Match List-I with List-II
| List-I | List-II |
|---|---|
| Biocontrol agents | Effective organisms |
| (A) Baculoviruses | (I) Mosquitoes |
| (B) Ladybird beetle | (II) Butterfly caterpillars |
| (C) Bacillus thuringiensis | (III) Arthropods |
| (D) Dragonflies | (IV) Aphids |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) - (III), (B) - (IV), (C) - (II), (D) - (I)
(A) Baculoviruses — this matches (III) Arthropods. Baculoviruses are pathogens that attack insects and other arthropods. This is why they are used as biocontrol agents against insect pests.
(B) Ladybird beetle — this matches (IV) Aphids. Ladybird beetles feed on aphids, which are small sap-sucking pests of plants.
(C) Bacillus thuringiensis — this matches (II) Butterfly caterpillars. The bacterium makes a toxin that kills the caterpillars of butterflies and moths, such as those that eat crop leaves.
(D) Dragonflies — this matches (I) Mosquitoes. Dragonflies are useful in getting rid of mosquitoes.
NCERT Extract:
Microbes as Biocontrol Agents – “… The very familiar beetle with red and black markings – the Ladybird, and Dragonflies are useful to get rid of aphids and mosquitoes, respectively. An example of microbial biocontrol agents that can be introduced in order to control butterfly caterpillars is the bacteria Bacillus thuringiensis (often written as Bt).”
Microbes as Biocontrol Agents – “… Baculoviruses are pathogens that attack insects and other arthropods.”