Avaliação da toxicidade aguda (DL50 e CL50) de inseticidas para Scaptotrigona tubiba (Smith) (Hymenoptera: Apidae): via de contato

Moraes, Simone Souza de; Bautista, Ana Rita Pedreira Lapa; Viana, Blandina Felipe

doi:10.1590/s0301-80592000000100004

Cited by 27 publications

(22 citation statements)

References 10 publications

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“…The calculated LD 50 for the Western honey bee to permethrin, diazinon, and methomyl were 0.159, 0.372, and 1.29 g per bee, respectively (Atkins et al 1981), which are signiÞ-cantly higher than the lethal doses that we found for the same chemicals on the three studied stingless bees. Our results and the Þndings by Moraes et al (2000) in Scaptotrigona tubiba (Smith) indicate that stingless bees are highly susceptible to some pesticides. Nevertheless, it is reported that species such as Scapto- The values of the chi-square test for each slope (b) are presented as well as the PearsonÕs correlations between wt and LD 50 .…”

Section: Discussionsupporting

confidence: 61%

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Comparative Toxicity of Pesticides to Stingless Bees (Hymenoptera: Apidae: Meliponini)

Valdovinos-Nuñez

Quezada‐Euán²,

Ancona-Xiu³

et al. 2009

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Stingless bees are potential pollinators of commercial tropical crops and their use may increase in the short term. However, studies comparing the toxicity of pesticides to different individuals and species are lacking, making it difficult to evaluate their short- and long-term effects on colonies and populations of these insects. In this work, we tested the lethality of compounds from the main pesticide groups on stingless bees of the species Melipona beecheii Bennett, Trigona nigra Provancher, and Nannotrigona perilampoides Cresson. The LDo (in micrograms per bee) for each pesticide was calculated for callow workers and foragers of the three species as well as for gynes and drones of M. beecheii. The results showed that all species were highly susceptible to the evaluated compounds. Nicotinoid pesticides were the most toxic, followed in descending order by permethrin, diazinon, and methomyl. We found evidence of a relationship between the body weight of the species and their LD50 for permethrin and methomyl (r = 0.91 and 0.90, respectively) but not for diazinon (r = -0.089). An analysis of contingency tables showed that within each species, callow workers had higher mortalities than foragers (P < 0.01). In M. beecheii at similar pesticide dose more males died compared with females [chi2((0.0),1) = 10.16]. However, gynes were less resistant than workers [chi2((0.01),1)) = 8.11]. The potential negative consequences of pesticides to native stingless bees are discussed considering the reproductive biology of these insects. It is important to take actions to prevent damage to these key species for the ecology and agriculture of Mexico and Latin America

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Section: Discussionsupporting

confidence: 61%

“…Pioneering studies in Brazil have evidenced the toxicity of insecticides to workers of stingless bees (Malaspina and Stort 1983, Macieira and Hebling-Beraldo 1989, Moraes et al 2000. However, comparison between species has not been conducted and the role of factors such as age and size in relation to the relative resistance remains unclear.…”

mentioning

confidence: 99%

Comparative Toxicity of Pesticides to Stingless Bees (Hymenoptera: Apidae: Meliponini)

Valdovinos-Nuñez

Quezada‐Euán²,

Ancona-Xiu³

et al. 2009

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“…Most studies on the effects of pesticides on bees have evaluated the adult stage (Moraes et al 2000), mainly using the species Apis mellifera as a study model (Cresswell 2011;Costa et al 2014;Fairbrother et al 2014). Studies on the exposure of bees during the larval stage through in vitro rearing tests also focus on this species (Aupinel et al 2007;Hendriksma et al 2011;Wilkins et al 2013;Tavares et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

et al. 2016

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-In Brazil, where the use of neonicotinoids is allowed in bee-attracting flowering crops, we investigated whether thiamethoxam intake during the larval stage of the native bee species Scaptotrigona aff. depilis affects the survival and development by exposing larvae to contaminated food. Our results indicated that the larvae exposed to the dose at a field-realistic level and to the doses ranging around it had their survival rates significantly impaired. At the highest doses, we observed larvae and pupae with shorter and longer development times, respectively, and the formation of smaller and asymmetric specimens. Evidently, we need to consider that thiamethoxam reaches the pollen and nectar at residual levels, and that they are processed by nurse bees before destined for offspring. Nevertheless, our findings suggest a warning, since the individuals had their biological parameters affected by thiamethoxam, when exposed to doses at field-realistic levels.larval food / in vitro rearing / adverse effects / developmental stage / insecticides

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“…Estudos comparativos sobre a suscetibilidade de espécies da fauna brasileira evidenciaram a alta toxicidade de diferentes ingredientes ativos para esse grupo de espécies: permetrina, heptacloro, dieldrina, cipermetrina, endossulfam, malationa, acetato, carbaril e fenvalerato para Trigona spinipes (Macieira & Hebling-Beraldo, 1989); deltametrina, triclorfom e malationa para Scaptotrigona tubiba (Moraes et al, 2000); deltametrina e metamidofós para Melipona quadrifasciata (Del Sarto et al, 2014), imidacloprido para Melipona scutellaris (Costa et al, 2015) e Scaptotrigona postica ; fipronil para M. scutellaris (Lourenço et al, 2012a(Lourenço et al, , 2012b e S. postica (Jacob et al, 2013). Muitos desses ingredientes ativos, durante sua rota metabólica, afetam diferentes processos celulares que impactam a longevidade, o comportamento e a fisiologia do inseto, e podem causar efeitos individuais e consequências para a colônia ao longo do tempo.…”

Section: O Uso De Agrotóxicos Na Agriculturaunclassified

Enfraquecimento e perda de colônias de abelhas no Brasil: há casos de CCD?

Pires

Pereira

Lopes

et al. 2016

Pesq. agropec. bras.

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Resumo -Nas últimas décadas, o declínio de populações de abelhas silvestres e o colapso de colônias de Apis mellifera têm preocupado pesquisadores e apicultores. O objetivo deste artigo de revisão foi compilar alguns dos estudos mais relevantes relacionados às possíveis causas desses problemas -como nutrição, manejo, patógenos, parasitas e efeitos de agrotóxicos -, além de apresentar um breve histórico da síndrome "colony collapse disorder" (CCD) nos Estados Unidos e na Europa. Abordaram-se com mais detalhes os estudos desenvolvidos no Brasil, principalmente sobre agrotóxicos utilizados na agricultura e patógenos e parasitas que acometem as colônias de A. mellifera africanizada. Casos de enfraquecimento, declínio e colapso têm sido registrados, principalmente nos estados de São Paulo e Santa Catarina, que somam grandes perdas. Resultados das ocorrências analisadas indicaram que as mortalidades em massa registradas no Brasil não estavam associadas a patógenos ou a parasitas. Somente dois casos com características semelhantes às descritas para CCD foram registrados, porém sem causas definidas. Para que se conheçam as causas de enfraquecimentos e perdas de colônias de abelhas, é urgente a implementação de programas oficiais de levantamento sistemático da sanidade apícola, associados a pesquisas com foco nas avaliações dos possíveis impactos da fragmentação de habitats e das práticas agrícolas sobre as comunidades de abelhas.Termos para indexação: Apis mellifera, abelha africanizada, distúrbio do colapso das colônias, nutrição de abelhas, patologia apícola, polinização. Weakness and collapse of bee colonies in Brazil: are there cases of CCD?Abstract -In the last decades, the decline of wild bee populations and the collapse of Apis mellifera colonies have concerned researchers and beekeepers. The objective of this review was to compile some of the most relevant studies related to the possible causes of these problems -such as nutrition, management, pathogens, parasites, and the effects of pesticides -, besides presenting a brief history of the colony collapse disorder syndrome (CCD) in the United States and Europe. The studies developed in Brazil were presented in more detail, mainly those on pesticides used in agriculture and on pathogens and parasites that attack the colonies of Africanized A. mellifera. Cases of weakening, decline, and collapse have been recorded in Brazil, mainly in the states of São Paulo and Santa Catarina, which add up to great losses. Results of the analyzed occurrences indicated that the recorded mass mortalities were not associated with pathogens or parasites. Only two cases with characteristics similar to those described for CCD were recorded, but without defined causes. In order to know the causes of the weakening and collapses of colonies, the implementation of official programs is urgent for the systematic survey of bee health, associated with research focusing on assessments of possible impacts of habitat fragmentation and agricultural practices on bee communities.

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Avaliação da toxicidade aguda (DL50 e CL50) de inseticidas para Scaptotrigona tubiba (Smith) (Hymenoptera: Apidae): via de contato

Cited by 27 publications

References 10 publications

Comparative Toxicity of Pesticides to Stingless Bees (Hymenoptera: Apidae: Meliponini)

Comparative Toxicity of Pesticides to Stingless Bees (Hymenoptera: Apidae: Meliponini)

Consumption of the neonicotinoid thiamethoxam during the larval stage affects the survival and development of the stingless bee, Scaptotrigona aff. depilis

Enfraquecimento e perda de colônias de abelhas no Brasil: há casos de CCD?

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