| Autor: |
Ramos RDS; Postgraduate Program in Agricultural Sciences, State University of Paraíba, Campina Grande 58429-500, PB, Brazil., Silva CADD; Postgraduate Program in Agricultural Sciences, State University of Paraíba, Campina Grande 58429-500, PB, Brazil.; Entomology Laboratory, Embrapa Cotton, Campina Grande 58428-095, PB, Brazil., Lima TA; Postgraduate Program in Agricultural Sciences, State University of Paraíba, Campina Grande 58429-500, PB, Brazil., Albuquerque Junior PS; Postgraduate Program in Agricultural Sciences, State University of Paraíba, Campina Grande 58429-500, PB, Brazil., Castellani MA; Department of Crop Science and Animal Science, State University of Southwestern Bahia, Vitória da Conquista 45083-300, BA, Brazil., Serrão JE; Department of Biology, Federal University of Viçosa, Viçosa 36570-900, MG, Brazil., Zanuncio JC; Department of Entomology/BIOAGRO, Federal University of Viçosa, Viçosa 36570-900, MG, Brazil. |
| Abstrakt: |
The polyphagy of Spodoptera frugiperda (Lepidoptera: Noctuidae) renders its control difficult because variations in the phenology of host plants grown in different seasons of the year and near each other can facilitate the movement of this pest between crops. The objective of this work was to examine certain biological characteristics of S. frugiperda fed on an artificial diet or on cotton, castor bean, or corn leaves. The experimental design was in randomized blocks, with four treatments represented by S. frugiperda caterpillars fed an artificial diet (T1) or pieces of cotton (T2), castor bean (T3) or corn (T4) leaves with five replications (five caterpillars per replication). The duration and survival of the egg, larva, pre-pupa, pupa and egg-adult period and the reproductive characteristics of this insect were determined. The survival, development and reproduction data of S. frugiperda originated from individuals reared with cotton and castor bean leaves were lower than those fed on corn leaves or an artificial diet. The number of nonviable eggs laid by females originated from caterpillars fed on castor bean leaves was higher than those fed on cotton and corn leaves or an artificial diet. The very higher number of unviable S. frugiperda eggs resulting from castor leaves can reduce outbreaks of this pest in cotton and corn crops after the cultivation of that plant, or by intercropping with this plant, in the main producing regions of Brazil. |
