Field Notes

Explore Hb’s unusual reproduction, from self-fertilizing founders to internal hatching and the bacterial partners passed to the next generation.

Hb does more than transport bacteria. Discover the immune interference and bacterial switching behind its partnership with Photorhabdus.

A selective-breeding experiment reveals how Hb nematodes respond to a corn-root chemical—and why the plant, pest, and nematode all matter.

Meet Heterorhabditis bacteriophora, the insect-parasitic nematode known as Hb. Explore its discovery, underground hunting, and relationships with grubs.