Termination of the hypopial stage in Caloglyphus mycophagus (Mégnin) (Acarina: Acaridae)

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Abstract
Termination of the hypopial stage of Caloglyphus mycophagus and transformation to a normal tritonymph is accomplished by a molt. The split produced by this molt occurs on the posterior end of the body. Combinations of temperature, relative humidity, and nutrition regulate hypopial termination. Hypopi can molt only at 15 °C or above. The higher the temperature, the more hypopi transform. Higher relative humidity also may aid termination. More hypopi molt from mites raised on medium of animal origin than of plant origin. Hypopial duration may also be influenced by environmental factors. Higher temperature and media of animal origin result in a shorter hypopial duration.

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