Author:
Gillespie Robert L.,Kemp William P.
Abstract
AbstractSignificant differences in age structure of grasshopper populations [Melanoplus sanguinipes (Fabricius), M. bivittatus (Say), and M. packardii Scudder] occurred in winter wheat and adjacent rangeland. In 1988, age structure differences were associated with density shifts in winter wheat between sample periods suggesting that older instars dispersed into the crop but younger instars remained in rangeland. In 1989 there was some partitioning of age classes between the two habitats, but no pattern emerged as in 1988. In 1990, significantly more older instars were collected in winter wheat than in rangeland. There were shifts in percentage density of the three grasshopper species in winter wheat but again no patterns emerged.
Publisher
Cambridge University Press (CUP)
Subject
Insect Science,Molecular Biology,Physiology,Ecology, Evolution, Behavior and Systematics,Structural Biology
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