Genus Diarsia

Chevron Cutworm, Diarsia intermixta

Late October 2023
Kelcey Tier, Devonport
Identification thanks to Ben Kurek

IMG 8474  IMG 8473

September 1 2016
Hobart
Emerged adults (reared below).
Chevron Cutworm, Diarsia intermixta Chevron Cutworm, Diarsia intermixta

Rearing:
June 20 2016
Hobart
Eggs on Silverbeet in a vegetable garden.
Chevron Cutworm, Diarsia intermixta
June 26 2016
Day 1

June 30 2016
Day 6
The young caterpillars moved in a looping fashion.
Chevron Cutworm, Diarsia intermixta (early instar larva)
July 4 2016
Day 9

July 8 2016

July 10 2016

July 12 2016

July 14 2016
The caterpillars were consuming about 2 medium silverbeet leaves a day at this point. They would feed mainly at night and hide during the day.

July 17 2016

July 19 2016
As the size was increasing I added soil and a range of dead branches as possible pupation sites.

July 22 2016
Chevron Cutworm, Diarsia intermixta (later instar larvae)

July 24 2016

July 28 2016
Numbers were dropping and the food consumption reduced.

August 2 2016
Final remaining caterpillars. After investigating the soil there were obvious soft cocoons covered with soil. The available soil was less than 2cm deep.
Chevron Cutworm, Diarsia intermixta (pupal cocoon)
Cocoon with exit hole (although this can’t have been the case as there was an intact pupa inside. The cocoon must have lines of weakness that break just prior to emergence.

Pupa
September 1 2016
The abdominal tip was still connected to the cocoon.

Various Adults that started emerging on September 1st – 73 days after the eggs were collected.