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Encapsulation of carvacrol and thymol with yeast cell wall and its repellent activity against Amblyomma sculptum and Rhipicephalus sanguineus (Sensu Lato)

The main way to avoid contact with ticks and consequently tick-borne disease is the use of synthetic repellents. The search of new repellent compounds to increase the possibilities of use in strategies controls are necessary. The present study evaluated the repellent activity of two natural terpenes...

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Bibliographic Details
Published in:Experimental & applied acarology 2024-04, Vol.92 (3), p.555-565
Main Authors: da Silva Costa, Jhone Robson, do Vale, Tassia Lopes, da Silva, Geovane Ferreira, da Silva, Naylene Carvalho Sales, da Silva Lima, Aldilene, Costa-Junior, Lívio Martins, Luz, Hermes Ribeiro
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Language:English
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Summary:The main way to avoid contact with ticks and consequently tick-borne disease is the use of synthetic repellents. The search of new repellent compounds to increase the possibilities of use in strategies controls are necessary. The present study evaluated the repellent activity of two natural terpenes carvacrol and thymol in each one two different formulation (encapsulated and nonencapsulated with yeast cell wall) against the ticks Amblyomma sculptum and Rhipicephalus sanguineus sensu lato nymphs. Nymphs of A. sculptum and R. sanguineus s.l. of a single generation were used. The vertical filter paper repellency assay were performed with different concentration of both terpenes encapsulated and nonencapsulated in yeast cell wall. The repellent concentration 50% (RC 50 ) were calculated to each compound formulation. Both carvacrol and thymol (encapsulated and nonencapsulated), had a repellent activity against A. sculptum and R. sanguineus s.l nymphs. Amblyomma sculptum was more sensitive to nonencapsulated carvacrol (RC 50 values: 0.0032 to 0.0082 mg/cm 2 after 1 and 15 min) ( P  
ISSN:0168-8162
1572-9702
1572-9702
DOI:10.1007/s10493-023-00896-y