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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (33): 119-127.doi: 10.11924/j.issn.1000-6850.casb2022-0943

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Predication of Potential Distribution of Spodoptera frugiperda ( J. E. Smith) in Yunnan Province under Climate Change

YUAN Yulin1(), LV Jianping2, GAO Yixin1, DENG Zhongjian1(), ZHANG Yuan1()   

  1. 1 Faculty of Biodiversity Conservation, Southwest Forestry University/Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Kunming 650224
    2 Yunnan Plant Protection and Quarantine Station, Kunming 650034
  • Received:2022-11-15 Revised:2023-03-18 Online:2023-11-25 Published:2023-11-22

Abstract:

The study will provide scientific reference for agricultural sectors to carry out the prevention and control of Spodoptera frugiperda and policy-making. By systematically collecting the distribution points of S. frugiperda in Yunnan Province, combined with our field survey data, the potential distribution of S. frugiperda in Yunnan province was analyzed with the MaxEnt model and ArcGIS software in combination with current and future climate of CMIP5. The results showed that the AUC value simulated by the model was 0.903, indicating that the MaxEnt model had high accuracy in simulating the potentially suitable area for S. frugiperda. The four most important environmental variables affecting S. frugiperda were average annual temperature, max temperature of the warmest month, altitude, and slope. In the current state, the total suitable area was 271200 km2, accounting for 68.83% of the total area of Yunnan Province. Under the RCP 2.6 and RCP 8.5 scenarios in 2050, the potential total suitable area would expand by 13.92% and 16.35%, respectively. Under RCP 2.6 and RCP 8.5 scenarios in 2070, the suitable area would expand by 16.65% and 16.25%, respectively, compared to the current level. Predictions based on future climate change showed that the potential suitable areas for S. frugiperda in Yunnan Province would be obviously expanded, and there was a trend of spreading to the high latitude and altitude areas. Our results suggest that the climate change may result in the risk of continuous spread and harm increasing. Therefore, more efforts should be made to study and control this invasive agricultural pest, and close attention should be paid to the development of S. frugiperda situation in the severely affected areas and new areas.

Key words: Spodoptera frugiperda, MaxEnt model, climate change, distribution, risk control, Yunnan Province