Evaluación de dos tipos de Beauveria bassiana para el control de la mosca de los estigmas (Euxesta stigmatias) del cultivo de maíz (Zea mays), bajo condiciones controladas, Salache – Latacunga - Cotopaxi – 2022.
Among the most important pests that attack corn is the stigma fly, which significantly reduces yields up to 90% in the reproductive stage (R3) milky (tender) if adequate control is not carried out. The purpose of the research was to identify the best type of Beauveria bassiana and determine the best...
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| Format: | bachelorThesis |
| Idioma: | spa |
| Publicat: |
2022
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| Accés en línia: | http://repositorio.utc.edu.ec/handle/27000/9436 |
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Afegir etiqueta | Sumari: | Among the most important pests that attack corn is the stigma fly, which significantly reduces yields up to 90% in the reproductive stage (R3) milky (tender) if adequate control is not carried out. The purpose of the research was to identify the best type of Beauveria bassiana and determine the best concentration for the control of the stigma fly in the adult stage, under controlled conditions. This is an alternative to control the insect in order to reduce production losses in the reproductive stage. The research was carried out in the Agronomy Laboratory of the Technical University of Cotopaxi, using an additional AxB+1 factorial arrangement implemented in a DBCA with four replications, where Factor A corresponds to types of Beauveria bassiana (native and commercial) and Factor B to the concentrations (105, 107, 109 spores/ml), obtaining a total of 28 experimental units with 15 insects for each experimental unit. The variables determined were the percentage of mortality and time to control Euxesta stigmatias using Beauveria bassiana. The results obtained were analyzed in the InfoStat program and after obtaining significant results in 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 six (T6), which corresponds to the application of native Beauveria bassiana with a concentration of 109 spores/ml, reached 100% mortality, being the best in comparison with the additional one that did not present dead insects. With respect to the variable time to control the insect, treatment three (T3) which corresponds to the application of commercial Beauveria bassiana with a concentration of 109 spores/ml with an average of 11 days was the best, followed by treatment six (T6) which corresponds to the application of native Beauveria bassiana with a concentration of 109 spores/ml that obtained an average of 13 days. Therefore, it is concluded that the best type was native Beauveria bassiana to control the stigma fly in the adult stage, in addition, the best concentration was 109 spores/ml. |
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