rầy nâu

Lúa bị rầy nâu tấn công và chuyển màu vàng.

Definition

1. Noun:
   • Brown planthopper: A common name for a small, brown insect pest (Nilaparvata lugens) that primarily feeds on rice plants, often causing significant agricultural damage.
   • Rice pest: Refers specifically to this insect in the context of agriculture, known for sucking sap from rice stems and potentially transmitting viral diseases to the crop.

Usage Examples

• Noun:
  • Rầy nâu là mối đe dọa lớn đối với cây lúa. (The brown planthopper is a major threat to rice plants.)
  • Nông dân đang phun thuốc để diệt rầy nâu. (Farmers are spraying pesticide to eliminate the brown planthoppers.)

Advanced Usage

• The term is used almost exclusively in agricultural and environmental contexts. Severe infestations are often described as "dịch rầy nâu" (brown planthopper outbreak).
  • Vùng này đang đối mặt với một đợt dịch rầy nâu nghiêm trọng. (This region is facing a serious brown planthopper outbreak.)

Variants and Related Words

• Rầy (n): A more general term for planthoppers or leafhoppers.
• Rầy xanh (n): Green leafhopper, another rice pest.
• Nilaparvata lugens (n): The scientific Latin name for the brown planthopper.

Synonyms

• Brown planthopper: The direct English translation and most common term.
• Rice planthopper: A general term that may include similar species.

Related Terms

• Sâu bệnh (n): Pests and diseases (in agriculture).
• Thiên địch (n): Natural enemy (e.g., spiders and wasps that prey on ).