Artículo
The Role of Rainfall in Sternechus subsignatus (Coleoptera: Curculionidae) Adult Emergence from the Soil after Its Winter Dormant Period
Socías, María Guillermina
; Van Nieuwenhove, Guido Alejandro
; Casmuz, Augusto Sebastián; Willink, Eduardo; Liljesthrom, Gerardo Gustavo
Fecha de publicación:
08/2016
Editorial:
Entomological Society of America
Revista:
Environmental Entomology
ISSN:
0046-225X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this work, we report the effect of rainfall on Sternechus subsignatus Boheman, 1836, adult emergence after winter dormancy. This weevil is a univoltine soybean pest found in northwestern Argentina, a subtropical region with dry winters and rainy summers. Before harvest, fully grown larvae burrow into the soil where they overwinter. In the spring, they emerge as adults and recolonize the crop during its planting and early vegetative stages. Our study examines the seasonal timing of adult emergence with the aim of improving chemical control strategies and avoiding unnecessary pesticide applications. To do so, we developed a regression model to predict adult emergence onset as a function of cumulated rainfall after 1st November. The regression with the highest coefficient of determination between cumulated rainfall and adult emergence onset was Emergence onset (Julian day) = 7.98 Ln(cumulative rainfall) + 65.7. The negative relationship showed that adults emerged earlier in wet years than in dry years. Also it was observed that adults emerged from late November to mid-March, in pulses following periods of rainfall. Males were more abundant than females at first, but then the reverse was true toward the end of the period. In most cases, there was a suggestion of relationship (though not significantly) between peaks of adult emergence with peaks of rainfall 15 d before adult emergence. These results reveal that rainfall has a significant impact on the beginning and dynamics of adult emergence from the soil.
Palabras clave:
Postdormancy Emergence
,
Predictive Model
,
Soybean Pest
,
Water Threshold
,
Weevil
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CEPAVE)
Articulos de CENTRO DE EST.PARASITOL.Y DE VECTORES (I)
Articulos de CENTRO DE EST.PARASITOL.Y DE VECTORES (I)
Citación
Socías, María Guillermina; Van Nieuwenhove, Guido Alejandro; Casmuz, Augusto Sebastián; Willink, Eduardo; Liljesthrom, Gerardo Gustavo; The Role of Rainfall in Sternechus subsignatus (Coleoptera: Curculionidae) Adult Emergence from the Soil after Its Winter Dormant Period; Entomological Society of America; Environmental Entomology; 45; 4; 8-2016; 1049-1057
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