Evaluación de métodos de muestreo y dinámica poblacional de mosca blanca (Trialeurodes vaporarium) en invernadero para tomate (Lycopersicum esculentum), en el cantón Riobamba

Abstract

This research proposes: to evaluate three methods of sampling and to study the population dynamics of whitefly (Trialeurodes vaporariorum), in greenhouses for tomato (Lycopersicum sculentum) in the canton Riobamba; being the factors of study in three methods of sampling and the stages of the insect; The DCA design was a completely randomized, of factorial structure design with 17 replicates (greenhouses) and 51 experimental units. The 17 greenhouses were monitored for 20 weeks with kidney tomato plants in different phenological stages. As a result, the best sampling method for adult individuals is the yellow plastic, while the worst is the yellow plate, for the sampling of nymphs and eggs the best method of sampling is the collection of leaves. Population dynamics are influenced by variables such as amount of irrigation, better irrigation coincides with a decrease in population; good weed control helps to decrease counts as whitefly hosts decrease; the counts descends when performing pruning (deschuponado and aparunte) because they eliminates zones of ovoposition and feeding; Phytosanitary controls contribute to lower populations when used correctly; the white fly counts are also influenced by the phenological stage of the crop and it has had to show less infestation during the initial stage than during the fattening stage. It was determined that the best sampling method for adults was yellow plastic, while for the monitoring of the other stages it was leaf collection. Within the associated entomafauna several orders could be found as well as families within which parasitic insects could be found, as well as predatory insects, which well managed will contribute to a less invasive control and would guard the ecological balance. Keywords: WHITE FLY - METHODS OF SAMPLING - POPULATION DYNAMICS.