Pesticide control The RHS believes that avoiding pests, diseases and weeds by good practice in cultivation methods, cultivar selection, garden hygiene and encouraging or introducing natural enemies, should be the first line of control. One product is sold as a repellent against lily beetle, Grazers G4.The lily 'Defender Pink' is advertised as lily beetle tolerant.There are three species of parasitoid wasp known to occur in Britain that feed only within the larvae of lily beetle ( Lemophagus errabundus, Tetrastichus setifer and Mesochorus lilioceriphilus). Encourage wildlife in the garden, such as birds, frogs, wasps and predatory ground beetles who will eat the larvae and sometimes the adult beetles.Where possible tolerate populations of plant feeding beetles.Pesticide treatments are likely to kill natural enemies and are only likely to be successful if the entire plant can be reached. Within pesticides the shorter persistence products (that are usually certified for organic growing) are likely to be less damaging to non-target wildlife than those with longer persistence and/or systemic action. When choosing management options you can minimise harm to non-target animals by starting with the methods in the non-pesticide control section and avoiding pesticides. The adult beetles overwinter away from host plants and so there is no suitable treatment outside of the growing season.Ĭheck lilies and fritilaries frequently from early spring onwards so action can be taken before a damaging population has developed. However in some cases plants can be stripped of all foliage which can affect the health of the bulb. Lilies and fritillaries can tolerate some damage from this insect. Malvern Autumn Show - 22–24 September 2023.RHS Garden Wisley Flower Show - 5–10 September 2023.

RHS Garden Rosemoor Flower Show - 18–20 August 2023.

RHS Garden Hyde Hall Flower Show - 2–6 August 2023.RHS Flower Show Tatton Park - 19–23 July 2023.RHS Hampton Court Palace Garden Festival - 4–9 July 2023.

Cardinal shaped bird feeder plans free