Question:
Which one of the following is a pest of Noni, Morinda citrifolia?
Which one of the following is a pest of Noni, Morinda citrifolia?
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The castor semilooper, Achaea janata, is a highly polyphagous caterpillar that regularly causes severe defoliation in Noni (Morinda citrifolia) crops.
Updated On: Aug 7, 2026
- Achaea janata
- Spoladea recurvalis
- Dichocrocis punctiferalis
- Marasmia patnalis
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Noni (Morinda citrifolia) is an important medicinal plant cultivated in tropical regions.
Like other commercial crops, it is host to several insect pests that feed on its foliage, flowers, and fruits, affecting overall biomass and crop health.
Step 2: Detailed Explanation:
Among the options provided, {Achaea janata (commonly known as the castor semilooper) is a significant defoliating pest of Noni.
The larvae of Achaea janata are voracious defoliators that feed extensively on the leaves of Morinda citrifolia, often causing complete defoliation under severe infestation levels.
This insect is a polyphagous pest with a wide host range, including castor, rose, pomegranate, and various wild plants, but it has emerged as a major leaf-eating pest on Noni plantations.
Spoladea recurvalis is primarily a pest of leafy vegetables like amaranthus.
Dichocrocis punctiferalis (shoot and capsule borer) primarily attacks castor, cardamom, and ginger.
Marasmia patnalis is a leaf folder pest of rice.
Therefore, Achaea janata is the correct pest associated with Noni.
Step 3: Final Answer
The correct option is (A).
Noni (Morinda citrifolia) is an important medicinal plant cultivated in tropical regions.
Like other commercial crops, it is host to several insect pests that feed on its foliage, flowers, and fruits, affecting overall biomass and crop health.
Step 2: Detailed Explanation:
Among the options provided, {Achaea janata (commonly known as the castor semilooper) is a significant defoliating pest of Noni.
The larvae of Achaea janata are voracious defoliators that feed extensively on the leaves of Morinda citrifolia, often causing complete defoliation under severe infestation levels.
This insect is a polyphagous pest with a wide host range, including castor, rose, pomegranate, and various wild plants, but it has emerged as a major leaf-eating pest on Noni plantations.
Spoladea recurvalis is primarily a pest of leafy vegetables like amaranthus.
Dichocrocis punctiferalis (shoot and capsule borer) primarily attacks castor, cardamom, and ginger.
Marasmia patnalis is a leaf folder pest of rice.
Therefore, Achaea janata is the correct pest associated with Noni.
Step 3: Final Answer
The correct option is (A).
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