Jhone Robson da Silva Costa, Tassia Lopes do Vale, Geovane Ferreira da Silva, Naylene Carvalho Sales da Silva, Aldilene da Silva Lima, Lívio Martins Costa-Junior, Hermes Ribeiro Luz
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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<sub>50</sub>) 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<sub>50</sub> values: 0.0032 to 0.0082 mg/cm<sup>2</sup> after 1 and 15 min) (P < 0.05), while R. sanguineus s.l. was more sensitive to encapsulated carvacrol (RC<sub>50</sub> values: 0.00008 to 0.0035 mg/cm<sup>2</sup> after 1 and 15 min) (P < 0.05). Among tick species, R. sanguineus s.l. was more sensitive for most compounds than A. sculptum (P < 0.05). Although with distinct repellent activities, carvacrol and thymol encapsulated can be a promising alternative to synthetic repellents against A. sculptum and R. sanguineus s.l.</p>","PeriodicalId":12088,"journal":{"name":"Experimental and Applied Acarology","volume":" ","pages":"555-565"},"PeriodicalIF":1.8000,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Encapsulation of carvacrol and thymol with yeast cell wall and its repellent activity against Amblyomma sculptum and Rhipicephalus sanguineus (Sensu Lato).\",\"authors\":\"Jhone Robson da Silva Costa, Tassia Lopes do Vale, Geovane Ferreira da Silva, Naylene Carvalho Sales da Silva, Aldilene da Silva Lima, Lívio Martins Costa-Junior, Hermes Ribeiro Luz\",\"doi\":\"10.1007/s10493-023-00896-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The main way to avoid contact with ticks and consequently tick-borne disease is the use of synthetic repellents. 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Amblyomma sculptum was more sensitive to nonencapsulated carvacrol (RC<sub>50</sub> values: 0.0032 to 0.0082 mg/cm<sup>2</sup> after 1 and 15 min) (P < 0.05), while R. sanguineus s.l. was more sensitive to encapsulated carvacrol (RC<sub>50</sub> values: 0.00008 to 0.0035 mg/cm<sup>2</sup> after 1 and 15 min) (P < 0.05). Among tick species, R. sanguineus s.l. was more sensitive for most compounds than A. sculptum (P < 0.05). 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引用次数: 0
摘要
避免与蜱虫接触,进而避免蜱虫传播疾病的主要方法是使用合成驱虫剂。有必要寻找新的驱避化合物,以增加用于策略控制的可能性。本研究评估了两种天然萜类化合物香芹酚和百里酚在两种不同配方(酵母细胞壁包裹和非包裹)中对蜱虫Amblyomma sculptum和Rhipicephalus sanguineus sensu lato若虫的驱避活性。使用的是单代 A. sculptum 和 R. sanguineus 的若虫。在酵母细胞壁中包被和不包被不同浓度的萜类化合物,进行垂直滤纸驱避试验。计算了每种化合物配方的驱避浓度 50%(RC50)。香芹酚和百里酚(包囊和非包囊)都对雕蚁和红蚁有驱避活性。雕甲虫对非胶囊化的香芹酚更敏感(1 和 15 分钟后的 RC50 值:0.0032 至 0.0082 毫克/平方厘米)(1 和 15 分钟后的 P50 值:0.00008 至 0.0035 毫克/平方厘米)(P
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 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% (RC50) 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 (RC50 values: 0.0032 to 0.0082 mg/cm2 after 1 and 15 min) (P < 0.05), while R. sanguineus s.l. was more sensitive to encapsulated carvacrol (RC50 values: 0.00008 to 0.0035 mg/cm2 after 1 and 15 min) (P < 0.05). Among tick species, R. sanguineus s.l. was more sensitive for most compounds than A. sculptum (P < 0.05). Although with distinct repellent activities, carvacrol and thymol encapsulated can be a promising alternative to synthetic repellents against A. sculptum and R. sanguineus s.l.
期刊介绍:
Experimental and Applied Acarology publishes peer-reviewed original papers describing advances in basic and applied research on mites and ticks. Coverage encompasses all Acari, including those of environmental, agricultural, medical and veterinary importance, and all the ways in which they interact with other organisms (plants, arthropods and other animals). The subject matter draws upon a wide variety of disciplines, including evolutionary biology, ecology, epidemiology, physiology, biochemistry, toxicology, immunology, genetics, molecular biology and pest management sciences.