Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 223, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2021.112567
Keywords
Oriental fruit fly; Methyl eugenol; DMP; Olfactometer bioassay; Acute toxicity; Cytotoxicity
Categories
Funding
- National Natural Science Foundation of China [32001916, 31800132]
- Nat-ural Science Foundation of Henan Province [202300410135]
- Programs Foundation of Henan University of Science andTechnology [13480065]
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DMP exhibits greater attractiveness to sexually mature males of the Oriental fruit fly than E-CF in laboratory bioassays, with varying responsiveness throughout the day. Toxicological experiments demonstrate that DMP is non-toxic, showing promise as an effective lure for controlling B. dorsalis.
Males of the Oriental fruit fly Bactrocera dorsalis (Hendel) are highly attracted to, and compulsively feed, on methyl eugenol (ME). ME is converted into 2-allyl-4,5-dimethoxyphenol (DMP) and (E)-coniferyl alcohol (E-CF), which are temporarily sequestered in the fly's rectal gland prior to being released at dusk. Previous research initially confirmed that DMP is a relatively strong lure to B. dorsalis males. However, the characteristics of males' response to DMP and toxicology of DMP remains largely unclear. In our study, we demonstrated that DMP was more attractive to sexually mature males than E-CF tested in laboratory bioassays. Interestingly, the responsiveness of mature males to DMP was not uniform throughout the day, eliciting the highest response during the day and dropping to a low level at night. Furthermore, there were no significant differences between the olfactory responses of virgin and mated mature males to DMP. No obvious signs of toxic symptom and deaths were observed in mice during a 14-day acute oral toxicity testing. Further, toxicologically significant changes were not observed in body weight, water intake, food consumption, and absolute and relative organ weights between control and treated groups, implying DMP could be regarded as nontoxic. Lastly, the cytotoxicity data of DMP on cells showed that it exhibited no significant cytotoxicity to normal human and mouse cells. Taken together, results from both the acute and cellular toxicity experiments demonstrated the nontoxic nature of DMP. In conclusion, DMP shows promise as an effective and eco-friendly lure for B. dorsalis males, and may contribute to controlling B. dorsalis in the flied.
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