Reference Report for IND83040758
| Title: | Partial life tables of the green cloverworm (Lepidoptera: Noctuidae) in soybean and a hypothesis of population dynamics in Iowa Plathypena scabra. |
| Authors: | Pedigo, L.P., Bechinski, E.J., Higgins, R.A. |
| Source: | Env. Entomol. 1983, 12(1):186-195 |
| Abstract: | Studies were carried out during the growing seasons of 1977-80 near Ames, Iowa, to investigate the population dynamics in soyabean of Plathypena scabra (F.), a sporadic pest of this crop. Adults and larvae were sampled about 3 times each week, and companion studies allowed for the assessment of populations of predators, parasitism and the incidence of disease. Populations of both endemic and outbreak configurations were observed, and partial life-tables for each of 2 generations were prepared for each year. A graphical analysis of individual mortality factors from the life-tables indicated that attacks by Nomuraea rileyi were important in limiting seasonal density in outbreak years. In endemic years, parasites were a significant factor in containing populations, but during outbreaks, infection with N. rileyi was a much more important factor. A possible explanation of the population configuration of P. scabra in soyabeans is suggested. |
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