Lily Beetles: These pests attack lilies. They are bright red in colour and are around 8mm long. Their orangey-brown excrement coated larvae devour both foliage and flowers.

Lily beetles and their larvae can be removed from plants by hand.

Gladioulus Thrips: These insects attack Gladioli and are around 2mm long with narrow bodies. They are black or the pale yellow and hide in flower buds or under leaf bases. Their presence is indicated by mottled, white/discoloured foliage and white flecks on petals.

These pests can be controlled by spraying the plants with a systemic insecticide, thiacloprid or acetamiprid.


Viruses: Viruses affect cannas, dahlias and gladioli, causing reduced vigour, chlorosis, necrosis and malformations. Destroy any affected plants and wash your hands and tools to limit the chance of the virus spreading.

Lily disease: This disease is a fungal leaf blight. Ellipical, water-soaked leaf spots may spread to stems and flowers. Plant these on a well-drained site to help ventilation. Cut off any spotted leaves you find.

Grey mould: This is fairly common in wet seasons. Grey, fuzzy fungal growth appears on stems and flowers. Remove diseased plants and plant debris and avoid overcrowding the plants.

Smuts: These can cause problems for dahlias. Leaf spots with yellow margins appear. Dispose of any diseased foliage and remove leaves before storing tubers.

Having Pests and Diseases in your garden is the last thing you want so we hope the information provide in this article is helpful. If you need more information on any pests or disease that are affecting your garden, or on how to deal with them then please contact us.