Grapholita molesta (Busck, 1916)
(previously known as : Cydia molesta)
Oriental Peach Moth
GRAPHOLITINIOLETHREUTINAETORTRICIDAE

Don Herbison-Evans ( donherbisonevans@yahoo.com )
&
Stella Crossley

(updated 2 September 2008)


(Picture: courtesy of Institute Nationalede Reserche Agricole, Paris)

This Caterpillar has been introduced into Australia by unfortunate accident. It is an international pest on fruit trees in ROSACEAE, particularly :

  • Peach ( Prunus persica ),

    although it will also attack other species including :

  • Quince ( Cydonia oblonga ),
  • Apple ( Malus pumila ),
  • Apricot ( Prunus armeniaca ),
  • Plum ( Prunus domestica ),
  • Nectarine ( Prunus species ), and
  • Pear ( Pyrus communis ).

    The Caterpillars bore into young shoots, causing gumming and malformation.

    The adult moths are grey to brown with a series of darker lines on the forewings. The wingspan is about 1.3 cms. In courtship, the male moth emits pheromones from hairs on the tip of the abdomen, which the females find attractive.


    (Picture: courtesy of Institute Nationalede Reserche Agricole, Paris)

    The eggs are white, oval, witha diameter of about 0.g mm. They are laid singly on leaves, particularly young shoots, of the food plant. A female moth can lay over 200 eggs.


    (Picture: courtesy of Institute Nationalede Reserche Agricole, Paris)

    Various means have been suggested to control the species :

  • the insect growth regulator tebufenozide,
  • carefully timed insecticide applications,
  • mating disruption,
  • the bacterium Bacillus thuringiensis ( BACILLACEAE ),
  • the larva-parasitoid wasp Diloa antipodalis ( ICHNEUMONIDAE ),
  • the larval-parasitoid wasp Dibrochys species ( PTEROMALIDAE ), and
  • the egg-parasitoid wasp Trichogramma ivelae ( TRICHOGRAMMATIDAE ).

    The species is found over much of the world, and is now present in all the eastern states of Australia.


    Further reading :

    G.H.L. Rothschild & R.A. Vickers,
    Biology, Ecology and Control of the Oriental Fruit Moth, in: L.P.S. van der Geest & H.H. Evenhuis (eds) World Crop Pests, Vol. 5, Tortricid pests: their biology, natural enemies and control, Elsevier, Amsterdam, 1991, pp. 389-412.


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