title: Degree-day requirements for eight economically important grasshoppers (Orthoptera: Acrididae) in Nebraska using field data.
abstract: The timing of application for the management of rangeland grasshoppers (Orthoptera: Acrididae) is critical, especially as insecticides become more specialized and the use of Insect Growth Regulators becomes more widespread. The general seasonal occurrence of adults of many grasshopper species has been well documented; however, their appearance varies widely between years. We analyzed sweep samples collected over the western two thirds of Nebraska from a 3-yr period and noted the occurrence of adults by region for eight species of rangeland grasshoppers. We analyzed occurrence based on degree-day accumulations for the region and developed estimates of degree-day requirements for these species. Because these grasshopper species are common rangeland pests, degree-day requirements to reach adulthood should improve the effectiveness of grasshopper treatment programs over a large geographic area.
authors.affiliation: Department of Biology, Chadron State College, 1000 Main St., Chadron, NE 69337.
authors.forename: Mathew L
authors.initials: ML
authors.lastname: Brust
authors.forename: W Wyatt
authors.initials: WW
authors.lastname: Hoback
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Wright
mesh_terms: D000818:Animals; D006110:Grasshoppers / Q000254:growth & development / Q000502:physiology*; D009329:Nebraska; D010507:Periodicity; D013045:Species Specificity; D013696:Temperature; D013997:Time Factors