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Ecological aspects of lepidopteran caterpillar parasitoids from Caryocar brasiliense Camb. (Caryocaraceae) in a cerrado sensu stricto of Central Brazil Biota Neotropica
Rodovalho,Sheila Rodrigues; Laumann,Raúl Alberto; Diniz,Ivone Rezende.
This study quantified parasitoid occurrence on five lepidopteran caterpillars species that use Caryocar brasiliense as host plant, trying to verify if there was a direct relationship between host abundance and the proportion of parasitism; if leaf shelters served as cues or protection from parasitoids; if host size influenced the proportion of parasitism, and if attacks by Diptera were more frequent than by Hymenoptera. Searches for external folivorous caterpillars were carried out in an area of cerrado sensu stricto, from July/2003 to June/2004. Caterpillars were more parasitized when occurred on mature leaves. Nola sp. (Noctuiidae) had the highest proportion of parasitism and a negative correlation between their body size and parasitoid attack....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado host plant; Density dependent parasitism; Leaf shelter caterpillars; Plant-insect interactions; Tritrophic interactions; Tropical Lepidoptera.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000300026
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Parasitism of Tuta absoluta in tomato plants by Trichogramma pretiosum Riley in response to host density and plant structures Ciência Rural
Faria,Cristina Arantes; Torres,Jorge Braz; Fernandes,Adriana Maria Vieira; Farias,Angela Maria Isidro.
One important factor determining the efficacy of parasitoids is the way they exploit different host patch. This study evaluated the response of females of Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) to the oviposition sites of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) on processing tomato plants. In fully developed caged tomato plants T. absoluta moths were released, followed by the release of T. pretiosum females 12h later. After 24h of parasitoid release, the moth oviposition sites were mapped according to the plant canopy, and levels of parasitism assessed. The parasitism rate varied from 1.5 to 28%. There was not influence of plant structures on parasitism, except for the absence of parasitism on the plant apex. Levels of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological control; Density dependent parasitism; Tomato leafminer; Egg parasitoid.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000600002
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