Question

Match List I with List II
List I
A. Odontotermes spp.
B. Nymphula depunctalis
C. Nephotettix spp.
D. Nilaparvata lugens
List II
I. Semi-aquatic
II. Tungro
III. Grassy stunt
IV. Chlorpyriphos
Choose the correct answer from the options given below:

• A. A-IV, B-I, C-II, D-III
• B. A-II, B-III, C-I, D-IV
• C. A-III, B-IV, C-II, D-I
• D. A-III, B-II, C-I, D-IV

Hint:

To remember: Nephotettix is the green leafhopper, which is the vector for Rice Tungro virus. Nilaparvata lugens is the brown planthopper, which is the vector for Grassy Stunt virus.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Insect pests of agricultural crops exhibit diverse habitats, vector capabilities, and chemical control susceptibilities.
Matching these insect species requires integrating knowledge of economic entomology, pest behavior, and chemical management.

Step 2: Detailed Explanation:
Let us analyze each pair carefully to establish the correct matches:
1. Odontotermes spp. (A) represents subterranean termites.
These insects are highly destructive structural and crop pests that feed on cellulose.
Organophosphate insecticides, specifically Chlorpyriphos (IV), are widely recommended as soil drenching agents to control termite infestations.
Thus, A matches with IV.
2. Nymphula depunctalis (B) is the scientific name of the rice caseworm.
The larvae of this pest construct portable cases from cut leaf blades.
These larvae are semi-aquatic (I) and rely on standing water in paddy fields to swim and migrate from one rice plant to another.
Thus, B matches with I.
3. Nephotettix spp. (C) refers to the green leafhopper (GLH) of rice.
It is the principal vector responsible for transmitting the destructive Rice Tungro (II) bacilliform and spherical viruses.
Thus, C matches with II.
4. Nilaparvata lugens (D) is the brown planthopper (BPH) of rice.
BPH is a notorious pest that causes hopper burn and transmits Rice Grassy Stunt (III) virus, which causes severe stunting and excessive tillering in rice.
Thus, D matches with III.
Combining these individual matches yields: A-IV, B-I, C-II, D-III.
This matches Option 1.

Step 3: Final Answer
The correct matching is A-IV, B-I, C-II, D-III.