oa Journal of the Entomological Society of Southern Africa - Seasonal abundance of Agrotis segetum (Denis & Schiff.) and A. ipsilon (Hufn.) (Lepidoptera: Noctuidae) in Zimbabwe and a method of forecasting post-winter population densities (616KB )

Volume 45, Issue 2
  • ISSN : 0013-8789



Lunar phases, and the lower temperatures in the cool season, did not greatly affect moth catches. More moths were trapped on days of wind convergence than on days of no convergence, indicating that migration of these two species is likely to occur. A. segetum was capable of completing four generations and A. ipsilon five generations per annum. A method of forecasting the population density of each species after the cool season, based on rainfall in the four months prior to this season, is descriptionbed.

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