Soil and root pests

Some pests never show up on the leaves. Fungus gnats, root aphids, grubs, wireworms, weevil larvae, symphylans and seedcorn maggots work in soil, pots or mulch and often hit roots and young seedlings first. Each guide explains what the pest looks like, which visitors are harmless recyclers, like springtails and pill bugs, and how growers check the root zone and stop a problem early.

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