PEST
 
   NAME
     Eucalyptus Leaf Beetles
     Various Leaf Beetle Species
 
   ORDER
     Coleoptera
 
   FAMILY
     Chrysomelidae

Description of the Pest
There are many beetles that attack the foliage of plants with one group specialising in Eucalyptus species. These adult beetles have a rounded spherical shape up to 15mm long with small antennae and large feet. The colour varies from yellow-brown, grey, black or green.
The larvae are pale cream-yellow and normally with black areas on the body. Both larva and adult have chewing mouthparts.

Life Cycle
This insect has a Holometabolous life cycle, ie. When metamorphosis is observed during the pupal stage.
The eggs are laid on stems or on the petiole of leaves. They are arranged in a circular pattern in compact rosettes and are a creamy white colour. The larvae pupate in the soil.

Period of Activity and Distribution of the Pest
This pest normally occurs during the warmer months and is found throughout Australia. It is not known what climatic conditions are favourable.

Damage Caused
The adults and larvae eat the leaves. The adults eat mature and new leaves along the margins leaving them scalloped. The larvae tend to attack the juvenal leaves at the top and outer parts of the tree eating them in an irregular manner, often leaving only the midrib. They normally appear in groups.	

Susceptible Plants
These beetles attack many species of Eucalyptus and some species of Acacia.

Cultural Control
The pest may be removed by hand if the infestation is small and plants that are under attack may be helped with improved culture, ie Fertilising, watering and mulching. 

Biological Control
The larvae are attacked by birds and large ants, which diminish the numbers significantly.

  Large ant	 Birds

Chemical Control
If the infestation is severe a contact pesticide may be used but normally it is unwarranted.
Note
Always read the label for registration details and direction of use prior to application of any chemicals.