NemaSeek Pro Hb Beneficial Nematodes - 500 milARBICO Organics line of Heterorhabditis bacteriaphora Beneficial Nematodes PRO are OMRI Listed for use in organic production. They are delivered in a non synthetic wettable powder. The OMRI listed beneficial nematodes can be used by both residential and commercial users. Beneficial Nematodes are live microscopic organisms (non segmented round worms) that occur naturally in soil throughout the world. The beneficial nematodes we sell are parasitic to