Neomyzus circumflexus (Buckton, 1876)
Lily aphid, Crescent-marked lily aphid, Mottled arum aphid
Siphonophora circumflexa Buckton, 1876
Nectarophora circumflexa (Buckton, 1876)
Myzus circumflexus (Buckton, 1876)
Myzodes circumflexus (Buckton, 1876)
Aulacorthum circumflexus (Buckton, 1876)
Aulacorthum (Neomyzus) circumflexus (Buckton, 1876)
Macrosiphum circumflexum (Buckton, 1876)
Myzus circumflexum (Buckton, 1876)
Neomyzus circumflexum (Buckton, 1876)
Macrosiphum pelargonii van der Goot, 1915
Macrosiphum primulanum Matsumura, 1917
Myzus vincae Gillette, 1908
Siphonophora callae Henrich, 1909
Neomyzus callae (Henrich, 1909)
Biostatus and distribution
This adventive aphid is found in many countries. It is believed to originate in East Asia. In New Zealand, like in other countries, it may live on a wide variety of plants from many families. It is very polyphagous. It is found on native plants as well on naturalised and cultivated plants. In cooler areas it may be found in greenhouses.
Conservation status: It lives on native plants in native ecosystems, and on naturalised and cultivated plants. It may be a minor pest.
Life stages and annual cycle
Only females of the Lily aphid are known. Adults may be winged or wingless and give live birth to nymphs. Wingless adults are shining nearly white or pale yellow to bright green. They have distinctive dark markings on the upper, dorsal, side of the body. The dark markings consist of transverse bands or paired patches on the thorax (middle part of the body) and a large roughly U-shaped, patch on the abdomen. The winged female also has black markings on its dorsal surface and on the underside of the thorax. Like other aphids it has two pairs of wings. The adults and nymphs have three pairs of legs and one pair of antennae. Legs and antennae tend to have dark areas, especially at the joints. On the underside of the head is the rostrum, that holds the stylets used for feeding. When not in use the rostrum points back between the legs. Towards the rear of the abdomen is a pair of tubes, siphunculae, from which honeydew is secreted. The siphunculae and the cauda (central projection at rear of abdomen) are the same colour as the body.
Adult females give live birth to nymphs that look like small wingless adults. The first instar (stage) nymph has pale legs and siphuncles, and the end of the abdomen is rounded. There are four nymphal stages. Nymphs go from one stage to the next by moulting, changing their skin. The mature nymph moults into the adult. Nymphs that are going to develop into winged adults have wing buds.
Feeding and honeydew
Like other Hemiptera, the Lily aphid has sucking mouthparts. The two pairs of long stylets (specially shaped rods) are held in the rostrum. When it wishes to feed, the aphid moves the tip of the rostrum to the surface of the plant. The stylets are then gradually pushed into the plant. One pair of stylets, the maxillae, form two tubes; one through which saliva is injected into the plant and a second through which plants juices are sucked up into the insect. The Lily aphid inserts the stylets into the phloem (the plant vessels for transmitting sap from the leaves to other parts of the plant). The sap has a high volume of water and sugars, more than the insect needs. Excess water and sugar is excreted from the siphuncles and called honeydew.
Normally aphids require specialist skills for their identification, However, wingless female Lily aphids typically are shining nearly white or pale yellow to bright green, with distinctive sclerotic dorsal markings, consisting of transverse bands or paired patches on the thorax and a large roughly U-shaped, patch on the abdomen. The distinctive dark pattern on the dorsal (upper) side of the abdomen makes them easily recognisable. Some populations have wingless females that lack the dark markings on their abdomens and non-experts cannot reliably identify them.
On ferns, Lily aphids without dark marking on their abdomen can be distinguished from Green fern aphids, Micromyzella filicis (van der Goot, 1917) (Hemiptera: Aphididae) which has black cornicles and cauda.
Two parasitoid wasps have been reared from Lily aphids. There may be other parasitoids and the aphids are probably preyed upon by birds, spiders and predatory insects.
Lily aphids feed on a wide range of plants, ferns, herbaceous plants, climbers shrubs and trees belonging to many families. It is very polyphagous. Aphid colonies are mainly found on young leaves, shoots and inflorescences.
Feeding and honeydew
Like other Hemiptera, Lily aphids have sucking mouth parts. The long stylets, special shaped rods, are held in the rostrum. When it wishes to feed the aphid moves the tip of the rostrum to the surface of a leaf or stem. The stylets are then gradually pushed into the plant. The inner pair of stylets, form two tubes, one through which saliva is injected into the plant and a second through which plants juices are sucked up into the insect. Lily aphids insert its stylets into the phloem, the plant vessels for transmitting sap from the leaves to other parts of the plant. The sap has a high volume of water and sugars, more than the insect needs. Aphids excrete the excess water and sugar, which is called honeydew.
|Common Name(s)||Scientific Name||Family||Reliability Index||Biostatus|
|Spleenwort, Petako rauriki, Petako-pāraharaha||Asplenium sp.||Aspleniaceae||7||unknown|
|Creeping tree fern, Mountain tree fern||Cyathea colensoi (Hook.f.) Domin||Cyatheaceae||9||endemic|
|Single crepe fern, Heruheru||Leptopteris hymenophylloides (A. Rich.) C. Presl.||Osmundaceae||10||endemic|
|Anzybas rotundifolius (Hook.f.) D.L.Jones & M.A.Clem.||Orchidaceae||5||endemic|
|Renga lily, Rock lily, Māikaika, Rengarenga||Arthropodium cirratum (G.Forst.) R.Br.||Asparagaceae||9||endemic|
|Bog lily||Bulbinella rossii (Hook.f.) Cheeseman||Asphodelaceae||5||endemic|
|Belgian endive, Chicory, Succory, Witloof||Cichorium intybus L.||Compositae||9||naturalised|
|Kākawariki, Kanono, Kapukiore, Karamū-kueo, Kueo (fruit), Manono, Pāpāuma, Raurēkau, Toherāoa||Coprosma grandifolia Hook.f.||Rubiaceae||10||endemic|
|Glossy karamu, Kākaramū, Kākarangū, Karamū, Kāramuramu, Karangū||Coprosma robusta Raoul||Rubiaceae||10||endemic|
|Cabbage tree, Giant dracena, Grass palm, Palm lily, Sago palm, Ti, Kāuka, Kiokio, Kōuka, Tī, Tī awe, Ti kōuka, Tī para, Tī pua, Tī rākau, Whanake||Cordyline australis (G.Forst.) Endl.||Asparagaceae||9||endemic|
|Alpine violet, Cyclamen, Persian violet, Sowbread||Cyclamen sp.||Primulaceae||7||cultivated|
|Fuchsia, Ladies' eardrops||Fuchsia sp.||Onagraceae||7||unknown|
|Shrubby haloragis, Toatoa||Haloragis erecta (Banks ex Murray) Oken||Haloragaceae||8||endemic|
|Lacebark, Hohere, Hoihere, Houhere, Houhi, Houhi ongaonga, Houī, Ongaonga, Whauahi, Wheuhi||Hoheria populnea A.Cunn||Malvaceae||10||endemic|
|Whiteywood, Hinahina, Inaina, Inihina, Māhoe, Moeahu, Kaiweta||Melicytus ramiflorus J.R.Forst. & G.Forst.||Violaceae||10||indigenous, non-endemic|
|Puka, Pukanui||Meryta sinclairii Hook. f.) Seem.||Araliaceae||9||endemic|
|Northern rata, Rātā||Metrosideros robusta A. Cunn.||Myrtaceae||10||endemic|
|Mountain foxglove, Hue-o-Raukatauri||Ourisia macrophylla Hook.||Plantaginaceae||5||endemic|
|Iceland poppy||Papaver nudicaule L.||Papaveraceae||9||naturalised|
|New Zealand jasmine, Akakaikiore, Akakiore, Kaihua, Kaikū, Kaiwhiria, Poapoa, Tautauā, Tawhiwhi, Tūtae-kererū||Parsonsia heterophylla A. Cunningham||Apocynaceae||10||endemic|
|Pepper tree, Kawa, Kawakawa||Piper excelsum G.Forst.||Piperaceae||10||endemic|
|Supplejack, Akapirita, Kakareao, Kakarewao, Kareao, Karewao, Kekereao, Pirita, Taiore||Ripogonum scandens J.R.Forst. & G.Forst.||Ripogonaceae||10||endemic|
|Seven-finger, Kohi, Kotētē, Patate, Patatē, Patē, Patētē||Schefflera digitata J.R.Forst. & G.Forst.||Araliaceae||9||endemic|
|Fireweed, Shore groundsel, Variable groundsel||Senecio lautus G.Forst. ex Willd.||Compositae||10||indigenous, non-endemic|
|Apple of Peru, Peruvian apple, Tomato||Solanum lycopersicum L.||Solanaceae||10||naturalised|
|Potato, Hīwai, Huiwaiwaka, Kapana, Mahetau, Parareka, Parate, Rīwai, Taewa, Taewha||Solanum tuberosum L.||Solanaceae||9||naturalised|
|Stilbocarpa robusta (Kirk) Cockayne||Umbelliferae||10||endemic|
The Lily aphid may occasionally cause concern in a garden or on crops. If an insecticide is felt necessary, chose one that will cause least harm to predators and parasitoids.
Aphids on New Zealand ferns
In New Zealand five species of aphids have been found breeding on ferns. Two species are only found on ferns, while three species are polyphagous. The two specialist fern feeders are the black fern aphid, Idiopterus nephrelepidis Davis, 1909 and the green fern aphid, Micromyzella filicis (van der Goot, 1917). The latter is common in Auckland. The three polyphagous species are, Brachycaudus helichrysi (Kaltenbach, 1843), Myzus ornatus Laing, 1932, and the Lily aphid, Neomyzus circumflexus (Buckton, 1876).
Aphids on worlds plants; Neomyzus circumflexus. www.aphidsonworldsplants.info/d_APHIDS_N.htm#Neomyzus.
Cottier W. 1953. Aphids of New Zealand. N.Z. Department of Scientific and Industrial Research Bulletin. 106: 1-382.
Plant-SyNZ: Invertebrate herbivore-host plant association database. plant-synz.landcareresearch.co.nz/.
Dr Robert Foottit, Canadian National Collection of Insects, Ottawa, Canada, for identification of aphids.
The New Zealand Institute for Plant & Food Research Limited (Plant & Food Research) for permission to use photographs.