Abstract:

To enable efficient and accurate prediction and control of soybean pests and diseases, guide soybean production, and optimize industrial layout, this study utilized meteorological observation data and soybean pod borer occurrence area data (2008-2022) of Hulunbuir City. By applying a climatic suitability index evaluation method, the annual suitability indices for soybean pod borer occurrence over the past 15 years were calculated. A climatic suitability evaluation grading system for the pod borer was established, and GIS-based climatic risk zoning of soybean pod borer occurrence in Hulunbuir City was conducted. The results indicate that climatic suitability indices (F) can be categorized as follows: F> 2.0 indicates an extremely high occurrence area; 1.5 < F≤2.0, a high occurrence area; 1.0 <F≤1.5, a moderate occurrence area; and F≤1.0, a low occurrence area. In northeastern Inner Mongolia, soybean pod borer occurrences are primarily distributed in the southeastern and western foothills of the Greater Khingan Mountains, predominantly categorized as high- and moderate-risk zones. The ridge and northern forested areas of the Greater Khingan Mountains exhibit low occurrence risk, with no extremely high-risk zones identified across the city. High-risk areas require increased investment in biological and chemical control measures to minimize major pest outbreaks and promote sustainable soybean production in the region.

Key words: northeastern Inner Mongolia, soybean pod borer, meteorological indicators, climate risk, classification, zoning research, regional assessment