title: Species Composition and Abundance of Stink Bugs (Hemiptera: Heteroptera: Pentatomidae) in Minnesota Field Corn.
abstract: In response to concerns of increasing significance of stink bugs (Hemiptera: Heteroptera: Pentatomidae) in northern states, a survey was conducted over 2 yr in Minnesota to characterize the Pentatomidae associated with field corn, Zea mays L. Halyomorpha halys (Stål), an exotic species, was not detected in this survey, despite continued detection of this species as an invader of human-made structures in Minnesota. Five species of Pentatomidae (four herbivorous; one predatory) were collected from corn. Across years, Euschistus variolarius (Palisot de Beauvois) and Euschistus servus euschistoides (Vollenhoven) had the greatest relative abundances and frequencies of detection. In 2012, the abundance of herbivorous species exceeded 25 nymphs and adults per 100 plants (i.e., an economic threshold) in 0.48% of fields. However, the abundance of herbivorous species did not reach economic levels in any fields sampled in 2013. The frequency of detection of herbivorous species and ratio of nymphs to adults was highest during reproductive growth stages of corn. The predator species, Podisus maculiventris (Say), was detected in 0 to 0.32% of fields. These results provide baseline information on the species composition and abundance of Pentatomidae in Minnesota field corn, which will be necessary for documentation of changes to this fauna as a result of the invasion of H. halys and to determine if some native species continue to increase in abundance in field crops.
authors: Department of Entomology, University of Minnesota, 1980 Folwell Avenue, Saint Paul, MN 55108. koch0125@umn.edu.
authors: Robert L
authors: RL
authors: Koch
authors: Minnesota Department of Agriculture, 625 Robert Street North, Saint Paul, MN 55155.
authors: Tiffany
authors: T
authors: Pahs
mesh_terms: D000818:Animals; D044822:Biodiversity; D005260:Female; D020387:Food Chain; D020062:Heteroptera / Q000254:growth & development / Q000502:physiology*; D008297:Male; D008910:Minnesota; D009758:Nymph / Q000254:growth & development / Q000502:physiology; D011156:Population Density; D003313:Zea mays / Q000502:physiology*
keywords: Euschistus servus euschistoides; Euschistus variolarius; Zea mays