Brown-tail moth

**Description and Distribution**:
– Brown-tail moth belongs to the family Erebidae and is native to Europe, neighboring Asian countries, and North Africa.
– It has a unique 9-month life cycle as larvae, with distinctive red spots near the tail.
– Adults have white wings, a hairy white body, and a brown hair tuft at the abdomen tip.
– Historically, outbreaks have been recorded in major European cities like Paris, London, and Berlin since the 1500s.
– Invasive populations of the brown-tail moth are found in the United States and Canada since 1890, primarily affecting coastal regions like Maine and Cape Cod.
– Detection methods include aerial fly-over photos, moth traps using synthesized female sex hormones, and attraction to light, causing a snowfall-like appearance around lights.

**Life Cycle and Predation**:
– The brown-tail moth produces one generation per year, with eggs laid in July and hatching in August, typically on oak trees.
– Larvae build distinct communal winter nests for overwintering.
– Various bird species prey on winged adults in the U.S., while parasites, viruses, and predators contribute to population fluctuations.
– Control methods involve clipping branch-tip webs, proper disposal, pesticide application, and the use of Bacillus thuringiensis (Bt) sprays, emphasizing the importance of protective gear during control activities.

**Health Impacts**:
– Exposure to brown-tail moth larva hairs can cause skin rashes, itching, and breathing difficulties, known as lepidopterism.
– Shed hairs remain potent for up to three years, highlighting the need for caution and protective gloves when handling the species.
– The species feeds on various host plants, affecting fruit orchards, ornamental trees, and hardwood forests, with larvae descending to the ground when trees are bare.

**Parasites and Diseases**:
– Parasites like Compsilura concinnata introduced to North America in 1906 target brown-tail moth larvae.
– Parasitic flies pierce the larvae and deposit their own larvae inside, impacting brown-tail moth populations.
– Other fly species also act as parasites, with the need for larvae to overwinter inside a host larvae.
– Mortalities of the brown-tail moth are influenced by parasites, viruses, and predators, causing periodic population outbreaks followed by declines.

**Research Studies and Implications**:
– Studies like those by Villar J and Selfa S in 2010 and Sterling PH and Speight MR in 1989 have examined the phenology shifts, mortalities, and factors affecting brown-tail moths.
– Importation of insect enemies, as studied by Burgess AF in 1929, highlights the importance of controlling invasive species like the brown-tail moth.
– Health impacts of caterpillar rash have been researched by Blair CP in 1979 and outbreaks of caterpillar dermatitis, as studied by Balit C. R. et al. in 2001, emphasizing the medical implications of contact with caterpillars.