Bristly rose slug larva and damage on rose. ... Realize that although these insects look superficially like caterpillars they are sawfly larvae, and Bacillus thuringiensis kurstaki will not be effective against them. Acephate (Orthene), bifenthrin (Talstar), carbaryl (Sevin), and cyfluthrin (Tempo) are effective.

What insecticide kills rose slugs?

If needed, treat heavy rose slug infestations by spraying an insecticidal soap or spinosad, making sure to coat both sides of leaves. Insecticidal soaps kill only the rose slugs it comes in direct contact with while spinosad must be injested by the insect.

Is Sevin safe for roses?

Sevin® Sulfur Dust can be used as a dust or spray and does not harm plants or blooms on listed plants, including roses, flowers, citrus trees, fruits, vegetables, shrubs, and trees.