Estudio preliminar del efecto acaricida de seis extractos metanólicos sobre la arañita bimaculada, Tetranychus urticae Koch

Mercado, Víctor Tello; Chung, Siulan Jacob; Mesina, Robinson Vargas

doi:10.4067/s0718-34292014000200006

Cited by 2 publications

(2 citation statements)

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“…Besides, the toxicity of the extract in this instance occurred through the ingestion of leaves and by contact with the body. Mercado et al (2014) determined the direct-contact toxicity and residual effect of the methanolic extract of six plant species of the families Asteraceae, Solanaceae, Verbenaceae, and Apiaceae on T. urticae, and reported a highly increased mortality level in the treatments that involved a topical + residual effect. The treatment with the Baccharis tola extract (Asteraceae), at 2.5% concentration, resulted in 94% mortality by topical effect, while for the residual contact effect, even at 10% concentration, it caused 23% mortality.…”

Section: Resultsmentioning

confidence: 99%

Bioactivity of the organic extracts of Annona vepretorum on Tetranychus urticae (Acari: Tetranychidae)

Fernandes

Menezes

Souza

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the lethal and sublethal toxicity of hexane and methanolic extracts from the leaves of Annona vepretorum (Annonaceae) on Tetranychus urticae (Acari: Tetranychidae). The methanolic extract toxicity was evaluated by Potter tower application (topical + residual effect) and by immersion of Canavalia ensiformis leaf disks in the extract solution (residual contact effect). The hexane extract toxicity was evaluated exclusively through residual contact effect. Sublethal effects of the methanolic extract were evaluated through LC 50 on the females. Mite preference for feeding and oviposition was evaluated by multiple choice tests, between the control and the extract concentrations, using the hexane and methanolic extracts. Estimated LC 50 for the methanolic extract was 10.96 mg mL -1 for the topic + residual effect and 22.07 mg mL -1 for the residual effect. Estimated LC 50 for the hexane extract was 50.61 mg mL -1. The methanolic extract at the previously estimated CL 50 interfered in the fecundity and longevity of females, differing significantly from the control treatment. In the multiple choice tests, for both extracts, mites showed a significant preference for the control, both for feeding and oviposition. Annona vepretorum has acaricide effect and constitutes a botanical source with great potential for controlling T. urticae.Index terms: acetogenins, botanical acaricide, botanical extracts, integrated pest management, pesticide resistance, two-spotted spider mite. Bioatividade de extratos orgânicos de Annona vepretorumsobre Tetranychus urticae (Acari: Tetranychidae)Resumo -O objetivo deste trabalho foi avaliar a toxicidade letal e subletal dos extratos hexânico e metanólico das folhas de Annona vepretorum (Annonaceae) sobre Tetranychus urticae (Acari: Tetranychidae). A toxicidade do extrato metanólico foi avaliada por meio da aplicação em torre de Potter (efeito tópico + residual) e por imersão de discos de folhas de Canavalia ensiformis na solução do extrato (efeito de contato residual). A toxicidade do extrato hexânico foi avaliada unicamente por meio do efeito de contato residual. Os efeitos subletais do extrato metanólico foram avaliados por meio da CL 50 sobre as fêmeas. A preferência do ácaro por alimentação e oviposição foi avaliada por testes de múltipla escolha, entre o tratamento controle e as concentrações dos extratos, com os extratos hexânico e metanólico. A CL 50 estimada do extrato metanólico foi de 10,96 mg mL -1 para o efeito tópico + residual e de 22,07 mg mL -1 para o efeito residual. A CL 50 estimada para o extrato hexânico foi de 50,61 mg mL -1. O extrato metanólico na CL 50 previamente estimada interferiu na fecundidade e na longevidade das fêmeas e diferiu significativamente do tratamento controle. Nos testes com múltipla escolha, para ambos os extratos, os ácaros apresentaram preferência significativa pelo controle, quanto à alimentação e à oviposição. Annona vepretorum apresenta efeito acaricida e constitui uma fonte botânica de grande po...

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Section: Resultsmentioning

confidence: 99%

Bioactivity of the organic extracts of Annona vepretorum on Tetranychus urticae (Acari: Tetranychidae)

Fernandes

Menezes

Souza

et al. 2017

Pesq. agropec. bras.

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“…These alternative products present a complex mixture of substances whose mechanism of action is still unknown (IRAC, 2009), but which exert a wide range of physiological and behavioral effects on T. urticae (Padín et al, 2007;Afify et al, 2012;Tello et al, 2014). This study aimed to evaluate the effects of alternative treatments under field conditions: (plant extract, mineral oil, entomopathogenic fungus), a chemical control treatment (spiromesifen, abamectin, fenazaquin), an untreated (control treatment) and farmer's practices on populations of the phytophagous mite T. urticae in a papaya crop.…”

Section: Introductionmentioning

confidence: 99%

Management alternatives for Tetranychus urticae Koch (Acari: Tetranychidae) in the Carica papaya L. Hybrid Tainung-1

Herrera-Palacios

Mena

Cobo

2018

Rev. Colomb. Cienc. Hortic.

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The mite Tetranychus urticae is a key pest in papaya crop in Valle del Cauca (Colombia), and it has been generally controlled with chemical products; other management alternatives have not been used. Therefore, this study aimed to evaluate the effects of alternatives: plant extract (garlic-chili vegetable extract, Alisin®), mineral oil (vegetable fatty acid complex, Adimel®), entomopathogenic fungus (Successor®), chemical control (spiromesifen, abamectin, fenazaquin), untreated (control treatment) and farmer’s practices (14 applications of pesticides) in a randomized complete block design with three replications/treatment in a Hybrid Tainung-1 papaya crop in the municipality of Roldanillo. The sampling was done every 8 days by measuring the variables: number of leaves/plant, number of infested leaves/plant, number of floral structures/plant, number of fruits/plant, diameter of stem/plant (every 30 days), population of T. urticae/leaf and yield. It was found that the populations of T. urticae/leaf were low in entomopathogenic fungus (11.978) and chemical control (10.548), with no significant differences (P>0.05) from farmer’s practices (3.339). In contrast, the mite populations were very high in plant extract (22.086), mineral oil (20.411) and untreated (35.746), as compared to farmer’s practices. There was a significant difference in all treatments for the variable infestation from farmer’s practices, and the number of leaves/plant in mineral oil and untreated treatment was significantly different from farmer’s practices. No significant differences were found between the treatments in the rest of the evaluated variables. The entomopathogenic fungus turned out to be the best alternative for a management program of T. urticae in papaya in this region.

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Estudio preliminar del efecto acaricida de seis extractos metanólicos sobre la arañita bimaculada, Tetranychus urticae Koch

Abstract: Estudio preliminar del efecto acaricida de seis extractos metanólicos sobre la arañita bimaculada, Tetranychus urticae Koch

Cited by 2 publications

References 16 publications

Bioactivity of the organic extracts of Annona vepretorum on Tetranychus urticae (Acari: Tetranychidae)

Bioactivity of the organic extracts of Annona vepretorum on Tetranychus urticae (Acari: Tetranychidae)

Management alternatives for Tetranychus urticae Koch (Acari: Tetranychidae) in the Carica papaya L. Hybrid Tainung-1

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