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There has been localised Australian plague locust (Chortoicetes terminifera) activity over the past month in parts of New South Wales and Victoria. Senior Ranger, Lisa Thomas (LHPA), says locusts have been observed around Warren and Gilgandra, in the Central West Slopes & Plains district of New South Wales. Significant feeding damage occurred in early-sown cereal crops as well as some pastures, but fortunately the high-density swarms were controlled before mass egg laying took place. Lisa says a small locust swarm has also recently been identified west of Orange, in the Central Tablelands district of New South Wales. In this case, some feeding damage was reported to a lucerne crop.
According to the Australian Plague Locust Commission, adult locusts in the Gilgandra–Dubbo area persisted throughout April and some sporadic egg laying may have occurred. The majority of eggs will enter diapause and hatch in late August and September. There is a moderate probability of a medium density nymphal generation developing in these parts during spring, but at this stage there is a low risk of a widespread infestation.
There have been low numbers of Australian plague locusts identified around Jerilderie, Narrandera and Darlington Point, in the Riverina district of New South Wales, and between Bendigo and Kerang, in the Northern Country district of Victoria. However, there is unlikely to be any significant spring populations in these regions. For further updates and information on locusts, refer to the APLC website.
What is PestFacts?
PestFacts south-eastern keeps growers and advisers informed about invertebrate pests and beneficials in broadacre crops and pastures during the winter-cropping season in Victoria and southern New South Wales.
PestFacts south-eastern is run through IPMforGrains: Best Practice Insect Pest Management, a project delivered by the National Pest Information Network (cesar, DPIRD, QDAF, NSW DPI, and SARDI). This project aims to provide grain growers and advisors with information on invertebrate grain pest occurrence and equip industry with the knowledge needed to implement integrated pest management practices. This initiative is a GRDC investment and includes in-kind contributions from all project partner organisations.
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