Lawn Army Worm Aspodoptera mauritia
Coloured bars indicate peak activity periods in the adult armyworm .
The numerous species of Armyworms in Australia are foremost pests of cereals and grasses. The name Armyworm is derived from the mass movement of caterpillars during their active and damaging periods. Armyworms are from three genera, Persectania spp., Pseudaletia spp. and Spodoptera spp . Their pest status and distribution in Australia varies between species. The principal species of Armyworm in Australia known to be pests of turfgrass are the Common armyworm ( Pseudaletia convecta), Southern armyworm (Persectania ewingii) and the Lawn armyworm (Spodoptera maurita). The Southern armyworm is the most common and widespread Armyworm species having been originally named in 1839. The least common armyworm species are the Inland armyworm (Persectania dyscrita), Day-feeding armyworm (Spodoptera exempta), Lesser armyworm (Spodoptera exigua) and the Cluster caterpillar (Spodoptera litura).
The various Armyworm adult stages (moths) and larval stages (caterpillars) are relatively similar in size but vary in colour and markings to the extent of requiring professional examination by entomologists to distinguish the species. The identity and taxonomy of Australian Armyworm genera have been studied (Common, 1954a; 1965) because of their agricultural significance. The biology of many Armyworm species is similar in Australia. Some species such as the Lawn armyworm are also known overseas.
Field grown crops
Apply Turfnem 2 at a rate of ten tubs per hectare apply through a boom spray with a minimum of 500 litres of water per hectare.
This nematode species is known as Steinenema carpocapsae which has a high efficacy on armyworm and therefore can be controlled a lower rate per hectare.