Distribución Espacial del Escarabajo de la Raíz del Maíz Diabrotica speciosa (Coleoptera: Chrysomelidae) en Cultivos de Maíz

Autores/as

DOI:

https://doi.org/10.33448/rsd-v14i11.50078

Palabras clave:

Distribución de probabilidad, Binomial negativa, Muestreo, Maíz Bt, Patrón de dispersión.

Resumen

Para desarrollar un plan de muestreo secuencial basado en las directrices del Manejo Integrado de Plagas (MIP), es importante conocer la distribución espacial de la plaga en cuestión. El escarabajo de la raíz del maíz Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) es una plaga significativa en los cultivos de maíz (Zea mays L.) en Brasil. El objetivo del presente estudio fue recopilar datos sobre el modelo de distribución de los adultos de D. speciosa en campos de maíz Bt y no-Bt. Las muestras se recolectaron en seis áreas experimentales de 250 m² cada una, durante los años 2012 y 2013. Cada área se dividió en 100 parcelas de 25 m² (5 × 5 m). La unidad de muestreo consistió en cinco plantas seleccionadas al azar en cada parcela, totalizando 500 plantas por campo. El número de adultos de D. speciosa se contó semanalmente, totalizando entre cinco y siete muestreos por campo. El índice de dispersión (varianza/media; índice de Morisita y el exponente de la binomial negativa K) y la prueba de ji-cuadrado entre los valores observados y esperados para las distribuciones teóricas (Poisson, binomial negativa y binomial positiva) mostraron que, independientemente del cultivar, los adultos de D. speciosa presentaron un patrón de distribución agregada, ajustándose al modelo binomial negativo.

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Publicado

2025-11-29

Número

Sección

Ciencias Agrarias y Biológicas

Cómo citar

Distribución Espacial del Escarabajo de la Raíz del Maíz Diabrotica speciosa (Coleoptera: Chrysomelidae) en Cultivos de Maíz. Research, Society and Development, [S. l.], v. 14, n. 11, p. e238141150078, 2025. DOI: 10.33448/rsd-v14i11.50078. Disponível em: https://rsdjournal.org/rsd/article/view/50078. Acesso em: 5 dec. 2025.