PESTS AND DISEASES OF FORESTRY IN NEW ZEALAND
Cladius grandis, poplar sawfly
Not known to be established in New Zealand
The adult flies are 6-9mm in length, mostly reddish-yellow and have a black head and a partly black thorax.
The larvae can be up to 16mm and are yellow overall, with two lateral rows of black spots and white hairs.
- What is yellow and hairy and eats poplar leaves?
Toni Withers, New Zealand Tree Grower November 2021. A new threat to poplars has arrived. The hairy poplar sawfly was first spotted in Dunedin in 2019 after one larva accidentally…
- Managing the poplar sawfly (Cladius grandis)
Information sheet, April 2019 Young larvae feeding together. What does it look like? Mature larva. Caterpillar-like larvae are the most conspicuous life stage of the poplar sawfly, a new pest…
- Look out for poplar sawfly, not known to be established in New Zealand
Adult and young larva Young larva Grown larva Feeding Pupa Feeding damage 18 February 2019 Recently, a single poplar sawfly, Cladius grandis (Tenthredinidae), larva was detected in a gypsy moth…