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On the hop

December 2019

Reports of grasshoppers

We have been receiving a number of recent reports of isolated outbreaks of grasshoppers.

Identification of species can be difficult at the nymph stage. However we can advise that the species landholders are most likely experiencing are a variety of native grasshopper including Yellow-winged Grasshoppers (Gastrimargus musicus), and the Wingless Grasshoppers (Phaulacridium vittatum), rather than the declared pest - Australian Plague Locust (Chortoicetes terminifera).  

In the Central Tablelands Wingless Grasshoppers can occur following long dry periods and behave a bit like locusts when in the nymph stage. They congregate and can cause significant pasture and crop damage where they occur.

We do not provide advice on preferred pesticide/insecticide for grasshopper control, but we advise landholders speak to your local rural merchant/agronomist who will be able to provide advice based on your situation, environmental factors and cropping situation.

If you choose to undertake chemical spraying, please remember to adhere to the chemical use instructions on the pesticide/insecticide label - including application rates, withholding periods, export slaughter intervals etc. For better effectiveness and to reduce risks to non-targets like bees, it is advisable to undertake spraying within the nymph stage.

More information about Wingless Grasshoppers can be found here.  

More information relating to species identification can be found here.

Do you suspect Australian Plague Locust?

If you believe you have Australian Plague Locusts, you are required to report incursions to your local biosecurity staff who will organise an inspection.

The Australian Plague Locust Commission (APLC) November Bulletin provides the general outlook for locusts this season.