Browsing by Author "Padilla Lanchimba, Tamara Alexandra"

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    “Efecto de extractos vegetales como agente de control de pulgón (myzus persicae) y mosca blanca (trialeurodes vaporariorum) en condiciones de laboratorio”
    (Ecuador : Latacunga : Universidad Técnica de Cotopaxi (UTC), 2024-08) Padilla Lanchimba, Tamara Alexandra; Chasi Vizuete, Wiman Paolo
    The aphid and whitefly are considered to be pests of economic importance because of the direct and indirect damage they can cause to crops, affecting productivity and profitability where these pests are present. The present research was carried out in the laboratory of the CAREN faculty of the Technical University of Cotopaxi, campus Salache, with the purpose of evaluating the effect of plant extracts as an agent for controlling aphid (Myzus persicae) and whitefly (Trialeurodes vaporariorum) at two concentrations of 25% and 50%, including control 0%, where six treatments were established for (Myzus persicae) and six treatments for (Trialeurodes vaporariorum), two experiments were carried out in a full-scale (DBCA) design with four repetitions and a factorial arrangement of (A*B), in each treatment the individuals of each species under study were released and the plant extract of (Phytolacca bogotensis K.) and (Ambrosia arborescens). Mortality data were taken every 30 minutes after the application of plant extracts, where the count and extraction of dead individuals was performed as an indicator of the percentage of mortality. The results obtained determined that the extracts of (Phytolacca bogotensis K.) and (Ambrosia arborescens) control aphid (Myzus persicae) and whitefly (Trialeurodes vaporariorum), with an average of 5.12% of the percentage of mortality of the aphid and 5.085% white fly mortality percentage by (Phytolacca bogotensis K.), followed by the extract of (Ambrosia arborescens) with a mortality rate of 4.53% and 5.01% for aphid and whitefly respectively. The best concentration for the application of extracts was 50% with an average mortality rate of 8.34% for aphid, and 8.39% mortality rate in whiteflies. For the interaction between plant extracts and concentrations, (Phytolacca bogotensis K.), at a concentration of 50% obtained the best mortality rate of 8.84% for aphid and 9.02% mortality rate for whitefly.