Pests and Diseases
- A single poplar sawfly, Cladius grandis (Tenthredinidae), larva was detected in a gypsy moth trap in Dunedin in February 2019
- Adults: 6-9mm; overall reddish yellow, head and part of thorax black; wings yellowish hyaline strongly iridescent, venation reddish yellow
- Larvae: up to 16mm; overall yellow with two lateral rows of black spots (dorsal much larger than ventral) and whitish hairs; head blackish and brownish except some yellow spots on the frontal part
- Host plants include species from Family Salicaceae: Populus alba, P. balsamifera, P. canadensis, P. dilatata, P. monilifera, P. nigra, P. tremula, P. pyramidalis, Salix caprea (pussy willow).
Otago Regional Council: https://www.orc.govt.nz/media/6483/poplar_sawfly_fact_sheet.pdf