The influence of caffeine and thymol on the survival, growth and reproduction of Subulina octona (Brugüière, 1789) (Mollusca, Subulinidae)

Ferreira, Pedro Cavalcanti; Soares, Geraldo Luiz Gonçalves; D’ávila, Sthefane; Bessa, Elisabeth Cristina de Almeida

doi:10.1590/s1516-89132009000400018

Cited by 20 publications

(8 citation statements)

References 18 publications

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“…According to these authors, the hatches occur between the first and the 15 th day after the oviposition, with registered mean viability of the eggs (94.8%) for this snail. The average mean of hatching in groups exposed for 48 hours was similar to the means found by Ferreira et al (2009). Those authors tested the ovicidal activity of a caffeine solution at 5 g/L in S. octona and obtained an average hatching of 12.5%.…”

Section: Discussionsupporting

confidence: 80%

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Souza

Silva

Chicarino

et al. 2013

An. Acad. Bras. Ciênc.

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The aim of this study was to establish reference concentrations (LC 50 e LC 90 ) of aqueous extracts of Bidens pilosa on the land snail Subulina octona, in order to assess the changes caused by 24 and 48 h exposure to the sublethal concentration regarding species' fecundity, hatchability and in offspring produced after exposure to confirm the presence of tannins, saponins and flavonoids in this plant species. Eggs newly hatched and 30 day-old snails were exposed to sublethal concentration, calculated for adults. The phytochemical analysis confirmed the presence of flavonoids, condensed tannins and saponins in the aqueous extract of B. pilosa. The LC 50 and LC 90 obtained were 51.4mg/mL and 74.1mg/mL respectively. The exposure to sublethal concentration reduced significantly the hatchability and the survival of the offspring hatched from exposed eggs and also caused a reduction on survival and growth in snails exposed for both time period. The exposure time also caused a reduction at the evaluated parameters.

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Section: Discussionsupporting

confidence: 80%

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Souza

Silva

Chicarino

et al. 2013

An. Acad. Bras. Ciênc.

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“…This monoterpene has already had its insecticide, bactericide, fungicide, and molluscicide potential evidenced by different authors (Imdorf et al 1995;Mansour et al 2000;Ferreira et al 2009), though its acaricide effect was only demonstrated recently for immature of R. (B).microplus (Novelino et al 2007a, b), Rhipicephalus sanguineus (Latrelle 1906) (Acari: Ixodidae) Monteiro et al 2009). Its repellent activity on tick larvae of the bovine was also demonstrated by Novelino et al (2007b).…”

Section: Introductionmentioning

confidence: 98%

Acaricide and ovicide activities of thymol on engorged females and eggs of Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)

et al. 2010

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The present work had the objective of evaluating the influence of different concentrations of thymol on the biological parameters of engorged females of Rhipicephalus (Boophilus) microplus and also its ovicide activity on eggs of this tick. In order to carry out the work, four groups were formed, each containing 20 engorged females, which were immersed for 5 min in different concentrations of thymol (1.0%, 1.5%, and 2.0%) and a control group (water + dimethylsulfoxide). The following biological parameters were observed: initial weight (mg); egg mass weight (mg); pre-oviposition, oviposition, and survival period (days); hatching percentage (%HP); egg production (%EPI) and nutritional (%NI) indexes; and the percentage of control (%C). In order to perform the second stage, thymol solutions were sprayed on the egg masses (50 mg). The parameters' initial weight and pre-oviposition did not present significant differences (p>0.05) among the groups. Thymol caused alterations in the parameters egg mass weight, oviposition, survival period, hatching percentage, EPI, and NI, presenting highly significant differences between the treatments and the control group (p<0.01). The control efficacy was higher than 95% in all the treatments, reaching 99% in the concentration of 2.0%. In the ovicide test, the hatching percentage was not affected in any of the treatments (p>0.05). In the second experiment, when eggs were treated directly, the thymol did not affect significantly this parameter. These results demonstrate that thymol showed deleterious action on most of the analyzed parameters; thus, it is possible to conclude that, in laboratorial conditions, this monoterpene was efficient in the control of engorged females of R. (B.) microplus.

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“…Various articles have described this monoterpene's potential as a bactericide, fungicide, nematicide, molluscicide, insecticide and acaricide against different target species and with different formulations (Imdorf et al 1995;Mansour et al 2000;Tsao and Zhou 2000;Ferreira et al 2009;Pandey et al 2009;Baggio et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Enhancing the acaricide effect of thymol on larvae of the cattle tick Rhipicephalus microplus (Acari: Ixodidae) by solubilization in ethanol

et al. 2011

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The aim of the present work was to propose a new method of solubilizing thymol for use as an acaricide and to evaluate the resulting product's efficacy on Rhipicephalus microplus larvae. Two experiments were performed, both employing the larval packet test to evaluate the potential of the solutions formulated. In the first experiment, R. microplus larvae were exposed to three new formulations: formulation 1-distilled water (70%) + ethanol (30%) + thymol (10.0 mg/ml); formulation 2-distilled water (50%) + ethanol (50%) + thymol (10.0 mg/ml); and formulation 3-distilled water (55%) + ethanol (40%) + DMSO (5%) + thymol (10.0 mg/ml). A control was prepared for each formulation (same formulations except thymol), and another control group was formed where the larvae did not receive any treatment. From the results obtained in the first experiment, the formulation with the best performance and cost-benefit relation was chosen and was tested at concentrations of 2.5, 5.0 and 10.0 mg/ml on larvae of this tick. In the first experiment, the mortality of the groups treated with thymol was greater than 95% for all three formulations, with significant differences (p < 0.05) in comparison with the control groups, where the mortality was under 1%. In the second experiment, formulation 2 was selected because of its better cost-benefit relation, and the mortality rates were 94.0%, 96.5% and 99.9% for the concentrations of 2.5, 5.0 and 10.0 mg/ml, respectively, demonstrating that thymol dissolved in ethanol has high acaricide activity on cattle tick larvae.

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The influence of caffeine and thymol on the survival, growth and reproduction of Subulina octona (Brugüière, 1789) (Mollusca, Subulinidae)

Abstract: ABSTRACT

Cited by 20 publications

References 18 publications

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Preliminary phytochemical screening and molluscicidal activity of the aqueous extract of Bidens pilosa Linné (Asteraceae) in Subulina octona (Mollusca, Subulinidade)

Acaricide and ovicide activities of thymol on engorged females and eggs of Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)

Enhancing the acaricide effect of thymol on larvae of the cattle tick Rhipicephalus microplus (Acari: Ixodidae) by solubilization in ethanol

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