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Willow Sawfly

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Lifecycle | Defoliation | Willow Sawfly in Victoria

Willow Sawfly lifecycle

Adult

Willow Sawfly egg


EGG - The eggs are about 1 - 2 mm long, and oval or kidney-shaped. They range from bright green to yellowy-green in colour.

They are often laid on the upper leaf surface. (Photo: DAFF)



Willow Sawfly pupa




PUPA - Willow sawfly pupate in cocoons. The oblong cocoon is up to 10 mm long, and domed with a flat bottom. Cocoons range in colour from brown to lime green, and may be found on the leaves or bark of the tree, or in leaf litter below the tree. (Photo: DAFF)



Willow Sawfly larva
Willow Sawfly larva


Willow Sawfly larva

Larva - Larvae can grow to 20 mm long. Young larvae are yellow-green in colour. As the larvae grow, the body colour deepens to green. They may have darker green - brown stripes running down the body. The head is lighter, with 2 stripes running from behind the eyes to the top of the head, and a brown triangle on the front of the head. (Photo: DAFF, HortResearch)


Adult Willow Sawfly


Adult Willow Sawfly


Adult Willow Sawfly

Adult - The adult is about 7 - 8 mm long, plus antennae which are 4 - 5 mm long. The head and thorax of the adult is yellowish-orange/brown, and shiny. The abdomen is green. The wings of the adult are transparent, with dark brown veins. (Photos: HortResearch, DAFF)

Willow Sawfly Defoliation






Willow Sawfly Initial Defoliation
Initial leaf damage (Photo: HortResearch)


Willow Sawfly Partial Defoliation
Partial leaf damage. (Photo: DPI)


Willow Sawfly Defoliation
Only mid-ribs remain after leaf completely stripped by
willow sawfly larvae. New growth develops
at top of shoot. (Photo: DPI)


Willow Sawfly Defoliation Kiewa
Defoliated crack willows on the Kiewa River, NE Victoria,
January 2006. (Photo: NECMA)


Willow Sawfly Defoliation Canberra Airport
Defoliated golden upright willow next to untouched weeping willow,
near Canberra airport January 2005. Photo: Lynton Bond)


Willow Sawfly Defoliation Great Western Highway NSW
Willows defoliated by willow sawfly at Meadow Flat,
Great Western Highway, NSW, April 2006 (Photo: DPI)


Willow Sawfly in Victoria

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Willow Sawfly in Victoria



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