Abstract
Chrysomya megacephala (Fabricius, 1794) (Diptera, Calliphoridae) acts as a vector of many disease-causing pathogens. It causes myiasis in human beings and other living vertebrates. In the present study, the effect of a juvenile hormone analog (JHA), fenoxycarb, was evaluated on pupal-adult transformation by exposing pupae (0 and 1-day-old) of blowfly. Pupae were topically treated with different concentrations of the compound, viz., 20, 40, and 80 µg/µl applied on the posterior dorsum with the help of a micropipette. The effects comprised various developmental aberrations, such as delayed pupal-adult ecdysis duration, pupal mortality, formation of pupal-adult intermediates, eclosion failure, reduced adult emergence, and formation of abnormal adults. The freshly molted pupae (0 day) were more susceptible as compared to 1-day-old pupae. Pupal mortality was highest at 80 µg. Normal adult emergence was completely inhibited at day 0 pupae treated with 80 µg of the fenoxycarb. These results demonstrate that fenoxycarb was capable of successfully inhibiting the pupal-adult transformation, and thus, it can be used to control this myiasis-causing agent.
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Abbreviations
- Pti.:
-
Ptilinum
- PHd:
-
Pupal head
- PTh:
-
Pupal thorax
- PPb:
-
Pupal proboscis
- PAb:
-
Pupal abdomen
- ImEPgm:
-
Improper eye pigmentation
- UnEye:
-
Deformed eye
- WriWn:
-
Wrinkled wing
- UnStWn:
-
Unstretched wing
- ImTan:
-
Improper tanning
- ImScl:
-
Improper sclerotization
- UGn:
-
Genitalia undeveloped
- GnS:
-
Genitalia swollen
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Acknowledgements
The author is grateful to the Head, Department of Zoology, University of Allahabad, Prayagraj (India), for providing laboratory facilities. The technical assistance of Dr. Umesh Mehra and Dr. Rakesh Bhasker is gratefully acknowledged.
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Maddheshiya, R. Effect of a novel juvenoid fenoxycarb on the pupal-adult transformation in the blowfly, Chrysomya megacephala (Fabricius, 1794) (Diptera: Calliphoridae). Parasitol Res 120, 2351–2356 (2021). https://doi.org/10.1007/s00436-021-07205-9
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DOI: https://doi.org/10.1007/s00436-021-07205-9