Question:
Which of the following is a characteristic feature of entomopathogenic nematodes?
Which of the following is a characteristic feature of entomopathogenic nematodes?
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EPNs + Symbiotic bacteria = Effective biological insect control.
Updated On: Jul 2, 2026
- They are obligate plant parasites
- They have a symbiotic relationship with bacteria
- They reproduce only in aquatic environments
- They are vectors of plant viruses
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The Correct Option is B
Approach Solution - 1
Entomopathogenic nematodes (EPNs), such as those in the genera Steinernema and Heterorhabditis, are known for their symbiotic relationship with specific bacteria (Xenorhabdus and Photorhabdus, respectively). These nematodes infect insect hosts and release their symbiotic bacteria, which kill the host and create a suitable environment for nematode reproduction.
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Approach Solution -2
Key Trait Recall: Entomopathogenic nematodes (Steinernema, Heterorhabditis) are famous for ONE defining partnership — a symbiosis with specific bacteria.
They carry Xenorhabdus/Photorhabdus bacteria into insect hosts; the bacteria kill the host and create ideal conditions for the nematode to reproduce — matching option 2.
They are NOT plant parasites (they target insects), don't require water to reproduce, and don't act as virus vectors — those traits belong to different nematode groups entirely.
They carry Xenorhabdus/Photorhabdus bacteria into insect hosts; the bacteria kill the host and create ideal conditions for the nematode to reproduce — matching option 2.
They are NOT plant parasites (they target insects), don't require water to reproduce, and don't act as virus vectors — those traits belong to different nematode groups entirely.
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