. British journal of entomology and natural history. Natural history; Entomology. BR J. ENT. NAT 3: 199(1 1 FIRST BRITISH RECORD OF A GALL MIDGE PEST OF DAY LILY (HEMEROCALLIS FULVA L.) Halstead The Royal Horticultural Society's Garden, Wisley, Woking, Surrey GU23 6QB and Harris CAB International Institute of Entomology, 56 Queen's Gate, London SW7 5JR. On 20 June 1989, a sample of flower stems of day lily (Hemerocallis fulva L.) was received at the Royal Horticultural Society's Garden, Wisley, from a private garden at Weybridge, Surrey. The flower buds on these stems were con
. British journal of entomology and natural history. Natural history; Entomology. BR J. ENT. NAT 3: 199(1 1 FIRST BRITISH RECORD OF A GALL MIDGE PEST OF DAY LILY (HEMEROCALLIS FULVA L.) Halstead The Royal Horticultural Society's Garden, Wisley, Woking, Surrey GU23 6QB and Harris CAB International Institute of Entomology, 56 Queen's Gate, London SW7 5JR. On 20 June 1989, a sample of flower stems of day lily (Hemerocallis fulva L.) was received at the Royal Horticultural Society's Garden, Wisley, from a private garden at Weybridge, Surrey. The flower buds on these stems were considerably enlarged (Fig. 1) and the petals inside the buds were thickened. Affected buds were failing to open and some had turned brown and dried up at an early stage of development. The misshapen buds contained large numbers of small, white gall midge larvae and these samples were forwarded to the CAB International Institute of Entomology for further study. Reference to the European literature on gall midges established that this pest is Contarinia quinqiienotata (F. Low) (Diptera:Cecidomyiidae) and this appears to be the first record of this species from the British Isles. The species was originally described from Austria by Low (1888) and has also been recorded from Sweden, the Netherlands, West and East Germany. Poland, Czechoslovakia, Hungary and Yugoslavia in the Catalogue of Palaearctic Diptera (Skuhrava, 1986). An examination of Hemerocallis plants growing in the RHS Garden at Wisley showed that the midge was also present there and widely scattered throughout the Garden's 240 acres (97 hectares). Later in the summer a sample of infested buds was received from another Weybridge garden, close to the first, and a third sample was sent in from Buxted, East Sussex. The latter correspondent said that the problem. Fig. 1. Normal Hemerocallis flower buds on the left and gall midge-affected buds in the centre and on the Please note that these images are extracted from sc
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