Four more prob­lems that af­fect roses

Garden News (UK) - - The Problem Solver -

Rose rust

Look out for orange or black pus­tules on leaves and stems. Most of the mod­ern roses are re­sis­tant to rust.

Pow­dery mildew

This fun­gal dis­ease tends to be worse in high hu­mid­ity and in plants where air move­ment is poor.

Aphids

Aphids suck sap from leaves and stems and se­crete sticky honey­dew, which en­cour­ages the growth of sooty moulds.

Rose sawfly

The cater­pil­lars of the rose sawfly will eat the leaves of roses, some­times com­pletely de­fo­li­at­ing a plant.

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