Halysidota harrisii

Halysidota harrisii, the sycamore tussock moth, is a species of moth of the family Erebidae and the tribe Arctiini, the tiger moths. The species was first described by Benjamin Dann Walsh in 1864.[1] It is found in southeastern Canada, the eastern parts of the United States, and northeastern Mexico.

Halysidota harrisii
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Superfamily: Noctuoidea
Family: Erebidae
Subfamily: Arctiinae
Genus: Halysidota
Species:
H. harrisii
Binomial name
Halysidota harrisii
Walsh, 1864
Caterpillar

Description

The larvae have yellow-orange heads and bodies covered with hair, and they can grow to approximately 25-35 mm in length.[2][3] They exhibit two pairs of long, orange hair-pencils and two pairs of white hair pencils towards the front of their body. They also exhibit one pair of white hair-pencils near the back of their body.

The adults are pale yellow with dark bands on the forewings.[2] Each forewing is 24-26 mm in length, making the wingspan approximately 50 mm.[4] As adults, they are almost indistinguishable from the closely related Halysidota tesselaris.[4]

Life cycle

The sycamore tussock moth produces two generations each year.[2] Moths emerge from overwintering cocoons from May to June.[2] After mating, they lay egg masses on bark the underside of leaves. The larvae feed on the American sycamore tree, Platanus occidentalis.[2] They pupate in late June and July, and emerge as moths in July and August. The offspring of this generation spins cocoons in late September and October and overwinters as pupae.

Importance
Caterpillars and leaf damage

An overpopulation of the insect can be damaging to sycamore trees. Natural predators, such as birds, control most populations. However, pesticides may be needed.[2]

The sycamore tussock moth caterpillar has been documented causing urticaria (hives).[5]

gollark: The crater might even be livable in a hundred years, it's fine.
gollark: How would that work? In my experience crystal growing mostly involves waiting around. Just show "here's a solution" and some of the in-the-middle bits, and then some crystals?
gollark: I mean, people already talk about them a bit, just not in a dedicated channel.
gollark: I'm pretty sure very directional antennas are a thing.
gollark: Wouldn't that just be... a (probably illegally high powered) FM transmitter?

References
  1. Savela, Markku. "Halysidota harrisii (Walsh, 1864)". Lepidoptera and Some Other Life Forms. Retrieved September 17, 2019.
  2. Solomon, J.D.; Wilson, A. Dan; Schiff, N.M. (1999). "A Guide to Major Insects, Diseases, Air Pollution, Injury, and Chemical Injury of Sycamore". Asheville, NC. Cite journal requires |journal= (help)
  3. "Sycamore Tussock Moth". www.insectidentification.org. Retrieved 2020-08-04.
  4. Watson, A. (1980). A revision of the Halysidota tessellaris species-group (Halysidota sensu stricto) (Lepidoptera: Arctiidae)journal=Bulletin of the British Museum (Natural History). British Museum (Natural History).
  5. Smith-Norowitz, TA; Norowitz, KB; Kohlhoff, S; Kalra, K; Chice, S; Bluth, MH (2010). "Immune response profiles after caterpillar exposure: a case report". Journal of Inflammation Research. 3: 45–51. PMC 3218733. PMID 22096356.
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