PLANT PROTECTION 1 – Pests, Diseases and Weeds

PLANT PROTECTION 1 – Pests, Diseases and Weeds
DIRECT FEEDING DAMAGE
Chewing damage
Fig. 6. Citrus butterfly caterpillars chew lemon leaves.
Upper: Large citrus butterfly caterpillar (up to 65mm long).
Lower: Small citrus butterfly caterpillar (up to 40mm long).
PhotoCIT, Canberra (P.W.Unger).
Fig. 7. Pear and cherry slug larva (up to 13 mm long)
chewing the surface of a cherry leaf (skeletonization).
PhotoCIT, Canberra (P.W.Unger).
Fig. 8. Bean weevil damage.
Larvae feed inside bean seed creating
cavities which are covered by thin skin
through which the adult emerges.
PhotoNSW Dept of Industry and Investment.
Fig. 9. Azalea leafminer damage. Undersurface of
azalea leaves showing mines, the tiny caterpillars feed
between the upper and lower leaf surfaces. Later they roll
the leaf tips under to form a chamber in which they later
pupate. PhotoCIT, Canberra (P.W.Unger).
Fig. 10. Citrus gall wasp damage. Left: Swellings
on a stem of a citrus tree produced by the larvae feeding
inside the stem. PhotoCIT, Canberra (P.W.Unger). Right: Galled
twig showing exit holes of adult wasp.
Fig. 11. Codling moth damage.
Caterpillar (larva) chewing inside an
apple near the core. PhotoNSW Dept of
Industry and Investment (E.H.Zeck).
Insects and allied pests - Plant damage 29