Bioecologia do percevejo bronzeado Thaumastocoris peregrinus carpintero & dellapé (hemiptera: thaumastocoridae) em eucalipto e prospecção de inimigos naturais
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Data
2010-06-22
Autores
Soliman, Everton Pires [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
O percevejo bronzeado do eucalipto, Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae), originário da Austrália distribuiu-se rapidamente nos plantios de eucalipto no Brasil, sendo diagnosticado em 2008 em SP e RS. Em todo o mundo pouco se conhece sobre sua biologia de modo que este estudo investigou a bioecologia de T. peregrinus em diferentes espécies e híbridos de eucalipto e em diferentes temperaturas e um primeiro levantamento dos inimigos naturais. A bioecologia em diferentes materiais vegetais foi estudada em Eucalyptus camaldulensis, E. urophylla, E. grandis e em 3 clones híbridos entre essas três espécies (clones „1277‟, „VM-1‟ e „H-13‟) em câmara bioclimatizada a 26 ± 1 °C, 70% ± 10% e fotofase de 12 horas. A espécie E. urophylla foi o material utilizado para a bioecologia em diferentes temperaturas (14, 18, 22, 26 e 30 ± 1 °C, 70% ± 10% e fotofase de 12 horas). O levantamento inicial de inimigos naturais foi realizado por observações de campo e testes laboratoriais. A biologia de diferentes genótipos indicou que a espécie E. urophylla e E. grandis são os mais adequados ao desenvolvimento e reprodução de T. peregrinus, apesar de todos os tratamentos permitirem que o percevejo-bronzeado se desenvolvesse e produzisse descendentes. A temperatura influenciou diretamente a duração das fases do ciclo e, na menor temperatura o desenvolvimento foi retardado, em comparação com as temperaturas mais elevadas. Porém, T. peregrinus conseguiu desenvolver e produzir descendentes férteis em todas as temperaturas estudadas. A pesquisa indicou existência de inimigos naturais no Brasil, principalmente insetos predadores e fungos entomopatogênicos que se adaptaram a presa ou hospedeiro. No campo foi observado a predação de ninfas de T. peregrinus por Chrysoperla externa (Neuroptera: Chrysopidae) e infecção por fungos da Ordem Entomophtorales em...
The bronze-bug Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) is originated from Australia and was spreaded rapidly in eucalyptus plantations in different countries In Africa and South America. In Brazil, he was detectedin 2008 in staes of Sao Paulo and Rio Grande do Sul. There is few information about its biology, then, this study aimed to determine the bioecology of T. peregrinus in different Eucalyptus species and hybrids and at different temperatures, besides to evaluated some natural enemies. In bioecology study were used the species Eucalyptus camaldulensis, E. urophylla, E. grandis and three clonal hybrids among these species in climated chamber at 26 ± 1° C, 70% ± 10% and photophase of 12 h. The species E. urophylla was the species choosed for bioecology study at temperatures of 14, 18, 22, 26 and 30 ± 1° C, maintained the same RH and photophase conditions of previous study. The survey of potential natural enemies was carried outthrough field observations and laboratory tests. The biology of different materials indicated E. urophylla and E. grandis were the best to development and reproduction of T. peregrines. However, the insect developed and produced fertile offspring in all treatments. The temperature directly influenced the duration of the cycle stages, and at lower temperatures development was delayed comparing to higher temperatures. Nevertheless the bronze bug could be developed and produce fertile offspring in all temperatures tested. In the field survey it was founded few natural enemies being some predatory insects have adapted to prey the pest. In the field was diagnosed predation of nymphs of T. peregrinus by Chrysoperla externa (Neuroptera: Chrysopidae) and infection by Entomophtorales spp. in adults and nymphs. In laboratory conditions, the predator Atopozelus opsimus (Hemiptera: Reduviidae) fed both nymphs and adults. T. peregrinus developed and ... (Complete abstract click electronic access below)
The bronze-bug Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) is originated from Australia and was spreaded rapidly in eucalyptus plantations in different countries In Africa and South America. In Brazil, he was detectedin 2008 in staes of Sao Paulo and Rio Grande do Sul. There is few information about its biology, then, this study aimed to determine the bioecology of T. peregrinus in different Eucalyptus species and hybrids and at different temperatures, besides to evaluated some natural enemies. In bioecology study were used the species Eucalyptus camaldulensis, E. urophylla, E. grandis and three clonal hybrids among these species in climated chamber at 26 ± 1° C, 70% ± 10% and photophase of 12 h. The species E. urophylla was the species choosed for bioecology study at temperatures of 14, 18, 22, 26 and 30 ± 1° C, maintained the same RH and photophase conditions of previous study. The survey of potential natural enemies was carried outthrough field observations and laboratory tests. The biology of different materials indicated E. urophylla and E. grandis were the best to development and reproduction of T. peregrines. However, the insect developed and produced fertile offspring in all treatments. The temperature directly influenced the duration of the cycle stages, and at lower temperatures development was delayed comparing to higher temperatures. Nevertheless the bronze bug could be developed and produce fertile offspring in all temperatures tested. In the field survey it was founded few natural enemies being some predatory insects have adapted to prey the pest. In the field was diagnosed predation of nymphs of T. peregrinus by Chrysoperla externa (Neuroptera: Chrysopidae) and infection by Entomophtorales spp. in adults and nymphs. In laboratory conditions, the predator Atopozelus opsimus (Hemiptera: Reduviidae) fed both nymphs and adults. T. peregrinus developed and ... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Percevejo (Inseto), Eucalipto, Percevejo bronzeado, Bioecology, Eucalyptus, Bronze bug, Biological control
Como citar
SOLIMAN, Everton Pires. Bioecologia do percevejo bronzeado Thaumastocoris peregrinus carpintero & dellapé (hemiptera: thaumastocoridae) em eucalipto e prospecção de inimigos naturais. 2010. vi, 80 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2010.