pine processionary caterpillar on leaf, thaumetopoea pityocampa, spain

allergic caterpillar coniferous damage defoliation dermatitis dispersal economic furry green irritation moth necrosis nests parasites pests pheromone processions rash reactions suffocation swelling thaumetopoea thaumetopoein throat traps trees urticaria wasps black caution climate conifers control danger environmental forest forestry hair health insect leaf mediterranean mossy orange pine pityocampa poison predators toxic