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This video clip shows Ring nematodes seeking and feeding on the roots of Kentucky blue grass grown in agar medium. These nematodes congregate around the tips of lateral roots. They stay outside of the roots and insert a hollow needle-like apparatus, called stylet, inside the root and start a pumping action to withdraw root sap. A median valve pump-like action is instrumental for this activity. The pumping action of the median valve is highlighted toward the end of the video. For this video the sequences were videotaped through a compound microscope.