Effect of cold storage on egg hatching in two reduviid predators Rhynocoris marginatus Fab. and Rhynocoris fuscipes Fab. (Hemiptera Reduviidae)
2001
Sahayaraj, K. | Paulraj, M.G. (St. Xavier's college, Tamil Nadu (India). Zoology dept.)
The effect of cold storage on egg hatching in Rhynocoris marginatus Fab. and Rhynocoris fuscipes Fab. (Hemiptera : Reduviidae) was determined at two different temperatures, i.e., 14 and 20øC, for different periods of storage namely 1, 2, 4, 8 and 12 days. For both reduviids, no hatching was observed at 14øC. Eggs of Rhynocoris fuscipes were not suitable for storage at 20øC either, but Rhynocoris marginatus eggs could be stored for up to 4 days without any nymphal mortality and minimum abnormalities in nymphs. However, storage for 8 days or more affected Rhynocoris marginatus egg hatching and nymphal survival considerably. In a control 99/ hatching was observed for R. fuscipes whereas it was 90/ for R. marginatus. Cold storage at 20øC extended the incubation period in both reduviids.
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