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Recentarmywormcaterpillarreports
In the past few weeks, armyworm have been reported at many locations across South
Australia, including:
on wheat and barley at Balakava
on wheat amongst lentils at Halbury
in a wheat trial at Tarlee
5?20mm long caterpillars on cereals at Tumby Bay
on wheat at Cleve
3 leaf to early tillering cereals at Manoora
on cereals in the Mid North (exact location unspecified).
Source of reports: Chris Pearce (Nutrien), Michael Nash (supported by SANTFA, through
funding from the Australian Government’s National Landcare Program.), Cherylynn Dreckow
(Elders), Lauren Philps, Chris Davey (YPAg).
How to identify armyworms
Armyworms are identifiable by 3 parallel white stripes along their body, most prominently
seen on the cervical shield (“neck” or collar). Older caterpillars crawl around at night and
may move up and down grass and cereal plants regularly. They spend the day curled up at
the base of the plant under clods of soil or in the plant crown.
3 species of armyworm are common in southern Australia. Other regions have different
species.
Armyworm species found in southern Australia
Southern and inland armyworms (Persectania species) are more typically found during
autumn and winter, but their activity can sometimes spread into spring.
Common armyworm (Leucania convecta) can potentially be seen year-round, but particularly
in spring.
Armyworm caterpillars can be confused with:
native budworm ( has more prominent body hairs than armyworm caterpillars)
cutworms (cutworms have indistinct or no stripes absent or indistinct),
other grass feeding noctuids such as herringbone caterpillars (herringbone caterpillar have
herringbone-like markings on the stripes down the body).
The exotic fall armyworm (FAW, Spodoptera frugiperda) looks similar to other native
armyworms and has the typical 3 stripes. For more information on identifying FAW, see
- 712 -
In the past few weeks, armyworm have been reported at many locations across South
Australia, including:
on wheat and barley at Balakava
on wheat amongst lentils at Halbury
in a wheat trial at Tarlee
5?20mm long caterpillars on cereals at Tumby Bay
on wheat at Cleve
3 leaf to early tillering cereals at Manoora
on cereals in the Mid North (exact location unspecified).
Source of reports: Chris Pearce (Nutrien), Michael Nash (supported by SANTFA, through
funding from the Australian Government’s National Landcare Program.), Cherylynn Dreckow
(Elders), Lauren Philps, Chris Davey (YPAg).
How to identify armyworms
Armyworms are identifiable by 3 parallel white stripes along their body, most prominently
seen on the cervical shield (“neck” or collar). Older caterpillars crawl around at night and
may move up and down grass and cereal plants regularly. They spend the day curled up at
the base of the plant under clods of soil or in the plant crown.
3 species of armyworm are common in southern Australia. Other regions have different
species.
Armyworm species found in southern Australia
Southern and inland armyworms (Persectania species) are more typically found during
autumn and winter, but their activity can sometimes spread into spring.
Common armyworm (Leucania convecta) can potentially be seen year-round, but particularly
in spring.
Armyworm caterpillars can be confused with:
native budworm ( has more prominent body hairs than armyworm caterpillars)
cutworms (cutworms have indistinct or no stripes absent or indistinct),
other grass feeding noctuids such as herringbone caterpillars (herringbone caterpillar have
herringbone-like markings on the stripes down the body).
The exotic fall armyworm (FAW, Spodoptera frugiperda) looks similar to other native
armyworms and has the typical 3 stripes. For more information on identifying FAW, see
- 712 -
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