sâu năn

Một con sâu năn nhỏ bò trên lá lúa.

Definition

1. Noun:
   • Pachydiplosis oryzae: The scientific name for the "rice gall midge," a small fly whose larvae are a significant pest of rice plants. The larvae feed inside the rice shoot, causing the formation of a tube-like gall called a "silver shoot" or "onion leaf" that prevents the plant from producing a grain head.

Usage Examples

• Noun:
  • Sâu năn là một dịch hại nghiêm trọng đối với cây lúa. (The rice gall midge is a serious pest for rice plants.)
  • Nông dân đang tìm cách phòng trừ sâu năn. (Farmers are finding ways to prevent and control the rice gall midge.)
  • Ruộng lúa này bị nhiễm sâu năn. (This rice field is infested with the rice gall midge.)

Advanced Usage

• The term is primarily used in agricultural and entomological contexts. Damage from this pest is often described as "bạc lá" (silver leaf) or "hành" (onion leaf) due to the appearance of the affected plant.

Variants and Related Words

• Ruồi năn: Another common name for the adult insect, meaning "gall midge fly."
• Bọ năn: A less common regional variant referring to the same insect.
• Dòi năn: Sometimes used to refer specifically to the larval (maggot) stage.

Synonyms

• Rice gall midge: The common English name.
• Pachydiplosis oryzae: The scientific name.

Related Terms and Phrases

• Ống năn / Củ năn: Refers to the gall or deformed tube-like growth on the rice plant caused by the larva.
• Bạc lá lúa: "Silver leaf of rice," describing the symptomatic damage.
• Cây lúa bị hành: "Rice plant turned into an onion," a descriptive phrase for the infested plant's appearance.