Effect of irrigation regimes and plant populations on greenbug (Homoptera : Aphididae) abundance in grain sorghum
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In a three-year study (1998-2000), we determined the effect of evapotranspiration-based irrigation regimes and plant population density on peak greenbug abundance in grain sorghum. Although yearly temperatures, total precipitation and seasonal distribution of precipitation varied greatly, when peak greenbug abundances were compared within an irrigation regime across plant population levels, peak densities generally decreased significantly (p=0.05) as plant populations increased. When peak greenbug abundances were compared within a plant population across irrigation regimes, peak greenbug abundances either increased significantly (p=0.05) as irrigation levels increased or were not significantly different. Our results compared favorably to previous research which examined sorghum plant density and canopy coverage.
author list (cited authors)
Michels, G. J., Rush, C. M., Piccinni, G., Owings, D. A., & Jones, D.