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| Registros recuperados: 23 | |
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| Santos, Lindinalva dos; Trindade, Roseane Cristina Prédes; Santos, Djison Silvestre dos; Dias, Mirandy dos Santos; Broglio, Sônia Maria Forti; Lemos, Eurico Eduardo Pinto de. |
| The effects of ethanolic and hexanic extracts of soursop and sugar apple (EES, EHS, EESA and EHSA, respectively) on Aphis gossypii (Hemiptera: Aphididae) and its natural enemy Eriopis connexa (Coleoptera: Coccinellidae) by contact exposure, residual effect and ingestion tests were evaluated. The estimated LC50 and LC99 values for A. gossypii were 0.39% and 5.47% for (EESA); 0.23% and 1.19% for (EES); 0.47% and 4.39% for (EHSA); and 0.42% and 6.38% for (EHS), respectively. Considering contact exposure, EES at 0.23% was innocuous, and EHS at 0.42% was slightly harmful; for adult ladybugs, only EESA (5.47%) was classified as slightly harmful, with the other treatments classified as harmless. The results were similar for the residual effect. For selectivity... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Lethal concentrations; Ladybug; Annona squamosa; Annona muricata.; Controle biológico. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36267 |
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| Loeza-Kuk,Emiliano; Ochoa-Martínez,Daniel L.; Mora-Aguilera,Gustavo; Rivas-Valencia,Patricia; Gutiérrez-Espinosa,M. Alejandra; Cintra de Jesús Junior,Waldir; Villegas-Monter,Ángel; Arno-Wulff,Nelson; Perez-Molphe-Balch,Eugenio. |
| Individuals of Toxoptera citricida (Kirkaldy) and Aphis spiraecola (Patch) collected in 16 commercial citrus orchards of the São Paulo and Minas Gerais States of Brazil were analyzed for virus presence. Orchards of Minas Gerais were selected because citrus trees exhibit symptoms of citrus sudden death (CSD) and in São Paulo due the presence of severe strains of Citrus tristeza virus (CTV), in order to detect genomic sequences of any of these strains that could be associated to CSD. Samples made up of 20 aphids from the localities of Comendador Gomes, Frutal, Prata and Uberlândia, in the State of Minas Gerais, a CSD associated virus (CSDaV) was often found through nested RT-PCR; in samples from São Paulo, none showed positive for the same primers. With the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Virus detection; Citrus tristeza virus; Citrus sudden death-associated virus. |
| Ano: 2008 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952008000600007 |
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| FERNANDES,FRANCISCO S.; GODOY,WESLEY A.C.; RAMALHO,FRANCISCO S.; GARCIA,ADRIANO G.; SANTOS,BÁRBARA D.B.; MALAQUIAS,JOSÉ B.. |
| ABSTRACT Population dynamics of aphids have been studied in sole and intercropping systems. These studies have required the use of more precise analytical tools in order to better understand patterns in quantitative data. Mathematical models are among the most important tools to explain the dynamics of insect populations. This study investigated the population dynamics of aphids Aphis gossypii and Aphis craccivora over time, using mathematical models composed of a set of differential equations as a helpful analytical tool to understand the population dynamics of aphids in arrangements of cotton and cowpea. The treatments were sole cotton, sole cowpea, and three arrangements of cotton intercropped with cowpea (t1, t2 and t3). The plants were infested with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Cotton; Cowpea; Dynamics; Mathematical models. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100311 |
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| Sarmento,Renato Almeida; Pallini,Angelo; Venzon,Madelaine; Souza,Og Francisco Fonseca de; Molina-Rugama,Adrián José; Oliveira,Claudinei Lima de. |
| This work evaluated the functional response of adult females of Eriopis connexa to different densities of Macrosiphum euphorbiae and Tetranychus evansi. When preying upon aphids, E. connexa presented a sigmoidal functional response (Type III). This behavior, however, changed drastically to an exponential (Type II) functional response, when mites (T. evansi), rather than aphids, were offered to E. connexa. Such different patterns showed that this coccinellid needed to adopt distinct strategies according to the kind of prey available. Since predators were believed to be able to regulate prey populations only when adopting Type III functional response. E. connexa would be a good candidate for a biological control agent of M. euphorbiae, but would not suppress... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological control; Coccinellids; Aphids; Mites; Lycopersicon esculentum Mill. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100014 |
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| Peñalver-Cruz,Ainara; Ortiz-Martínez,Sebastián; Villegas,Cinthya; Tomanovic,Zeljko; Zepeda-Paulo,Francisca; Zikic,Vladimir; Lavandero,Blas. |
| Abstract During the samplings described here, Aphidius avenae (=picipes) (Haliday, 1834) was collected. This species has been reported in Chile but has never been studied in terms of its relative abundance and prevalence in central and southern Chile by using classical or molecular methods. The composition of the parasitoid assemblages on several cereal aphid hosts was examined for three seasons in agricultural landscapes. In this note, we describe the prevalence of this parasitoid species in cereal aphids and other aphid hosts and discuss the abundance of this parasitoid compared to other aphid parasitoids and the probable origins of this important aphid parasitoid species in Chile. The results indicate that A. avenae has a low prevalence compared to... |
| Tipo: Journal article |
Palavras-chave: Aphids; Braconidae; Hosts; Parasitoids; Tomato; Wheat. |
| Ano: 2017 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202017000200207 |
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| Auad,Alexander M.; Freitas,Sérgio de; Barbosa,Leonardo R.. |
| Feeding potential of Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) in different densities of Uroleucon ambrosiae (Thomas) (Hemiptera, Aphididae). The feeding potential of 2nd and 3rd instar larvae of Chrysoperla externa (Hagen, 1861) in relation to different densities of 30, 40 and 50 nymphs of Uroleucon ambrosiae (Thomas, 1878) at 3rd and 4th instars was evaluated. The treatments were individualized into 2.5 cm in diameter and 8.5 cm tall flat bottom glass vials and maintained in a controlled environmental chamber at 25±2 ºC temperature, 70±10% RH and 14 h photophase. A completely randomized experimental design with 10 replications was used. The consumption of the prey nymphs by the predator larvae was evaluated after 1, 2, 4, 8, 16 and 24 h from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Biological control; Green lacewing; Predation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000100003 |
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| de Castro-Guedes,Camila Fediuk; de Almeida,Lúcia Massutti; do Rocio Chiarello Penteado,Susete; Moura,Mauricio Osvaldo. |
| ABSTRACT The biology, reproductive variables and population growth indicators of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) fed on three diets, namely Cinara atlantica (Wilson, 1919) (Hemiptera: Aphididae), Brevicoryne brassicae (Linnaeus, 1758) (Hemiptera: Aphididae), and frozen eggs of Anagasta kuehniella (Zeller, 1879) (Lepidoptera: Pyralidae), were evaluated. With all three diets, birth rate was higher than mortality, resulting in positive rm values and thus indicating population growth. Under the conditions used in the experiments, H. axyridis was able to survive, develop and reproduce normally. This demonstrates that are different kind of food that can be essential for supporting the reproduction of some species of Coccinellidae,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Development time; Harlequin ladybird; Life table. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000300260 |
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| Sturza,Vinícius Soares; Dorfey,Cecília; Poncio,Sônia; Dequech,Sônia Thereza Bastos; Bolzan,Anderson. |
| First record of larvae of Allograpta exotica Wiedemann (Diptera, Syrphidae) preying on Aphis gossypii Glover (Hemiptera, Aphididae) in watermelon in Brazil. Brazil is one of the largest world producers of watermelon (Citrullus lanatus Thumb. Mansf.) and Aphis gossypii Glover, 1877 (Hemiptera, Aphididae) is among the most important pest on this crop. Larvae of Allograpta exotica Wiedemann, 1830 (Diptera, Syrphidae) were found preying on A. gossypii in watermelon crop, in Santa Maria, Rio Grande do Sul State, what represents the first report of this tritrophic association in Brazil. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Cucurbit; Predator; Tritrophic association. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000200019 |
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| Conti,Bruno F. De; Bueno,Vanda Helena P.; Sampaio,Marcus V.; Sidney,Livia A.. |
| Temperature is a key abiotic factor influencing the development and reproduction of aphids. The effect of temperature on the reproduction of three aphid species Aulacorthum solani (Kaltenbach), Macrosiphum euphorbiae (Thomas) and Uroleucon ambrosiae (Thomas) (Aphididae, Macrosiphini) has been investigated and fertility life tables were determined. Nymphs were reared in climatic chambers at temperatures of 16, 19, 22, 25, and 28 ± 1ºC, RH 70 ± 10% and 12 h photophase. Female adult aphids developed at these temperatures were then used in experiments in which pre-reproductive and reproductive periods were evaluated every 24 h. In addition, the number of nymphs produced and longevity were determined at each temperature. The reproduction period of A. solani and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Growing parameters; Intrinsic rate of increase; Lettuce; Longevity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000400018 |
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| Szpeiner,Alfonsina. |
| In 30 surveys across Cordoba city and surroundings (Argentina) I recorded, from November 2001 to May 2002, a total of 109 ornamental plants infested with aphid colonies. Surveys were conducted in the local botanical garden as well as homestead gardens and nurseries. Seventeen species of aphids were identified, 4 of which are new species in the area, from 47 ornamental plants. In a total of 59 plant/aphid associations, 38 new associations were found. I present the first record of aphids colonizing Cactaceae in Argentina. Most aphid colonies were medium and a high proportion (more than 40%) showed alate individuals. The most frequent aphid species, Aphis gossypii Glover and Aphis craccivora Koch were especially associated with the most frequent damages:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aphids; Ornamental plants; Richness; Damages; Urban areas. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802008000100006 |
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| Auad,Alexander Machado; Moraes,Jair Campos de. |
| The aphid Uroleucon ambrosiae (Thomas) is considered a pest of hidroponically-grown lettuce, but basic and applied information on its control are scarce in Brazil. The aim of this study was to determine the effect of different temperatures on biological aspects and life history of U. ambrosiae (Thomas) developing on hydroponic lettuce (Lactuca sativa L.) crop. Newly emerged nymphs were placed on 4-cm discs of hydroponic lettuce, var. Verônica, which were maintained on 5-cm Petri dishes, at temperatures of 15, 20 and 25ºC and 14 h photophase, and inside a greenhouse, within micro-cages at room temperature. The duration of development in all nymphal stages varied inversely to temperature. Nymphs maintained at 20ºC and 25ºC, had similar development period.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Aphids; Biology; Climatic factors. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400008 |
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| Registros recuperados: 23 | |
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