Biological cycle of Tenuipalpus heveae Baker (Acari, Tenuipalpidae) on leaflets of three rubber tree clones
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Data
2010-06-01
Autores
Feres, Reinaldo José Fazzio [UNESP]
Del'Arco, Marcelo [UNESP]
Daud, Rodrigo Damasco [UNESP]
Título da Revista
ISSN da Revista
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Editor
Sociedade Brasileira de Entomologia
Resumo
O ciclo de vida de Tenuipalpus heveae Baker, 1945 (Tenuipalpidae), um potencial ácaro-praga da seringueira, foi estudado a partir de indivíduos criados sobre folíolos destacados dos clones GT 1, PB 235 e RRIM 600, em condições controladas. Três observações diárias foram realizadas, acompanhando-se o desenvolvimento de 60 ovos e de sua prole em folíolos de cada um dos clones, para verificação da oviposição das fêmeas e dos estágios de desenvolvimento. A partir dos dados obtidos, foi elaborada uma tabela de vida de fertilidade. Os ácaros criados sobre folíolos de PB 235 apresentaram rápido ciclo biológico, com menor tempo gasto, em dias, para duplicar sua população (TD) e os maiores valores para a produção de ovos, longevidade de fêmeas, taxa líquida de reprodução (Ro), taxa intrínseca de crescimento populacional (r m) e taxa finita de crescimento populacional (λ). em GT 1 foram observados valores inferiores e o maior tempo de desenvolvimento necessαrio para atingir a fase adulta. em todos os clones estudados a fase de maior viabilidade foi a deutoninfal, enquanto a menor, a larval, como evidenciado tambιm pelas curvas de sobrevivência, que indicaram maior mortalidade nesse estágio juvenil. O clone PB 235 possibilitou melhor desenvolvimento para T. heveae, seguido por RRIM 600, enquanto que GT 1 foi o menos favorável ao desenvolvimento dessa espécie.
Life cycle of Tenuipalpus heveae Baker (Acari, Tenuipalpidae) on leaflets from three rubber tree clones. The biological cycle of Tenuipalpus heveae Baker, 1945 (Tenuipalpidae), a potential rubber tree pest mite, was studied by the observation of individuals reared on leaflets of the clones GT 1, PB 235 and RRIM 600, in controlled environmental conditions. Three daily observations were done of 60 eggs on leaflets from each clone in order to verify the development of immature stages and the female oviposition. The fertility life table was constructed based in the collected data. Mites reared on PB 235 had faster rate of development, requiring less time in days, to double its population in number (TD), and had the highest values for egg production, female longevity, net reproductive rate (Ro), intrinsic rate of natural increase (r m) and finite rate of increase (λ). Lower reproductive values and the longest time necessary to reach adult stage were recorded for the mites on GT 1. In all studied clones, the deutonymphal phase had the highest viability, while the larval phase had the lowest, highlighted by the survivorship curve that indicated high mortality during this life stage. The clone PB 235 allowed the most suitable conditions for the development of T. heveae, followed by RRIM 600, while GT 1 was the less suitable substratum to rear this mite species.
Life cycle of Tenuipalpus heveae Baker (Acari, Tenuipalpidae) on leaflets from three rubber tree clones. The biological cycle of Tenuipalpus heveae Baker, 1945 (Tenuipalpidae), a potential rubber tree pest mite, was studied by the observation of individuals reared on leaflets of the clones GT 1, PB 235 and RRIM 600, in controlled environmental conditions. Three daily observations were done of 60 eggs on leaflets from each clone in order to verify the development of immature stages and the female oviposition. The fertility life table was constructed based in the collected data. Mites reared on PB 235 had faster rate of development, requiring less time in days, to double its population in number (TD), and had the highest values for egg production, female longevity, net reproductive rate (Ro), intrinsic rate of natural increase (r m) and finite rate of increase (λ). Lower reproductive values and the longest time necessary to reach adult stage were recorded for the mites on GT 1. In all studied clones, the deutonymphal phase had the highest viability, while the larval phase had the lowest, highlighted by the survivorship curve that indicated high mortality during this life stage. The clone PB 235 allowed the most suitable conditions for the development of T. heveae, followed by RRIM 600, while GT 1 was the less suitable substratum to rear this mite species.
Descrição
Palavras-chave
Ácaro fitófago, Hevea brasiliensis, resistência de plantas, sobrevivência, tabela de vida de fertilidade, Fertility life table, Hevea brasiliensis, Phytophagous mites, Plant resistance, survivorship
Como citar
Revista Brasileira de Entomologia. Sociedade Brasileira de Entomologia, v. 54, n. 2, p. 298-303, 2010.