Your are here:

Gold-fringed Rice Borer

Scientific Name
Chilo auricilius
Scientific Author
Dudgeon 1905
Taxonomy
(Lepidoptera:Crambidae)
Status
Exotic species - absent from Australia
Reliability
High
Download
PDF

Page menu options:

Diagnostic Images

Dead heart damage
Close
Caption
N. Sallam
Source
N. Sallam DAFF Biosecurity
Image Options
Close
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).

Adult

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.

Genitalia

♂ 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
Author
S. Anderson & L. Tran-Nguyen
Created
13/02/2012 11:04 AEST
Last Updated
24/02/2012 19:23 AEST
Citation
S. Anderson & L. Tran-Nguyen (2012) Gold-fringed Rice Borer (Chilo auricilius) Updated on 2/24/2012 7:23:07 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

Loading