Environmental Entomology (1996) 25, 1158-1166

J.R. Fisher, W.P. Kemp and F.B. Pierson (1996)
Aulocara elliotti (Orthoptera: Acrididae): Diapause termination, postdiapause development, and prediction of hatch
Environmental Entomology 25 (5), 1158-1166
Abstract: Diapause termination, postdiapause duration, and field hatch of the bigheaded grasshopper, Aulocara elliotti (Thomas), were studied in southwest Montana during a 3-yr period. In general, >70% of the sampled population had completed diapause by mid-November each year. Postdiapause embryonic developmental rates were obtained from a function fitted to hatch versus time data collected at constant temperatures ranging from 15 to 42°C. The population model design system was used to predict hatch at 2 sites in southwestern Montana for 3 yr. First-instar occurrence was monitored by sweep net samples and used to assess the accuracy of the predictions. When simulated hatch was compared with field occurrence of 1st instars, the 50% occurrence dates were very similar (within 2.2 ± 1.1 d for all 5 comparisons). The results of our investigations should enhance the ability of decision support systems for grasshopper management to provide forecasts to land managers and pest advisors.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): James R. Fisher

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aulocara elliotti		U.S.A. (NW)