Abstract
Free-living nematodes may be attacked and eaten by soil mites which are normally considered fungivores or saprophages. Three species in the genus Tyrophagus, common inhabitants of grassland soils and also common pests in stored products, museums and laboratories, are predators of nematodes. All active stages of the mites will voraciously consume nematodes. When offered nematodes and a choice of other food (baker's yeast and algae), 11% of the Tyrophagus putrescentiae, 23% of the T. zachvatkini, and 56% of the T. similis tested fed on nematodes. Tyrophagus zechvatkini and similis were reared on a diet consisting entirely of nematodes, and developed at rates similar to a fungal diet and produced viable offspring. Agar cultures of Aphelenchus avenae which were inoculated with five mating pairs of Tyrophagus zachvatkini had populations that were one-third less than mite-free controls. Observations indicate that nematodes may be attacked by tyrophagid mites when in a dry, anhydrobiotic state.
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