Sobrevivência diferencial de pupas de Euselasia apisaon Dahman (Lepidoptera: Riodinidae) em plantas de sub-bosque nos plantios de Eucalyptus de Belo Oriente, MG / Differential survival of Euselasia apisaon Dahman (lepidoptera: riodinidae) pupae at understorey plants in the Eucalyptus plantations of Belo Oriente, MG, Brazil
Neotrop. entomol
;
39(5): 681-685, Sept.-Oct. 2010. graf
Article
Dans Portugais
| LILACS
| ID: lil-566201
ABSTRACT
Herbivorous insects may attack eucalyptus causing economic losses. One of these pests is the moth Euselasia apisaon Dahman, a key pest in the basin of middle Rio Doce. Here we studied the survival of pupae of this moth in Eucalypts and in understorey plants and tested the hypotheses i) live pupae are more abundant in plants of the understorey than in eucalyptus, ii) there is no difference between the abundance of pupae in different plants of the understorey. We sampled three areas cultivated with eucalyptus in Belo Oriente, MG, and samples were taken in five plots each area, getting five branches of each plant and of five eucalyptus trees that bordered the plot. The proportion of live and dead pupae and the mortality rate were estimated. The abundance of live pupae was higher in the understorey and the mortality rate of pupae was the same among different families of plants of the understorey. It is possible the larger available leaf area of understorey plants justify the greater abundance of live pupae in this habitat, however, avoidance of feeding habitat to finish the life cycle is also a possible explanation. Mortality rate in plants of the understorey points to an equal pressure of natural enemies on the pupae. These appointments help us to understand the dynamics of pests in eucalyptus plantations, providing important information to support actions against pests in natural environments.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Eucalyptus
/
Lepidoptera
Limites du sujet:
Animaux
Pays comme sujet:
Amérique du Sud
/
Brésil
langue:
Portugais
Texte intégral:
Neotrop. entomol
Thème du journal:
Biologie
/
ZOOLOGIA
Année:
2010
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS