Utilização de extratos aquosos de Annona squamosa e Azadirachta indica no manejo de fitonematoides em mudas de bananeira

Abstract

Among the constraints affecting banana crop and causing production losses are the plant-parasitic nematodes. The dispersion of these pathogens occurs mainly through the propagating material. The objective of the present work was to evaluate the effect of neem (Azadirachta indica) and sugar apple (Annona squamosa) aqueous leaf extracts in the treatment of banana plantlets naturally infected by phytonematodes, under greenhouse conditions. Four dosages of the two extracts were tested, in addition to the controls (Carbofuran and water); and immersion period of plantlets of 60 minutes. A completely randomized design in a factorial scheme (2x4) with eight replications was used. The experiment was evaluated three months after treatments were applied, observing the sprouting percentage of the seedlings, the nematode’s population in the soil, rhizome and roots, and the reproduction factor. A reduction of the final population in the soil, root and rhizome and reproduction factor was observed in the plantlets treated with neem, and sugar apple extracts when compared to the negative control (water).