Brown Planthopper, Nilaparvata Lugens (Stål, 1854): Biology, Ecology, Outbreak History and Integrated Management in Rice Ecosystems

The brown planthopper (Nilaparvata lugens) is one of the most devastating rice pests in Asia, causing significant yield losses due to direct feeding damage and the transmission of viral diseases. Once considered a minor pest, N. lugens has become a major threat following the expansion of rice cultivation, the introduction of high-yielding varieties, and the excessive use of insecticides. The pest exhibits high reproductive potential, migratory behavior, wing dimorphism, and remarkable adaptability, which contribute to rapid population growth and frequent epidemics. This chapter provides a detailed overview of the brown planthopper, including its taxonomic features, host range, life cycle, ecological distribution, economic threshold levels, damage symptoms, and area-specific economic losses. The focus is placed on management strategies, including legal, physical, mechanical, cultural, biological, botanical, chemical, and microbial approaches, with particular attention to their implementation and dosage. The chapter also highlights the role of insecticide resistance, pest resurgence, and ecosystem disturbances in aggravating planthopper outbreaks, emphasizing the importance of integrated pest management and the conservation of natural enemies. Recent developments in molecular genetics and host plant resistance are discussed as potentially valuable tools for sustainable management. Overall, this chapter synthesizes past and recent research to provide a comprehensive perspective on N. lugens and outlines future directions for environmentally friendly and sustainable control strategies in rice ecosystems.