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Search Results: 1 - 10 of 3334 matches for " green lacewings "
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Ocorrência de Ungla Navás (Neuroptera, Chrysopidae) no Brasil e descri??o de nova espécie
Freitas, Sérgio de;
Revista Brasileira de Entomologia , 2007, DOI: 10.1590/S0085-56262007000400004
Abstract: the neotropical genus ungla navás, 1914 is recorded for the first time in the brazilian ecosystem. a new species is described from sete lagoas, minas gerais, brazil. a key for the ungla species is added.
Potencial reprodutivo de Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) em fun??o do número de indivíduos por unidade de cria??o
Pessoa, Luis Gustavo Amorim;Freitas, Sérgio de;
Revista Brasileira de Entomologia , 2008, DOI: 10.1590/S0085-56262008000300022
Abstract: this work was carried out to investigate the reproductive potential of chrysoperla externa subjected to different densities per rearing unit. adults of the f4 offspring were kept at 25 ± 1°c, rh 70 ± 10% and 12 h photophase. it was used the following densities per rearing unit (10 cm of diameter by 23 cm of height, and volume of 1650 cm3): 1 male: 3 female, 2 males: 6 females, 3 males: 9 females and 4 males: 12 females. it was evaluated the pre-oviposition period, the daily and total oviposition per female and per rearing unit, the percentage of viable and infertile eggs percentage and the exploitation index per female and per rearing unit. the density 4 males: 12 females presented better exploitation when compared to the other densities thus equalizing the low values obtained for the mean and total egg laying per female.
Aspectos biológicos de Chrysoperla externa (Hagen, 1861)(Neuroptera: Chrysopidae) em casa-de-vegeta??o
Boregas, Katia Gisele Brasil;Carvalho, César Freire;Souza, Brígida;
Ciência e Agrotecnologia , 2003, DOI: 10.1590/S1413-70542003000100001
Abstract: this work was developed with the goal to study in greenhouse, some biological aspects of the immature and adult stages of chrysoperla externa (hagen), feeding its larvae with eggs of anagasta kuehniella (zeller) and adults with artificial diets. the embryonic period was determined by utilizing glass tubes of 2.5 x 8.5 cm, transparent plastic cage of 2.5 x 1.0 cm and pvc tube of 10.0 x 10.0 cm (with and without humidifier). the biological aspects of the larval and pupal stage were determined by confining them in glass tubes and plastic cages and the adults in pvc cages of 10.0 x 10.0 cm, feeding them with diets: yeast + honey, soy extract + honey and pollen + honey, at two consistencies, semi-liquid and pasty. the embryonic period was not influenced by the sort of container, ranging from 6.3 ± 0.2 to 7.6 ± 0.7 days. when the eggs were kept in the plastic cages, the percentage of hatching was 71%, however, in those of pvc and without a humidifier the mean was of 88.0 ± 5.0%. the duration of the 1st and 2nd instars was not influenced by the type of rearing container, 3rd instar larvae confined in glass tubes presented a duration of 2.3 ± 0.1 days and those reared in plastic cages the mean was of 1.6 ± 0.1 days. the greatest predatory capacity (2630.0 ± 224.8 eggs) was obtained for larvae of 3rd ínstar kept in glass tubes and of 1919.9 ± 151.6 eggs when kept in plastic cages fixed on cotton plant leaves. both the duration and survival rate of that stage were not influenced by the sort of rearing container with a range of 5.5 ± 0.4 to 6.1 ± 0.4 days and 67.9 ± 3.9 to 74.4± 3.9%, respectively. the duration and survival of the pupa stage were not affeted by the type of cage being of 13.5 ± 0.3 days and 60% of adults emerged. the diet made up of yeast + honey in either the liquid or the pasty form showed the best results with a total fecundity of 387.8 ± 86.2 and 211.0 ± 41.4 eggs/female, respectively. the females fed on that same type of diet in the liquid form had higher
Compatibilidade entre Beauveria bassiana e o predador Chrysoperla externa em laboratório
Pessoa, Luis Gustavo Amorim;Cavalcanti, Ricardo Sousa;Moino Júnior, Alcides;Souza, Brígida;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005000600014
Abstract: the objective of this work was to evaluate the effect of the fungus beauveria bassiana on eggs and larvae of chrysoperla externa. eggs with 24 hours and insects on 1st, 2nd and 3rd instar were immersed in fungal suspensions at 1,0x104 to 1,0x108 conidia ml-1 . there was no fungal effect on the eggs viability. third instar larvae were affected by b. bassiana, and the suspensions with 1,0x107 and 1,0x108 conidia ml-1 interfered in the evaluated parameters.
Toxicological and ultrastructural analysis of the impact of pesticides used in temperate fruit crops on two populations of Chrysoperla externa (Neuroptera, Chrysopidae)
Moura, Alexandre Pinho de;Carvalho, Geraldo Andrade;Cosme, Luciano Veiga;Alves, Eduardo;Botton, Marcos;Silva, Patrícia Sobral;
Revista Brasileira de Entomologia , 2011, DOI: 10.1590/S0085-56262011005000046
Abstract: this study aimed to evaluate the effects of (g a.i. l-1) abamectin (0.02), carbaryl (1.73), sulphur (4.8), fenitrothion (0.75), methidathion (0.4), and trichlorfon (1.5) on the survival of larvae and pupae, on the oviposition of adults and hatching of eggs from treated chrysoperla externa third-instar larvae from two different populations (bento gon?alves and vacaria, rio grande do sul state, brazil). morphological changes caused by abamectin to eggs laid by c. externa from vacaria population were evaluated by mean of ultrastructural analysis. the pesticides were applied on glass plates. distilled water was used as control. for the evaluation of larvae mortality, a fully randomized experimental design in a 2 x 7 (two populations x seven treatments) factorial scheme was used, whereas for the effects of the compounds on oviposition capacity and egg viability, a 2 x 4 factorial scheme was used. carbaryl, fenitrothion, and methidathion caused 100% mortality of larvae. abamectin reduced the hatching of eggs from treated third-instar larvae of both populations; however, this pesticide presented highest toxicity on insects from vacaria. the ultrastructural analysis showed that abamectin caused malformations in micropyle and in chorion external surface of c. externa eggs. based in the total effect (e), carbaryl, fenitrothion, and methidathion are harmful to c. externa; trichlorfon is harmless to third-instar larvae, while abamectin and sulphur are harmless and slightly harmful to third-instar larvae from bento gon?alves and vacaria, respectively.
Taís Carmona Lavagnini,Sérgio Freitas
Nucleus , 2012,
Abstract: Os crisopídeos ocorrem em diversos agroecossistemas e alimentam-se de diversos artrópodes-praga e,portanto podem ser utilizados como agentes em programas de controle biológico de pragas agrícolas. O sucesso doscrisopídeos pode estar relacionado a sua capacidade de sobrevivência e reprodu o em campo. Esta característicapode ser alterada por diversos fatores, inclusive a temperatura. Objetivou-se com este estudo verificar se astemperaturas de cria o das fases imaturas de Chrysoperla externa (Hagen, 1861) podem influenciar a suacapacidade reprodutiva e a longevidade dos adultos. As fases imaturas foram criadas em quatro ambientes de cria o,três com temperaturas constantes de 19, 25 e 31°C e outro ambiente em que houve flutua o dos fatores abióticos.Os adultos obtidos foram mantidos em salas climatizadas à 25oC para avalia o da capacidade reprodutiva e dalongevidade. Os dados obtidos n o diferiram significativamente entre os ambientes onde as fases imaturas foramcriadas. Conclui-se que a capacidade reprodutiva e a longevidade n o ser o alteradas quando as fases jovens foremcriadas em temperaturas diferentes.The green lacewings occur in many agroecosystems and eat a lot of pests, so they can be used inbiological control programs for agricultural pests. The success of them is related with their capacity of living in thiskind of environment and reproduce. This attribute can be influenced for many factors, such as temperature. Thepurpose of this study was to check if different rearing temperatures of immature stages of Chrysoperla externa(Hagen, 1861) can influence their reproductive capacity and longevity. The immature stages were reared in fourenvironments, three of them with constants temperatures of 19, 25 and 31oC and in the fourth environment theabiotic factors were not controlled. The adults obtained of this rearing were maintained at 25oC for evaluation ofreproductive capacity and longevity. The results obtained didn′t differ significantly among the environments wherethe immature stages were kept. It can be concluded that the reproductive capacity and longevity will not influencedwhen the immature stages were reared in different temperatures.
Residual Effect of Pesticides used in Integrated Apple Production on Chrysoperlaexterna (Hagen) (Neuroptera: Chrysopidae) Larvae Efecto Residual de los Pesticidas utilizados en la Producción integrada de Manzanas en las Larvas de Chrysoperla externa (Hagen) (Neuroptera: Chrysopidae)
Alexandre P Moura,Geraldo A Carvalho,Marcos Botton
Chilean Journal of Agricultural Research , 2012,
Abstract: Temperate fruit crops are an important economic activity for growers in southern Brazil. However, several pest species are associated to apple (Malus domestica Borkh.) crops in Brazil. Pesticides are largely used to control them and one way to change this is to combine selective pesticides and predator insects. The goal of this research was to evaluate the effects of the abamectin, carbaryl, fenitrothion, methidathion, sulfur, and trichlorfon pesticides on the survival and stage length of larvae and pupae, adult oviposition from treated larvae, and hatched eggs of two Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) populations. The compounds were sprayed on glass plates in accordance with the International Organization for Biological Control (IOBC) recommendations. First- and second-instar larvae were exposed to pesticide residues. Carbaryl, fenitrothion, and methidathion caused 100% mortality of first- and second-instar larvae. Changes in the number of eggs laid by females from first- and second-instar larvae exposed to residues of abamectin and sulfur, or abamectin, sulfur, and trichlorfon, respectively, were not observed. Only abamectin reduced the number of hatched eggs laid by females in Bento Gon alves from treated first-instar larvae. Sulfur reduced the viability of C. externa eggs in Bento Gon alves and Vacaria females from treated second-instar larvae, whereas trichlorfon and abamectin reduced the viability of eggs in Vacaria females. In conclusion, carbaryl, fenitrothion and methidathion were harmful to C. externa. Trichlorfon was harmful to first-instar larvae and slightly harmful to second-instar larvae. Abamectin and sulfur were slightly harmful to first-instar larvae and harmless to second-instar larvae. El cultivo de frutas de clima templado es una actividad económica importante para agricultores del Sur de Brasil. Sin embargo, varias especies de plagas están asociadas al cultivo de la manzana (Malus domestica Borkh.) en Brasil. Los plaguicidas son muy utilizados para su control, y una manera de cambiar esto es la combinación de plaguicidas selectivos e insectos depredadores. Este trabajo tuvo como objetivo evaluar los efectos de abamectina, carbaril, azufre, fenitrotion, metidation, y triclorfon en la supervivencia de larvas y pupas, en la ovipostura de adultos, y en la viabilidad de huevos de dos poblaciones de Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae). Los tratamientos fueron aplicados en placas de vidrio, y las larvas fueron sometidas a contacto con los productos. Carbaril, fenitrotion, y metidation causa
Nomenclatorial changes and redescriptions of three of Navás’ Leucochrysa (Nodita) species (Neuroptera: Chrysopidae)
Catherine Tauber,Gilberto Albuquerque,Maurice Tauber
ZooKeys , 2011, DOI: 10.3897/zookeys.92.828
Abstract: Three species that Navás described – Leucochrysa (Nodita) azevedoi Navás, 1913, Leucochrysa (Nodita) camposi (Navás, 1933) and Leucochrysa (Nodita) morenoi (Navás, 1934) – have received recent taxonomic attention. All three have many similar external features; indeed Navás himself, as well as subsequent authors, have confused the species with each other. Here, (a) misidentifications are corrected; (b) a neotype of L. azevedoi is designated; (c) L. (N.) morenoi, previously synonymized with L. (N.) camposi, is recognized as a valid species [Reinstated status] All three species are redescribed and illustrated, with special emphasis on the types. Leucochrysa (N.) azevedoi was found to be relatively common in agricultural areas along Brazil’s Atlantic coast. The two other species are known only from their type localities: Leucochrysa (N.) camposi – coastal Ecuador, and Leucochrysa (N.) morenoi – Quito, Ecuador.
Aspectos da preda??o entre larvas de Chrysoperla externa (Hagen, 1861) e Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae) em laboratório
Souza, Brígida;Costa, Renildo Ismael Félix;Tanque, Ricardo Lima;Oliveira, Patrícia de Souza;Santos, Fabíola Alves;
Ciência e Agrotecnologia , 2008, DOI: 10.1590/S1413-70542008000300002
Abstract: this work aimed to study aspects of predation among chrysoperla externa and ceraeochrysa cubana larvae under laboratory conditions. the survival of those predators in different larval stages was studied, maintaining the larvae grouped in proportions of 1:1, 2:2 and 3:3 individuals. c. externa presented higher survival rates, independently of larval ínstar and density proportion among individuals. on the other hand, c. cubana was strongly affected by interaction with c. externa, and had its survival capacity reduced with the increase of grouping proportion and larval development. at the end of larval phase, a survival rate around 96, 90, and 95 and 56, 23 and 9% for c. externa and c. cubana in proportions of 1:1, 2:2 and 3:3 individuals, respectively, was verified.
A revision and key to the genera of Afrotropical Mantispidae (Neuropterida, Neuroptera), with the description of a new genus
Louwtjie Snyman,Michael Ohl,Mervyn W. Mansell,Clarke Scholtz
ZooKeys , 2012, DOI: 10.3897/zookeys.184.2489
Abstract: The Afrotropical Mantispidae genera have previously been neglected and are poorly known. The genera are revised and redescribed. A new genus Afromantispa Snyman and Ohl is described with Afromantispa tenella comb. n. as type species. Perlamantispa (Handschin, 1960) is synonymised with Sagittalata Handschin, 1959. The new combinations within the genus include S. austroafrica comb. n., S. bequaerti comb. n., S. dorsalis comb. n., S. girardi comb. n., S. nubila comb. n., S. perla comb. n., S. pusilla comb. n., S. similata comb. n., S. royi comb. n., S. tincta comb. n. and S. vassei comb. n. An illustrated key to the genera Afromantispa gen. n., Sagittalata Handschin, 1959, Mantispa Illiger, 1798, Cercomantispa Handschin, 1959, Rectinerva Handschin, 1959, Nampista Navás, 1914, and Pseudoclimaciella Handschin, 1960 is provided. The wing venation of Mantispidae is redescribed. Similarities between the genera are discussed. Subsequent studies will focus on revising the taxonomic status of species, which are not dealt with in this study.
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