Acaricidal efficacy and chemical study of hexane extracts of the leaves of Neoglaziovia variegata (Bromeliaceae) against the tick Rhipicephalus microplus

The frequent use of acaricides against the tick Rhipicephalus microplus increases the risk of development of resistance. Recent studies have revealed that Neoglaziovia variegata , an indigenous plant species known in Brazil as ‘caroá’, has a deleterious effect against R. microplus . In the current s...

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Published in:Experimental & applied acarology 2021-05, Vol.84 (1), p.263-270
Main Authors: Torres-Santos, Paula T., Farias, Ila F., Almeida, Mainara D., Passos, Gleisiane S., Ribeiro, Luciano A. A., Rolim, Larissa A., Pontes, Michelle C., Almeida, Jackson R. G. S., Horta, Mauricio C.
Format: Article
Language:English
Subjects:
Acaricides
Animal Ecology
Animal Genetics and Genomics
Animal Systematics/Taxonomy/Biogeography
Biomedical and Life Sciences
Column chromatography
Entomology
Hexanes
Indigenous plants
Indigenous species
Leaves
Life Sciences
Neoglaziovia variegata
Plant species
Rhipicephalus microplus
Ticks
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Summary:The frequent use of acaricides against the tick Rhipicephalus microplus increases the risk of development of resistance. Recent studies have revealed that Neoglaziovia variegata , an indigenous plant species known in Brazil as ‘caroá’, has a deleterious effect against R. microplus . In the current study, extracts of N. variegata were studied for their possible acaricidal properties. A hexane extract of N. variegata leaves was fractionated in a chromatography column and the fractions were tested in adult tick immersion tests in triplicate using three concentrations (5, 10 and 25 mg/ml). All the fractions had harmful effects on the ticks. However, three fractions were more efficaceous. Phytochemical analysis indicated that stigmast-5-en-3-ol and stigmastanol were most abundant; they might be responsible for the acaricidal effects, making them potentially useful as alternative agents to control the tick R. microplus .
ISSN:0168-8162
1572-9702
DOI:10.1007/s10493-021-00611-9