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Spotted Borer

Scientific Name
Chilo sacchariphagus
Scientific Author
(Böjer 1856)
Taxonomy
(Lepidoptera:Crambidae)

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Diagnostic Images

Larva in shoot
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Caption
N. Sallam
Source
N. Sallam BSES Ltd
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Diagnostic Images (15)
Diagnostic Notes
Identification is currently undergoing peer review as part of the National Diagnostic Protocols by SPHDS.

The adult specimens sourced were received in alcohol. Recovery techniques for wet Lepidoptera were unsuccessful. As fresh specimens become available more photographic images will be uploaded.

Early instar damage is obvious as the unfolded leaf has been bored and after the leaf unfolds, white stripes and mottling with fine frass may be seen. At a later stage larvae leave the sheath and bore into the cane where they destroy new growth areas causing dead heart and bunchy top (Kalshoven 1981).

Newly emerged larvae have 2 distinct red transversal stripes while mature larvae have 4 longitudinal stripes as a series of dots viewed dorsally (Kalshoven 1981). They leave a line of small holes on new leaves and as the larvae mature, they tunnel irregular holes inside the internodes. The adult exits through an oval shape hole (Sallam et al. 2010).

Adult ocellus reduced; face rounded not protruding forward beyond eye; corneous point and ventral ridge absent; labial palpus 3 ♂ to 4 ♀ x as long as diameter of eye; forewing R1 confluent with Sc, length 12-18mm maximum width 4.5-6mm, ground colour dull light brown, veins and interneural spaces outlined with whitish beige, discal dot distinct, often double, terminal dots present, transverse lines absent, fringes slightly glossy, concolorous or lighter than the ground colour; hindwing dirty white to light brown in ♂, silky whitish in ♀.

Genitalia ♂ valva slightly tapering to rounded apex, which is slightly concave; pars basalis absent; juxta plate short, broad, deeply notched, arms tapering without teeth; saccus V shaped; aedeagus variable in width; ventral arm and basal absent; row of strong tapering cornuti present and subapical large patch of scobinations absent.

♀ ostial pouch rather well demarcated from ductus bursae, broad and heavily sclerotized; ductus bursae with heavily sclerotized longitudinal ribs; corpus bursae elongate, longer than ductus bursae, with large area of scobinations (Bleszynski 1970).

Coming soon - PBT link with DNA barcoding
More Information
Specimen Contact
DAFF Biosecurity; BSES Ltd Gordonvale
Author
S. Anderson & L. Tran-Nguyen
Created
15/02/2012 10:57 AEST
Last Updated
27/02/2012 10:32 AEST
Citation
S. Anderson & L. Tran-Nguyen (2012) Spotted Borer (Chilo sacchariphagus) Updated on 2/27/2012 10:32:21 AM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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