Ocorrência de Aphelinus gossypii Timberlake (Hymenoptera: Aphelinidae) parasitando Aphis gossypii Glover (Hemiptera: Aphididae) em algodão no estado de Pernambuco

Fernandes, Adriana M.V.; Farias, A. M.; Faria, Cristina A.; Tavares, Marcelo Teixeira

doi:10.1590/s0301-80592000000400026

Cited by 8 publications

(5 citation statements)

References 3 publications

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“…Due to its broad spectrum for insect control and variety of formulations (Actara 25 WG, 1 GR, 240 SC; and Cruiser 350 FS, 70 WS), thiamethoxam recommendations will be soon extended to many pests and crops where whiteflies and aphids occur as pest. On the other side, the aphelinid parasitoid Aphelinus gossypii Timberlake (Hymenoptera: Aphelinidae) and the coccinellid predator Delphastus pusillus (LeConte) (Coleoptera: Coccinellidae) are important natural enemies of cotton aphid and whiteflies, respectively, which have been receiving attention not only in cotton but also in other ecosystems as regulatory agents of pest species (Hoelmer et al, 1993;Heinz et al, 1994;Tokumaru & Takata, 1996;Fernandes et al, 2000;Godfrey et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Toxicity of pymetrozine and thiamethoxam to Aphelinus gossypii and Delphastus pusillus

Torres

Silva-Torres

Oliveira

2003

Pesq. agropec. bras.

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-The objective of this work was to study the toxicity of pymetrozine and thiamethoxam to the cotton aphid parasitoid Aphelinus gossypii Timberlake and to the whitefly predator Delphastus pusillus (LeConte). Cotton leaves containing mummies of the parasitoid A. gossypii were collected and treated with seven concentrations of both insecticides. Parasitoid emergence was not affected by pymetrozine and ranged from 59.9% to 75.0%, but decreased with the increase of thiamethoxam concentrations ranging from 30.2% to 69.6%. Cotton leaves infested by whitefly and treated with recommended rates of both insecticides were collected three hours, three days and six days after spraying and colonized with larvae and adults of D. pusillus. Predators released on thiamethoxamtreated leaves experienced mortality from 70% to 100%, while those released on pymetrozine-treated leaves showed mortality from 0% to 20%. Topical toxicity from both insecticides was studied on larvae, pupae and adults of D. pusillus. The survival of predator after six days of exposure to 400, 600 and 800 mg/L of pymetrozine a.i. was higher than 69.6%, and to 25, 100 and 200 mg/L of thiamethoxam a.i. was lower than 8.7%. The toxicity data for A. gossypii and D. pusillus characterize the pymetrozine as harmless for both species, and thiamethoxam of low to moderate toxicity for A. gossypii treated mummies, and high toxicity for D. pusillus.Index terms: Gossypium, infestation, parasitoids, insecticide selectivity. Toxicidade de pimetrozine e tiametoxam a Aphelinus gossypii e Delphastus pusillusResumo -O objetivo deste trabalho foi estudar a toxicidade de pimetrozine e tiametoxam ao parasitóide do pulgão-do-algodoeiro Aphelinus gossypii Timberlake e ao predador da mosca-branca Delphastus pusillus (LeConte). Folhas de algodoeiro contendo múmias do parasitóide A. gossypii foram coletadas e tratadas com sete concentrações de ambos inseticidas. A emergência do parasitóide não foi afetada pelo pimetrozine e variou de 59,9% a 75%, enquanto as múmias tratadas com tiametoxam produziram emergência de A. gossypii variando de 30,2% a 69,6%. Plantas infestadas por mosca-branca e tratadas com três concentrações recomendadas de ambos inseticidas foram coletadas três horas, três dias e seis dias após tratamento e colonizadas com larvas e adultos de D. pusillus. Os predadores liberados em folhas tratadas com tiametoxam apresentaram mortalidades de 70% a 100%, enquanto aqueles liberados em folhas tratadas com pimetrozine apresentaram mortalidade de 0% a 20%. Seis dias após tratamento tópico de larvas, pupas e adultos de D. pusillus com pimetrozine (i.a.) a 400, 600 e 800 mg/L, a população viva era acima de 69,6%, enquanto os tratados com tiametoxam (i.a.) a 25, 100 e 200 mg/L, apresentaram sobrevivência abaixo de 8,7%. O pimetrozine foi inócuo para A. gossypii e D. pusillus, e o tiametoxam mostrou toxicidade de baixa a moderada para múmias de A. gossypii e foi altamente tóxico a D. pusillus.Termos para indexação: Gossypium, infestação, parasitóide, seletividade de insetic...

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Section: Introductionmentioning

confidence: 99%

Toxicity of pymetrozine and thiamethoxam to Aphelinus gossypii and Delphastus pusillus

Torres

Silva-Torres

Oliveira

2003

Pesq. agropec. bras.

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“…After this period, very limited records focusing the postcolonization and the host range of aphid parasitoids on some cultivated plants were found in Brazil SousaSilva et al, 1998;Lara et al 1999;Fernandes et al 2000;Mendes et al, 2000;Pinto et al 2000;Cividanes 2002;Mussury & Fernandes. 2002;Ronquim et al 2004;Zanini et al 2006), and still fewer were found on ornamentals (Peronti 1999;Imenes et al 2002;Carvalho et al 2006).…”

mentioning

confidence: 99%

Aphid parasitoids (Hymenoptera, Braconidae, Aphidiinae) and their associations related to biological control in Brazil

Starý¹,

Sampaio²,

Bueno³

2007

Rev. Bras. entomol.

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An overall research interest in Aphidiine parasitoids of aphids has increased all over the world. Aphid pest problems and ecological aspects of their control undoubtedly contributed positively to this state. Searches for potentially useful biological control agents in the pest origin center frequently have demonstrated relatively poor knowledge in many areas and the same has been determined in subsequent research efforts targeting parasitoid release and establishment. These studies have also demonstrated a need for broader ecological studies of the local fauna, ecological associations and inter-relationships, and also management problems. Aphidiine parasitoids were also found to be rather useful subjects for several fundamental studies. These studies may be essential for the applied research or stimulated by problems found in it.Until the end of the 70's only three species of aphid parasitoids (Braconidae: Aphidiinae) Aphidius colemani Viereck, 1912, Diaeretiella rapae (M'Intosh, 1855, and Lysiphlebus testaceipes (Cresson, 1880) were known occur in Brazil (Araújo e Silva et al. 1968;Bartoszeck 1975Bartoszeck , 1976aPimenta & Smith 1976;Gravena 1979;De Santis 1980;Lázzari 1985). The species on the genus Ephedrus Haliday were found parasitizing Brachycaudus persicae (Passerini) (Araújo e Silva et al. 1968). The parasitoid Aphidius platensis Brèthes, 1913(Starý 1975 PALAVRAS-CHAVE. Afídeo; gama hospedeira; interação inseto-planta.

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“…In the Northeast, SOUZA et al (2003) andFERNANDES et al (2000), in Bahia and Pernambuco, respectively, reported the occurrence of L. testaceipes parasitoid in cotton, parasitizing A. gossypii, but not studied the parasitism rate and percentage of emergence in this association.…”

Section: Este é O Primeiro Relato Do Parasitoide Lysiphlebus Testaceimentioning

confidence: 99%

Occurrence of Lysiphlebus testaceipes parasitizing Aphis gossypii in watermelon in the State of Rio Grande do Norte, Brazil

et al. 2010

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Ocorrência de Aphelinus gossypii Timberlake (Hymenoptera: Aphelinidae) parasitando Aphis gossypii Glover (Hemiptera: Aphididae) em algodão no estado de Pernambuco

Cited by 8 publications

References 3 publications

Toxicity of pymetrozine and thiamethoxam to Aphelinus gossypii and Delphastus pusillus

Toxicity of pymetrozine and thiamethoxam to Aphelinus gossypii and Delphastus pusillus

Aphid parasitoids (Hymenoptera, Braconidae, Aphidiinae) and their associations related to biological control in Brazil

Occurrence of Lysiphlebus testaceipes parasitizing Aphis gossypii in watermelon in the State of Rio Grande do Norte, Brazil

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