Question

Leafhopper which acts as a vector in the transmission of Tungro virus disease of rice is?
A. Sogatella oryzicola
B. Inazuma dorsalis
C. Nilaparvata lugens
D. Nephotettix virescens

Answer 1

Hint: The virus that causes rice tungro disease is a mixture of two viruses that are spread by leafhoppers. Leaf discolouration, slower development, fewer tillers, and sterile or partially filled grains are all symptoms. Tungro infects cultivated rice, wild rice cousins, and other grassy weeds that grow in rice fields.

Complete answer:
A leafhopper is the common term for any Cicadellidae family member. These tiny insects, often known as hoppers, are sap-sucking plant feeders that feed on grass, shrubs, and trees. By feeding on any portion of the diseased plant, even for a short time, leafhoppers can pick up the viruses. It can then transmit the viruses to other plants in as little as 57 days. The viruses do not remain in the body of the leafhopper unless it eats on an infected plant again and re-acquires them.
In South and Southeast Asia, tungro is the most prevalent rice disease. Rice output in Bangladesh, India, Indonesia, Malaysia, the Philippines, and Thailand has been severely harmed since the late 1960s. The green leafhopper, Nephotettix virescens (Distant), and other leafhopper species spread the tungro-associated viruses in a semi-persistent manner.

So the correct answer is option D. Nephotettix virescens.

Tungro infection can affect rice plants at any stage of development. During the vegetative period, it is most common. Plants are particularly vulnerable when they are tillering.

Note:
In South and Southeast Asia, tungro is one of the most debilitating and destructive rice diseases. In severe circumstances, Tungro sensitive types infected at a young stage of growth could lose up to 100 percent of their output. When tungro is found in the field, it quickly spreads to immature rice plants. Leafhopper vectors love immature rice plants to feed on. They're also better at acquiring tungro viruses from younger afflicted plants.