Question

Which of the following is the vector of the rice tungro virus?

• A. Nilaparvata lugens
• B. Nephotettix virescens
• C. Sogatella furcifera
• D. Laodelphax striatellus

Hint:

Remember: Nephotettix virescens = Green leafhopper = Rice tungro virus vector.

Answer 1

The Correct Option is B

Rice tungro disease is a significant viral disease affecting rice crops in Asia. It is caused by a combination of two viruses: Rice tungro bacilliform virus (RTBV) and Rice tungro spherical virus (RTSV). The green leafhopper, Nephotettix virescens, is the primary vector transmitting these viruses. The insect acquires the virus by feeding on infected plants and then transmits it to healthy plants during subsequent feedings.

Answer 2

Match the Vector to the Disease: Each rice pest/vector tends to transmit ONE specific disease — learn the pairing, not just the insect.

Nephotettix virescens (green leafhopper) is the known vector of rice tungro virus, acquiring it while feeding on infected plants and spreading it to healthy ones.

Nilaparvata lugens, Sogatella furcifera, and Laodelphax striatellus are all rice pests too, but they transmit DIFFERENT diseases (like grassy stunt or rice black-streaked dwarf), not tungro.