MANDIBULAR MORPHOLOGY OF SOME FLORIDIAN GRASSHOPPERS (ORTHOPTERA: ACRIDIDAE)

Immersion Tolerance in Rangeland Grasshoppers (Orthoptera: Acrididae)

Host Selection by Grasshoppers (orthoptera: Acrididae) Inhabiting Semi-aquatic Environments

Through laboratory choice tests involving 19 plant species, we assessed the host selection behavior of six grasshopper species: Stenacris vitreipennis (Marschall) (glassywinged toothpick grasshopper), Leptysma marginicollis (Serville) (cattail toothpick grasshopper), Gymnoscirtetes pusillus Scudder (little wingless grasshopper), Paroxya clavuliger (Serville) (olivegreen swamp grasshopper), Paro...

PLANTÐINSECT INTERACTIONS Host Preferences and Habitat Associations of Some Florida Grasshoppers (Orthoptera: Acrididae)

Host-plant preferences were assessed by Þeldmeasurement of grasshopper abundance in relation to measurements of ßoral community and by laboratory host-plant preferences. Correlations between grasshoppers and plants (biomass and percentage cover) were based on data gathered at 29 study sites in Þve distinct Florida habitats (including disturbed, freshwater marsh, high pine, oak hammock, and swam...

The Fate of Nosema locustae (Microsporida: Nosematidae) in Argentine Grasshoppers (Orthoptera: Acrididae)

Surveys to detectNosema locustae, amicrosporidian pathogen of orthopterans introduced in Argentina several times from1978 to 1982 to control pest grasshoppers, were conducted during the 1994 and 1995 seasons at locations in Buenos Aires and La Pampa provinces. A total of 7535 grasshoppers collected from 13 different siteswere examined. Infected grasshopperswere found at 4 of the sites, 2 of the...

Embryonic developmental rates of northern grasshoppers (Orthoptera: Acrididae): implications for climate change and habitat management.

Accurate models of temperature-dependent embryonic developmental rates are important to assess the effects of a changing climate on insect life cycles and to suggest methods of population management by habitat manipulation. Embryonic development determines the life cycle of many species of grasshoppers, which, in cold climates, spend two winters in the egg stage. Increasing temperatures associa...