Novel acaricidal and growth-regulating activity of Aloe vera and Rheum rhabarbarum extracts and their oil/water nanoemulsions against the camel tick, Hyalomma dromedarii.

Autor: Radwan IT; Supplementary General Sciences Department, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, 11835, Egypt., Eltaly RI; Zoology and Entomology Department, Faculty of Science, Al-Azhar University, Cairo, 11651, Egypt., Baz MM; Department of Entomology, Faculty of Science, Benha University, Benha, 13518, Egypt., Yousif M; Parasitology Department, Faculty of Veterinary Medicine, Benha University, Benha, 13736, Egypt., Selim A; Department of Animal Medicine (Infectious Diseases), Faculty of Veterinary Medicine, Benha University, Benha, 13736, Egypt., Taie HAA; Plant Biochemistry Department, Agricultural and Biology Research Institute, National Research Center, 33 El-Bohouth St. (Former El-Tahrir St.), Dokki, Cairo, 12622, Egypt., Manaa EA; Animal and Poultry Production, Department of Animal Wealth Development, Faculty of Veterinary Medicine, Benha University, P.O. Box 13736, Toukh, Qalyubia, Egypt., Khater HF; Parasitology Department, Faculty of Veterinary Medicine, Benha University, Benha, 13736, Egypt. hanemkhater1@gmail.com.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Oct 05; Vol. 13 (1), pp. 16802. Date of Electronic Publication: 2023 Oct 05.
DOI: 10.1038/s41598-023-43776-6
Abstrakt: Hyalomma dromedarii is an important tick species infesting livestock. This work evaluated the novel adulticidal, insect growth-regulating, and enzymatic efficacy of ethanol plant extracts of Aloe vera and Rheum rhabarbarum and their nanoemulsions against males and engorged females of the camel tick, H. dromedarii. The physicochemical properties of nanoemulsions were evaluated. The High-Performance Liquid Chromatography (HPLC) analyses indicated that the extracts contained polyphenols and flavonoids, which could enhance their acaricidal effect. Dynamic light scattering (DLS) of the nanoemulsions of A. vera and R. rhabarbarum were 196.7 and 291 nm, whereas their zeta potentials were - 29.1 and - 53.1 mV, respectively. Transmission electron microscope (TEM) indicated that nanoemulsions showed a regular spherical shape (less than 100 nm). Fifteen days post-treatment (PT) with 25%, the mortality% of A. vera and R. rhabarbarum were 88.5 and 96.2%, respectively. Five days PT, the median lethal concentration values of A. vera, R. rhabarbarum, and their nanoemulsions were 7.8, 7.1, 2.8, and 1.02%, respectively, and their toxicity indices were 91.02, 100, 36.4, and 100%, respectively. Their median lethal time values PT with 3.5% were 6.09, 5.09, 1.75, and 1.34 days, respectively. Nanoemulsions enhanced the efficacy of the crude extract 1-7 folds, 5 days PT, and accelerated their speed of killing ticks 2-4 times. The total protein and carbohydrates, Acetylcholinesterase, Alpha esterase, and Amylase were affected PT. The reproductive potential of engorged females was adversely impacted. In conclusion, the novel A. vera and R. rhabarbarum extracts were promising acaricides, and their nanoformulations enhanced their efficacies.
(© 2023. Springer Nature Limited.)
Databáze: MEDLINE
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