Between October and March the infestation of the Pine tree catterpillar stars. At that time of the year, caterpillars develop into adults and from their nests a power starts to appear. The said insect powder can cause: red sports on the skin (allergies), throat and eyeball irritations, breathing problems and also can destroy the pine trees.
To simply trim off tree branches is not sufficient to avoid these health consequences to those who have pine trees near their home. To avoid this sort of infestation the trees must be disinfected in October and examined once again in January (in case of the larvae survived).