Borago officinalis · Annual
Slugs and snails: Use physical barriers like copper tape or crushed eggshells, or apply iron phosphate pellets.
Powdery mildew: Improve air circulation, avoid overhead watering, and treat with a sulphur-based fungicide if severe.
Leaf-mining flies: Remove and destroy heavily infested leaves; encourage natural predators like parasitic wasps.
Root rot: Ensure well-drained soil and avoid waterlogging; remove affected plants to prevent spread.
Vine weevil: Apply nematodes to the soil in autumn and spring to control larvae, or use biological controls.