Virulence of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) for the control of Diabrotica speciosa germar (coleoptera: chrysomelidae)

Os nematoides entomopatogenicos sao utilizados no controle biologico de pragas de solo, e sao promissores para o controle de D. speciosa. Neste trabalho, objetivou-se avaliar o potencial de especies nativas e exoticas de isolados de nematoides entomopatogenicos para o controle de D. speciosa, em condicoes de laboratorio e de casa de vegetacao. Verificou-se que todos os nematoides causaram mortalidade larval. Os mais virulentos foram Heterorhabditis sp. RSC01 (94%), Steinernema glaseri (84%), Heterorhabditis sp. JPM04 (82%) e Heterorhabditis amazonensis RSC05 (78%). Nao houve efeito dos isolados Heterorhabditis sp. RSC01 e S. glaseri em ovos. A mortalidade maxima de larvas de D. speciosa por Heterorhabditis sp. RSC01 foi observada na concentracao de 300 JI / inseto, enquanto para S. glaseri a maior mortalidade foi obervada na concentracao de 200 JI/ inseto. O isolado Heterorhabditis sp. RSC01 causou mais de 80% de mortalidade de pupas na concentracao de 250 IJ/ inseto. A virulencia de Heterorhabditis sp. RSC01 e S. glaseri foi afetada pela temperatura. O isolado Heterorhabditis sp. RSC01 causou reducao na sobrevivencia da larvas em casa de vegetacao em todas as concentracoes de juvenis infectantes testadas e nao houve diferenca na mortalidade entre os diferentes tratamentos.

• Publication year

  2011

• Venue

  Ciencia E Agrotecnologia

• Publication date

  2011-12-27

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1590/S1413-70542011000600015
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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