Evaluación de dos cepas de Beauveria bassiana para el control de Euxesta stigmatias en mazorcas de maíz (Zea mays), bajo condiciones controladas, Campus Salache – Latacunga – Cotopaxi 2022.

One of the pests that causes severe damage to the corn ear is the stigma fly (Euxesta stigmatias). The damage starts from the consumption of styles, the apex of the ear and the developing kernels, reducing yields in the reproductive stage (R3) milky (tender). The purpose of the research was to determine the best strain of Beauveria bassiana and the best concentration for the control of the stigma fly in larval stage, under controlled conditions. The aim was to propose an alternative control to reduce production losses in the reproductive stage (R3) milky (tender). The research was carried out in the Agronomy Laboratory of the Technical University of Cotopaxi, applying an additional AxB+1 factorial arrangement implemented in a DBCA with four replications, where Factor A corresponds to native Beauveria bassiana (coast and sierra) and Factor B corresponds to the concentrations (105, 107, 109 spores/ml), obtaining a total of 28 experimental units with 15 larvae of Euxesta stigmatias per experimental unit. The variables determined were percentage of mortality using Beauveria bassiana and percentage of damaged grains. The results obtained were analyzed in the InfoStat program and after obtaining significant results in the ADEVA, the Tukey test at 5% was performed to obtain the different ranges of significance. The result for the percentage of mortality was determined that treatment three (T3), which corresponds to the application of Beauveria bassiana native sierra at a concentration of 109 spores/ml, reached 100% mortality compared to the additional treatment that did not record dead larvae. With respect to the variable percentage of damaged grains, it was obtained that treatment three (T3) which corresponds to the application of Beauveria bassiana native sierra at a concentration of 109 spores/ml obtained 2.28% of damaged grains compared to the additional (T7) which obtained 10.11% of damaged grains. Therefore, it is concluded that the best strain was Beauveria bassiana native sierra for the control of Euxesta stigmatias larvae, in addition, it was established that the best concentration was 109 spores/ml.

• 1. Verfasser: Caiza Jarrin, Andy Mauricio (author)
• Format: bachelorThesis
• Sprache: spa
• Veröffentlicht: 2022
• Schlagworte: EUXESTA STIGMATIAS; BEAUVERIA BASSIANA; AGRONOMÍA
• Online Zugang: http://repositorio.utc.edu.ec/handle/27000/9449