Identification and distribution of whiteflies (Hemiptera: Aleyrodidae) in tomato crops (Solanum lycopersicum) in Cundinamarca (Colombia)

The main purpose of this study was to determine the presence, distribution and characterization of whiteflies in thirteen tomato-crop producing municipalities in Cundinamarca (Colombia).Immature stages were collected and taken to the laboratory until adults emerged in order to establish their taxonomic identification.The mitochondrial regions were

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A Constructive Method and a Guided Hybrid GRASP for the Capacitated Multi-Source Weber Problem in the Presence of Fixed Cost

This paper presents a new variant of the capacitated multi-source Weber Tracksuit problem that introduces fixed costs for opening facilities.Three types of fixed costs are considered and experimented upon.A guided constructive heuristic scheme based on the concept of restricted regions and a greedy randomized adaptive search procedure (GRASP) are p

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