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Florida Entomological Society, Florida Entomologist, 3(98), p. 1003-1005

DOI: 10.1653/024.098.0338

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Psorocampa denticulata(Lepidoptera: Notodontidae) Pupae as an Alternative Host forPalmistichus elaeisis(Hymenoptera: Eulophidae)

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Psorocampa denticulata Schaus (Lepidoptera: Notodontidae) is a pest of Eucalyptus species (Myrtales: Myrtaceae) in Brazil. The pre-pupa stage of this species is present in the soil surrounding infested trees for up to 6 mo during the dry season and can be collected and stored in large numbers. The potential use of P. denticulata pupae as an alternative host for rearing the parasitoid Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) was tested in the laboratory. Up to 24-h-old P. denticulata pupae (787.40 ± 78.29 mg) were individually exposed to twenty 72-h-old P. elaeisis females for 48 h. These exposed pre-pupae were individually transferred to a glass tube for the emergence either of parasitoid progeny or of the adult lepidopteran. The parasitism and emergence rates of P. elaeisis from P. denticulata pupae were 100 and 90%, respectively. The life cycle (egg to adult) was 22.22 ± 0.49 days, and the number of progeny of this parasitoid was 734.55 ± 54.56 per host. We concluded that this generalist parasitoid could be mass reared on P. denticulata pupae and released as part of an integrated program to manage lepidopteran pests in eucalyptus plantations. SumárioPsorocampa denticulata Schaus (Lepidoptera: Notodontidae) tem sido relatada como praga de Eucalyptus spp. (Myrtales: Myrtaceae) no Brasil. Esta espécie tem um estagio de pré-pupa no solo por seis meses, durante a estação seca, e pode ser coletada e armazenada em grandes números. A possibilidade de utilização de pré-pupas de P. denticulata como hospedeiro alternativo para criação do parasitoide Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) foi avaliada em laboratório. Pupas de P. denticulata (787,40 ± 78,29 mg) com até 24 h de idade foram expostas individualmente a 20 fêmeas de P. elaeisis, com 72 h de idade, durante 48 horas. Estas pupas foram transferidas para tubos de vidro para obtenção da progênie desse parasitoide ou de adultos de P. denticulata. As taxas de parasitismo e emergência da progênie de P. elaeisis em pupas de P. denticulata foram de 100 e 90%, respectivamente. O ciclo de vida (ovo a adulto) foi de 22,22 ± 0,49 dias e o número de descendentes do parasitoide de 734,55 ± 54,56 por pupa hospedeira. O parasitoide generalista, P. elaeisis, pode ser criado com pupas de P. denticulata e ser liberado como parte do programa integrado para o manejo de lepidópteros praga em plantios de eucalipto. View this article in BioOne