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Gold-fringed Rice Borer

Scientific Name
Chilo auricilius
Scientific Author
Dudgeon 1905
Exotic species - absent from Australia
Exotic species - absent from Australia

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Diagnostic Images

C. auricilius male
S. Anderson DAFF Biosecurity
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Diagnostic Images (11)
Diagnostic Notes
Identification is currently undergoing peer review as part of the National Diagnostic Protocols by SPHDS.

Egg oval, dorsoventrally flattened, scale like and creamy-white appearance when first laid, arranged in 2-5 parallel rows (Chaudhary & Sharma 1986), eggs turn black after a number of days (Shenhmar & Singh 1997).

Larva new larvae creamy-white, approximately 1mm long and have a black flattened head, last instar larvae are about 25-30 mm long with five violet stripes running the length of the body, brown head, crochets multiordinal arranged in complete circles, open spiracles, grey rimmed oval outline (Butani 1956; Shenhmar & Singh 1997).

Pupa range in size from 10-15 mm long depending on sex with the females being larger; dark brown; transverse ride present above eyes (hornlike); abdominal ring segments incomplete, spines extend to spiracles on 5, 6 and 7 segments; spines absent on anal area but have 2 pointy projections (Chaudhary & Sharma 1986).


C. auricilius can be easily confused with C. polychrysus by adult and larval morphology.

Chilo auricilius terminal dots large; subterminal line row of metallic scales close to apical margin; median line metallic; discal dot visible; fringe shining golden; hindwing light brown (Barrion et al 1990).

Chilo polychrysus terminal dots indistinct; subterminal line white with few silvery scales; median line distinct, oblique & pale yellow brown; discal dot highly reduced; fringe slightly glossy; hindwing whitish to dirty cream.

Chilo auricilius ocellus present; face prognathous, smooth or with small point; labial palpus 3 ♂ to 4 ♀ times as long as diameter of eye; forewing: 8-13 mm long with a maximum width of 3-4 mm, R1 confluent with Sc, base colour is yellow, occasionally brown, variable irrorated with brown scales, discal dot present, subterminal line close to termen, signified by a row of metallic scales, median line is the same colour as the subterminal line, few small silvery specks in the middle to the wing, terminal dots large, fringe shiny golden; hind wing light brownish.

Colouration and pattern of the forewing is inconsistent and in some species the fore wing is also most unicolouration yellow; sometimes the silvery specks are irregularly arranged, while in other specimens they have formed two parallel transverse lines.


♂ pars basalis absent; saccus large; juxta plate with 2 symmetrical arms ending before basal costal angle of valva; aedeagus with distinct sub apical conical projection; ventral arm long with a notched apex; bulbose basal projection small; cornutus absent.

♀ ostial pouch slightly demarcated from ductus bursae, medium to heavily sclerotized; signum absent (Bleszynski 1970).

As fresh specimens become available, dissection images will be updated.

Coming soon - PBT link with DNA barcoding for Chilo auricilius.
More Information
Specimen Contact
DAFF Biosecurity
S. Anderson & L. Tran-Nguyen
13/02/2012 11:04 AEST
Last Updated
24/02/2012 19:23 AEST
S. Anderson & L. Tran-Nguyen (2012) Gold-fringed Rice Borer (Chilo auricilius) Updated on 2/24/2012 7:23:07 PM Available online: PaDIL -
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Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)