While neem oil won't generally kill cutworms, it does have a beneficial property: it coats the eggs and makes them less likely to hatch. If you're waiting impatiently for another product to arrive and have neem oil around, it can at least slow impending outbreaks of cutworms a little bit.

What kills cutworms naturally?

Releasing nematodes that feed on cutworms in the soil is another natural biological control option, according to Holmes. You can also spread DE (diatomaceous earth), a natural powder that is made up of razor-sharp particles that will kill the larvae.

What insecticide kills cutworms?

Using pesticides

It is best to apply product in the evening, before the cutworms come out for feeding. Examples of common pesticides effective against cutworms are carbaryl, cyfluthrin and permethrin.