Tylenchus dihystera Tylenchus olaae Tylenchus spiralis Aphelenchus dubius var.

peruensis Helicotylenchus nannus Helicotylenchus crenatus Helicotylenchus punicae Helicotylenchus dihystera (Steiner's spiral nematode) is a plant pathogenic nematode.

It is known to inhabit sugarcane, rice, potatoes, corn, peanut, millet, sorghum, banana and forest trees.

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