Avaliação da incidência das pragas de três fruteiras nativas na região de Maputo

Abstract

This work summarizes the investigations carried out from September 2002 to December 2003 in the districts of Matutuíne, Namaacha, Marracuene and Manhiça, in Maputo province, southern Mozambique, with the aim of identifying pests that attack three native fruit trees, namely, Annona senegalensis pers ( annonaceae), Vangueria infausta Burch (Rubiaceae) and Garcinia Ilvigstonel T. Anders (Clusiaceae) with the purpose of carrying out an ecological study of the respective pests. Three random plots of 30mx30m were established in each of the studied didctrites where there was spontaneous occurrence of one of the three species of native fruit trees. A total of eight pest species were found, of which six are pests and two species are defoliators. Of these insects, six species were pests of Annona senegalensis, three of Vangueria infausta and two of Garcinia livingstonei. Araecerus sp. it was the most abundant insect species with about 34% of individuals found. The defoliating pest of Vangueria infausta has as its natural enemy the fungus Verticillium sp. in the larval stage. Mortality attributed to this fungus is around 70% of larvae. The district of Marracuene was the only one that showed significant differences at the level of significance of 5% in relation to the other districts.