Predators of Diaprepes abbreviatus (Coleoptera: Curculionidae) larvae [Sugarcane rootstalk borer weevil, Florida]

Larvae of Diaprepes abbreviatus (L.) in petri dishes were susceptible to predation on the soil surface in a citrus grove. An average of 47% were removed by predators in the first 20 minutes in a 1979 study to determine rates of predation. Predators (2,613 recorded events) were exclusively ants in th...

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Veröffentlicht in:The Florida entomologist 1982-01, Vol.65 (1), p.150-158
Hauptverfasser: Whitcomb, W. H., Gowan, T. Dave, Buren, W. F.
Format: Artikel
Sprache:eng
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Zusammenfassung:Larvae of Diaprepes abbreviatus (L.) in petri dishes were susceptible to predation on the soil surface in a citrus grove. An average of 47% were removed by predators in the first 20 minutes in a 1979 study to determine rates of predation. Predators (2,613 recorded events) were exclusively ants in the grove studied, with the exceptions of 2 predation events by the spider Corythalia canosa Walckenaer (Salticidae) and 3 by Labidura sp. earwig juveniles. Of the 9 observed ant predator species, Tetramorium simillimum Roger, Paratrechina bourbonica (Forel), Pheidole floridana Emery, and Pheidole dentata Mayr were considered important because of their consistency in rates and presence in predation on Diaprepes larvae. Two other species, Solenopsis invicta Buren and Pheidole morrisi Forel, were found commonly. Predation rates by the various species differed over the course of the summer and with the time of day. /// Las larvas de Diaprepes abbreviatus (L.) en cajas de Petri puestas sobre la superficie de la tierra en un naranjal fueron susceptibles a la rapacidad de predadores. Un promedio de 47% de ellas fueron removidas por predadores en los primeros 20 minutos. Los predadores (2613 casos reportados) consistieron exclusivamente de hormigas en el naranjal estudiado, con la excepcion de 2 casos de rapacidad por una araña, Corythalia canosa Walckenaer (Salticidae), y 3 casos por tijeretas juveniles de la especie Labidura. De las 9 especies de hormigas predadoras, Tetramorium simillimum Roger. Paratrechina bourbonica (Forel), Pheidole floridana Emery, y Pheidole dentata Mayr, fueron consideradas importantes debido a sus proporciones y su presencia en la rapacidad de larvas de Diaprepes. Dos otras especies, Solenopsis invicta Buren y Pheidole morrisi Forel, fueron descubiertas con poca frequencia. La proporción de rapacidad cometida por las diferentes especies varió segun el progreso del verano y de acuerdo con la hora del día.
ISSN:0015-4040
1938-5102
DOI:10.2307/3494155