Question:
Which of the following is an entomopathogenic nematode?
Which of the following is an entomopathogenic nematode?
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Two main EPN genera to remember for exams:
1. Steinernema (symbiotic with Xenorhabdus bacteria)
2. Heterorhabditis (symbiotic with Photorhabdus bacteria)
1. Steinernema (symbiotic with Xenorhabdus bacteria)
2. Heterorhabditis (symbiotic with Photorhabdus bacteria)
Updated On: Aug 18, 2026
- Heterorhabditis
- Rhabditis
- Monochoides
- Aphelenchus
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Entomopathogenic Nematodes (EPNs) are beneficial nematodes that infect and kill insects.
They are used as biological control agents in IPM programs targeting soil-dwelling insect pests.
Step 2: Detailed Explanation:
The families Steinernematidae and Heterorhabditidae are the primary EPN groups.
The genus {Heterorhabditis is a well-known entomopathogenic nematode.
It carries symbiotic pathogenic bacteria (Photorhabdus species) in its gut.
When the infective juvenile penetrates an insect host, it releases the bacteria, which multiply and kill the host via septicemia within 48 hours.
Step 3: Final Answer:
The entomopathogenic nematode among the options is Heterorhabditis, which is option (A).
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