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Nematode Captured by the Constricting Ring of Drechslerella Click here to find out how the constricting ring works.

The conidia of Drechslerella dactyloides can germinate directly to produce a constricting ring trapping device.    Trapping devices produced directly from conidia are common in nematode predators and are often referred to as 'conidial traps'.   Here a ring has constricted around the body of a nematode that has entered the ring.   Two of the ring cells have germinated, penetrated through the cuticle of the nematode victim and produced germ tubes inside the body.   These initiate the assimilative hyphal system that  digests and absorbs the contents of the host.   The generic name Drechslerella is now favoured for all the predatory Hyphomycetes that capture nematodes using the constricting ring device. Previously this fungus was classified as an Arthrobotrys species (Arthrobotrys dactyloides) based on its two-celled conidium.

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