Abstract:

The migratory rice pests Nilaparvata lugens, Sogatella furcifera, and Cnaphalocrocis medinalis in Chun'an County occurred at a moderate to high level over multiple years. If not controlled in time, it will seriously affect rice production. Based on the principle of “prevention-first, integrated control”, this study summarized the occurrence characteristics and causes of migratory rice pests in Chun'an County from 2022 to 2024 through field system investigation methods, and put forward corresponding control suggestions. Results demonstrated that rice planthopper (N. lugens and S. furcifera) and C. medinalis infestations reached moderate levels countywide during 2022-2024, with localized severe outbreaks. Besides, the local area has achieved remarkable results in the control of migratory rice pests by combining chemical control with aerial spraying technology, with the controlled area accounting for 96% of the total annual rice planting area. In summary, the occurrence degree of migratory rice pests was influenced by multiple factors such as the current status of local rice cultivation, meteorological conditions, pest resistance, and aerial spraying techniques. Further analysis should be conducted in combination with the data. In addition, in terms of the selection of prevention and control measures, it is suggested to promote the use of plant protection drones to control pests and diseases, and adopt green prevention and control measures such as agricultural, physical and biological ones to replace the use of chemical pesticides, protect the ecological environment, and establish a long-term mechanism for the prevention and control of migratory rice pests.

Key words: Nilaparvata lugens, Sogatella furcifera, Cnaphalocrocis medinalis, occurrence characteristic