Abstract
Abstract Two trials are described in which the effects of pasture height during the flight period of Wiseana cervinata (Walker) on oviposition, and the effects of post-oviposition treatment of pasture on survival of larvae, were investigated. The difference between numbers of eggs recovered from mown compared with unmown plots was not significant in one trial, but in the second trial numbers of eggs recovered from long pasture were more than double those recovered from short pasture. From maximum natural oviposition rates of 180 eggs per sq ft in one trial and 50 per sq ft in the other, practically no mature larvae developed. This suggests that conditions in the pasture for survival of young larvae may be more important than numbers of eggs laid in determining numbers of mature larvae.
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