Himenópteros parasitóides coletados em povoamento de <i>Eucalyptus grandis</i> e mata nativa em Ipaba, estado de Minas Gerais.

Abstract

A composição e a frequência da fauna de himenópteros parasitóides foi estudada em reflorestamento de Eucalyptus grandis W. Hill ex. Maiden e mata nativa, empregando-se 11 armadilhas Malaise em um transecto eucalipto-mata nativa de março de 1997 a março de 1998. Foram coletados 2.099 indivíduos de nove superfamílias e 26 famílias desse grupo. As famílias mais abundantes foram Ichneumonidae, Braconidae, Scelionidae e Eulophidae com 577, 452, 374 e 185 indivíduos respectivamente. O número de parasitóides foi maior nas proximidades e bordas da vegetação nativa, o que demonstra que fragmentos de vegetação nativa, intercalados com plantios de eucalipto, podem ser recomendados como estratégia de manejo de pragas.Palavras-chave: inimigos naturais, eucalipto, mata nativa, diversidade de espécies. ABSTRACTComposition and frequency of hymenopteran parasitoids were studied in an Eucalyptus grandis W. Hill ex. Maiden plantation and in a native vegetation area with 11 Malaise traps in a transect native vegetation-eucalyptus plantation from March 1997 to March 1998. A total of 2,099 individuals of nine superfamilies and 26 families of this group was collected. The family with the highest number of individuals was Ichneumonidae followed by Braconidae, Scelionidae and Eulophidae with 577, 452, 374 and 185 individuals. Higher number of parasitoids was collected in the vicinity and borders of the native vegetation what demonstrates that fragments of native vegetation intermingled with eucalyptus plantations can be recommended as a strategy for pest management in these plantations.

Efeito da estrutura da paisagem e do genótipo de Eucalyptus na abundância e controle biológico de Glycaspis brimblecombei Moore (Hemiptera: Psyllidae)

“…ns = não significativo; n = 24. positivos da presença de remanescentes de vegetação nativa na abundância de parasitóides (Bragança et al 1998a, Freitas et al 2002, dall'oglio et al 2003 e nas taxas de parasitismo de pragas em eucaliptais (Murta et al 2008). da mesma forma, Sperber et al (2004) verificaram influência positiva da riqueza de árvores de vegetação remanescente em plantios de cacau (Theobroma cacao, Sterculiaceae) sobre a riqueza de famílias de parasitóides (Braconidae, Ichneumonidae, Encyrtidae, Scelionidae, entre outros).…”

Species of Lepidoptera defoliators of Eucalyptus as new host for the parasitoid Palmistichus elaeisis (Hymenoptera: Eulophidae)

“…Chalcidoidea and Ichneumonoidea are the most important groups of the Hymenoptera order in the forests where they parasitize eggs, larvae, pupae and adults of insects, mainly of the orders Coleoptera, Lepidoptera, Diptera and Homoptera (Berti Filho, 1985). The families Ichneumonidae, Braconidae, Scelionidae and Eulophidae have been the most abundant ones in eucalyptus plantations (Dall'Oglio et al, 2003). The family Eulophidae presents 283 genera and 3977 species in tropical and temperate areas as endoparasitoids or ectoparasitoids; idiobiontes or koinobiontes; solitary or gregarious; primary or hiperparasitoids; specialists or generalists and many of these species have been studied and used with success in programs of biological control (Noyes, 1998;Gauthier et al, 2000;Hansson, 2004).…”

Environmental Determinants Affecting the Occurrence of Defoliator Caterpillars onEucalyptus(Myrtaceae) plantations in the Brazilian Amazonian Region

“…Previous research has shown that Hymenoptera natural enemies were more abundant at the edge of eucalyptus plantations adjacent to native forests and inside native forests than inside eucalyptus plantations (Freitas et al 2002). The abundance of Hymenoptera parasitoids was also higher at the edge of native vegetation adjacent to eucalyptus plantations compared with their abundance inside these plantations (Dall'oglio et al 2003). Strips of native vegetation can increase the diversity and abundance of natural enemies and their effectiveness in biological control Freitas et al 2002).…”