Abstract

ABSTRACT The life-cycle of Rhizoglyphus robini (Acari: Acaridae) has been studied under different temperatures. It required 10.6 ± 2.9, 10.1 ± 2, 9.15 ± 3.1, 8.0 ± 1.48 and 14.6 ± 7.7 days to complete the life-cycle when maintained at 15, 20, 25, 30 °C and room temperatures (14-34 °C) respectively. The incubation period of eggs and the developmental period of nymphs were also influenced by different temperatures. Though the males had shorter life span than the females the duration of life, irrespective of sex, was gradually less with the increase of temperatures from 15 ° to 30 °C. The mites also produced gradually a higher number of eggs with the rise of temperature but the length of life and the number of eggs produced by an individual mite were maximum at room temperatures.

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