Location: Crop Protection and Management ResearchTitle: Southeastern USA regional landscape patterns and population dynamics of the stink bug, Euchistus servus Author
|Prescott, Kristina - University Of Minnesota|
|Zeilinger, Adam - University Of California|
|Hou, S - Harvard University|
|Ruberson, John - Kansas State University|
|Andow, David - University Of Minnesota|
Submitted to: International Congress of Entomology
Publication Type: Abstract Only
Publication Acceptance Date: 2/22/2016
Publication Date: 9/26/2016
Citation: Olson, D.M., Prescott, K., Zeilinger, A., Hou, S., Coffin, A.W., Smith, C.M., Ruberson, J., Andow, D. 2016. Southeastern USA regional landscape patterns and population dynamics of the stink bug, Euchistus servus [abstract]. International Congress of Entomology.
Technical Abstract: Introduction: The brown stink bug, Euschistus servus is an economically important pest of many agronomic crops in the southern USA, motivating the study of factors influencing population build-up in agricultural regions and landscapes to facilitate management. Methods: ArcGIS was used to characterize the proportion of land-use types and connectivity of host cropland within landscapes in two regions of southern Georgia and related to local estimates on the finite rate of population increase (') of E. servus. Estimates of ' as well as densities of predatory fire ants and Geocoris spp. were obtained in four major crop hosts—maize, peanut, cotton and soybean—over three years. The area under the colonist-incidence curve (Ac) and the progeny-incidence curve (Ap) was calculated and 'was estimated as a ratio of these two (Ap/Ac). Regression analysis was used to predict ' as a linear function of landscape characteristics and predator density. Results/Conclusion: Fire ant density within crop fields was negatively related to '. There was a positive relationship between ' and the proportion of maize and peanut in the landscape. There was a negative relationship between ' and the proportion of cotton and soybean in the landscape. The proportion of woodland and pasture, perimeter to area ratio of cropland, proportions of non-crop hosts in the woodland adjacent to the sampling site and mean distance to crops from the sampled site had no influence on '. Euchistus servus reproduction was negatively influenced by the SW region and peanut crops overall. Implications for the management of E. servus populations are discussed.