If the leaves of your rose have ugly little brown window-pain-like spots, or are getting holes in them, the culprit causing the damage is most likely rose sawfly larvae.

The larvae of the sawfly often hang out on the undersides of leaves, and when they first hatch they’re tiny, green and very hard to see, especially on the low-growing shrub roses.

Rose slugs are the caterpillar-like larvae of a sawfly, a type of primitive stingless wasp. Adult sawflies are thick-waisted, about 1/2-inch long and mostly shiny black.

When the eggs hatch, many larvae called rose slugs emerge and begin feeding on the leaves. The slugs are very small, have soft bodies and look like miniature caterpillars.

A: Sawfly larvae can quickly riddle a rose leaf. The "worms" chew the leaves and leave characteristic holes. Neem oil, spinosad, and insecticidal soap are all good organic means of control. Apply ...

Rose slugs are the larvae of a sawfly. The larvae look like light-green caterpillars, but they are actually maggots. They feed on the soft leaf tissue between the veins on the undersides of the ...

The bristly rose slug is the most common rose slug in California and is the larva of a sawfly. Larvae are pale green or yellowish green with a brown head and tiny, hairlike bristles.

Spray for rose slug in spring as soon as the rose is in full leaf. At this time the larvae hatch from eggs laid in the soil under the plants and climb to the leaves. Spray again if you see damage.

These are the larvae of the Rose Sawfly, and they eat holes in your rose leaves. Two methods of control are an insecticide like imidacloprid, or neem oil, which is effective in targeting immature ...

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Rose slug, a sawfly larva (Hymenoptera), on underside of rose (Rosa) leaf Q • My rose leaves have brown patches on them ...

A: Sawfly larvae can quickly riddle a rose leaf. The “worms” chew the leaves and leave characteristic holes. Neem oil, spinosad, and insecticidal soap are all good organic means of control ...