Abstract
Highlight: A field-cage study was conducted in 1973 and 1974 to determine the amount of forage (mainly grasses) destroyed by different population densities of the grasshopper Aulocara elliotti. The amount offorage consumed during the third instar and through the adult stage averaged 34.5 mg offorage per grasshopper per day. Thus, an estimated loss of 23.1 lb offorage per acre will resultfrom a density of one Aulocara/m2 if the grasshopper lives for 75 days (45 days as a nymph and 30 days as an adult). Based on total available forage (standing dead and new growth), a 63% forage loss was recorded in 1973 at one site and losses of 26% and 29% at two sites in 1974 resulting from about 20 grasshoppers/iM2. Severe grazing by grasshoppers also resulted in reduced production offorage during the subsequent (1974) season.
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