Question

Which of the following fits the classical definition of an entomopathogenic nematode?
(A) Oscheius
(B) Romanomermis
(C) Heterorhabditis
(D) Deladenus
Choose the correct answer from the options given below:

• A. (A), (C) and (D) only
• B. (B), (C) and (D) only
• C. (C) and (D) only
• D. (A) and (C) only

Hint:

EPNs carry symbiotic bacteria (Xenorhabdus/Photorhabdus) that kill insects within 48 hours.

Answer 1

The Correct Option is D

Classical EPNs:
Heterorhabditis (mutualistic with Photorhabdus bacteria)
Steinernema (not listed)
Oscheius:
Emerging EPN with insecticidal potential
Others:
Romanomermis: Parasitic, not mutualistic
Deladenus: Parasitic to insects but not classical EPN