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Bt will have no effect on cutworm eggs—only the larvae themselves—as it must be ingested. You could try spraying the eggs with a mixture of equal parts rubbing alcohol and water, which will dry them out. Test this on a single area of the plant before applying it to the whole thing, just to make sure there are no adverse effects. Other potential solutions include insecticidal soaps, neem oil, and compounds containing pyrethrins—all of which should be available at your local hardware store or garden center. Most insecticides target pests after they have already hatched, so you may be better off waiting until the eggs hatch, at which point Bt will be effective.

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