Pine brown tail moth

Pine brown tail moth
Euproctis terminalis (Walker 1855)
Aroa terminalis
Leaf eating

Larvae feed on the needles of pine trees. They can cause severe defoliation when present in large numbers. The larvae tend to chew through the needles and often fall to the ground together with the needles. The larvae then need to make their way back up the trees to feed on fresh foliage. Green needles are often found beneath infested trees. The feeding can result in stunted growth of the trees.

The larvae have 8 instar stages and the size of the caterpillars can be between 1.68 mm for the newly hatched larvae and up to 30 mm for the adult larvae (Grobler 1955). The differences between instars are not very apparent. All instars have wart like protrusions from which hair/setae sprout. They all have a very hairy appearance. The hair of the first instar is a drab brown-grey colour and the last instar has black poisonous setae and long white setae. The adult larva has a maroon coloured head and can have an orange dorso-median stripe. The poisonous urticating’s hairs are 0.07 – 0.2 mm in length and cause dermatitis in humans. Variation in colouring of the larvae are known and they can vary from yellowish to reddish and from black to white.

The cocoon is spun from brown silk and plant material. It is well camouflaged against the soil surface where they can be found beneath the pine needle mat. Pupae are mahogany red in colour and approximately 10 mm long and 5 mm wide (Grobler 1955).

The moth is yellow in colour and they do not feed. The moths emerge from the ground and unfold their wings in the early morning hours. They fly beneath the trees after sunrise and go higher into the branches by midday where they mate. Females can mate multiple times. The antennae in males are plumose when compared to those of females. Females have a brown tuft of setae on the last few segments of the abdomen. They lay egg masses that are covered by setae mainly on the needles of pine trees.

1855 (Walker 1855)
Eastern Cape,KwaZulu-Natal,Limpopo,Mpumalanga
Southern Africa

Africa: Democratic republic of the Congo, Gambia, Lesotho, Malawi, South Africa, Swaziland

Gallery

Euproctis terminalis larvae
Euproctis terminalis larvae
Euproctis terminalis larvae
Euproctis terminalis larvae
Euproctis terminalis larvae
Euproctis terminalis moths
Euproctis terminalis moths
Euproctis terminalis moths
Euproctis terminalis Cocoon and pupa
Defoliation caused by euproctis terminalis larvae

Grobler JH (1955) Some aspects of the biology , ecology and control of the pine brown tail moth, Euproctis termanalis, Walk. University of Pretoria

Walker F. 1855b. List of the Specimens of Lepidopterous Insects in the collection of the British Museum. Part IV. Lepidoptera Heterocera