Green vegetable bug, Nezara viridula, in
Green vegetable bug (GVB) is a pest of a wide range of crops and
ornamental plants. The owners of a pecan orchard near Moree, north
western New South Wales wanted to reduce their use of pesticides
so CSIRO Entomology, amongst other things, looked for possible biocontrol
Pecans are a
nut tree native to the southern USA. Feeding of adult GVB causes
pre-mature nut fall and black pitting of the kernel.
In 1994, the
parasitic fly Trichopoda giacomellii, was imported for quarantine
evaluation and subsequently approved for release in Australia in
1996. It is native to South America where it is an important natural
enemy of GVB.
has caused a three to five fold reduction in GVB numbers and the
bug is no longer considered a pest at the pecan orchard. When the
eggs hatch, the larvae penetrate the body wall and feed in the abdomen.
by: Stahmann Farms, Horticultural Australia Ltd