Q: Is there a way to control nematodes that may be affecting my hosta plants? I have 128 different varieties and some of them seem to have some of the symptoms. I am not sure if that is the actual problem or not.

A: Nematodes are microscopic roundworms. There are many kinds. Some feed on fungi, some on the outside of plant roots, some are inside of plants and some are predators that feed on insects or on other nematodes. They are part of the invisible community that is part of every so ...

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