Question:
The nematode that is an ectoparasite on roots is
The nematode that is an ectoparasite on roots is
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Nematode feeding types:
- Ectoparasite: Criconema, Tylenchorhynchus.
- Endoparasite: Meloidogyne, Heterodera.
- Semi-endoparasite: Rotylenchulus.
- Ectoparasite: Criconema, Tylenchorhynchus.
- Endoparasite: Meloidogyne, Heterodera.
- Semi-endoparasite: Rotylenchulus.
Updated On: Aug 27, 2026
- Nacobbus sp.
- Meloidogyne sp.
- Hirschmaniella sp.
- Criconema sp.
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of nematode feeding habits.
Step 2: Detailed Explanation:
Criconema sp. is an ectoparasitic nematode that feeds on roots externally.
Nacobbus sp. (A): Endoparasite (false root-knot nematode).
Meloidogyne sp. (B): Endoparasite (root-knot nematode).
Hirschmaniella sp. (C): Endoparasite (rice root nematode).
Thus, Criconema sp. is an ectoparasite.
Step 3: Final Answer:
Thus, Criconema sp. is an ectoparasite on roots, which corresponds to option (D).
[0.5cm]
This question tests knowledge of nematode feeding habits.
Step 2: Detailed Explanation:
Criconema sp. is an ectoparasitic nematode that feeds on roots externally.
Nacobbus sp. (A): Endoparasite (false root-knot nematode).
Meloidogyne sp. (B): Endoparasite (root-knot nematode).
Hirschmaniella sp. (C): Endoparasite (rice root nematode).
Thus, Criconema sp. is an ectoparasite.
Step 3: Final Answer:
Thus, Criconema sp. is an ectoparasite on roots, which corresponds to option (D).
[0.5cm]
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