Analysis of key natural influences on the occurrence of Chilo suppressalis based on AHP-DEMATEL method

To investigate the key natural factors influencing the occurrence of Chilo suppressalis and their relationships, a systematic analysis was carried out from two perspectives, environmental and biological, using the AHP-DEMATEL method to reveal the weights of each natural factor influencing the occurrence of Chilo suppressalis, as well as the influence relationships and centrality of each natural factor. The findings revealed that, in the criterion layer, environmental factors had a greater impact on the dynamics of Chilo suppressalis occurrence than biological factors. The initial weight of meteorological factors in the factor layer was 0.48, which was the highest initial weight value among all factors, indicating that meteorological factors were the specific key factors influencing the dynamics of Chilo suppressalis occurrence. After correction with the DEMATEL method and combined evaluation with the AHP method, it was discovered that the comprehensive influence degree of all factors except planting area was greater than 0.05, with the meteorological factor having the highest value among all factors, with the comprehensive influence degree of 0.36, indicating that the meteorological factor had the greatest comprehensive influence on the dynamics of Chilo suppressalis occurrence, and the remaining factors having greater comprehensive influence. Finally, this study concluded that more research on specific meteorological factors should be conducted in order to clarify the key meteorological factors influencing the occurrence of Chilo suppressalis.