky advice on pesticide use.
To solve the problem, the team built a specialized corpus of over 2.5 billion tokens from academic papers,
patents, national standards, and field reports.
The corpus covers major crops including rice, wheat, soybeans, vegetables, and fruit trees,
and integrates information on pest monitoring, green control measures, and pesticide registration.
Wang Dongbo, a professor at the College of Information Management of Nanjing Agricultural University,
said the model can precisely identify crop types, growth stages, and symptoms of crop diseases.