Examinando por Autor "Benavides, Pablo"

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  • Miniatura
    PublicaciónAcceso abierto
    Predatory capacity of Cathartus quadricollis and Ahasverus advena (Coleoptera: Silvanidae) on Hypothenemus hampei (Coleoptera: Curculionidae) under laboratory conditions.
    (Universidad del Valle, 2018-12-31) Laiton J., Laura A.; Constantino, Luis Miguel; Benavides, Pablo; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle; Montoya Lerma, James
    The coffee berry borer (CBB) causes economic damage and quality deterioration of coffee. CBB reproduces inside the fruit that remain after harvesting. In Colombia, native predators have been reported attacking this pest, among them the coleopterans Ahasverus advena and Cathartus quadricollis. This study, which was carried out under lab conditions at Cenicafé, was evaluated the predation of these species on CBB. Adults and larvae of the two predator species were released in ratios of 1, 3 and 5 per infested coffee bean (the treatments) in four independent bioassays. The decrease in CBB populations inside the beans after establishing treatments (the response variables) was determined. The Experimental Units consisted of 10 infested coffee grains observed over 18 days with three infesting holes inside a glass container where the four treatments were applied under a completely randomized design with ten replicates. An absolute control without predators was used for each bioassay. A. advena adults and larvae significantly decreased CBB up to 63.2 % and 42.3 % with respect to the control, presenting a higher predation capacity when three predators per grain were released. In addition, C. quadricollis decreased CBB population up to 46.2 % and 69 % when three adults and five larvae per grain were released, respectively.
  • Miniatura
    PublicaciónAcceso abierto
    Scale insects (Hemiptera: Coccomorpha) in coffee roots of Norte de Santander and Valle del Cauca, Colombia, and description of a new species.
    (Universidad del Valle, 2018-07-08) Caballero, Alejandro; Ramos Portilla, Andrea Amalia; Gil, Zulma Nancy; Benavides, Pablo; Sociedad Colombiana de Entomología - Socolen; Universidad del Valle; Montoya Lerma, James
    Currently, the hypogeal scale insects (Hemiptera: Coccomorpha) are the second most important problem pest arthropods for Colombian coffee crops. In order to develop integrated pest management programs, it is necessary to identify the species associated with this crop. In this study, 768 specimens from 85 samples collected from coffee roots in Norte de Santander and Valle del Cauca were analyzed. Ten genera belonging to four families were identified. Puto barberi, Toumeyella coffeae and Dysmicoccus varius were the most recurrent species. Dysmicoccus mackenziei, Dysmicoccus radicis and Mixorthezia minima are recorded for first time in Colombia. Coffea arabica is reported to be a new host for Phenacoccus solani and a new species of the genus Pseudorhizoecus is described.