RESUMEN
Se evaluó la capacidad del caracol Oxystyla
pulchella Spix, (Gastropoda: Bulimullidae) para de remoción de algas, líquenes y
hongos que crecen sobre los troncos, ramas, hojas y frutos de árboles de naranja (Citrus
sinensis L) Osbeck, variedad Pera en el estado de Bahía, Brasil. La capacidad de
remoción fue evaluada mediante dos metodologías: para troncos y ramas se utilizaron seis
tratamientos (0, 10, 20, 40, 80 caracoles por árbol y un testigo absoluto, que consistió
en la limpieza mecánica) y para hojas y frutos se adoptaron los mismos tratamientos que
en los troncos y ramas, excepto el testigo absoluto. Se uso un diseño experimental
completamente al azar, con seis repeticiones. En la remoción de los organismos
epifíticos de hojas y frutos no hubo diferencias significativas entre las densidades de
caracoles, excepto con el testigo. La limpieza de troncos y ramas, en los tratamientos con
40 y 80 caracoles fue de 29% y 17%, respectivamente, siendo los valores más altos.
Palabras clave: Citrus sinensis, Oxystyla
pulchella, Control biológico, Caracoles, Organismos epifíticos, Manejo Integrado de
Plagas. |
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ABSTRACT
Removal of epiphytic organisms from Citrus
sinensis by the snail Oxystyla pulchella. The ability of the snail O. pulchella
(Gastropoda: Bulimullidae) to remove algae, lichens and fungi that grow on the trunks,
branches, leaves and fruits of orange trees (C. sinensis L) Osbeck, variety Pera,
in the state of Bahía, Brasil was evaluated. The removal capability was evaluated using
two methodologies: for trunks and branches six treatments (0, 10, 20, 40 and 80 snails per
tree and an absolute control that consisted of mechanical cleaning) were utilised and for
leaves and fruits the same treatments were selected except for the absolute control. A
completely randomised experimental design with six repetitions was used. In removal of
epiphytic organisms from the leaves and fruits there were no significant differences
between the densities of snails, except in the control. In the cleaning of trunks and
branches, the treatments with 40 and 80 snails reached 29% and 17% respectively, without
significant differences between them, but with when compared to the other treatments.
Key words: Citrus sinensis, Oxystyla
pulchella, Biological control, Snail, Epiphytic organisms, Integrated Pest
Management. |