A total of 13,528 pine trees in 76 different areas of Marbella are being treated in order to protect against the processionary caterpillar.
The councillor for Parks and Gardens, Diego López, announced the measure on Wednesday, saying that plant health "is a priority for the government team and the conservation and maintenance of the extensive mass of trees requires prevention work, which this year has a budget allocation of 175,000 euros".
The councillor explained that, if untreated, caterpillars could cause the trees to rot. They are also known to seriously endanger dogs' lives and pose a potential threat to humans too.
Treatment of the trees, using endotherapy in the majority of locations, is being carried out in large parks and green areas around the town, having started on 1 September. It is expected to be completed on 5 December, before spring when the caterpillars usually leave their nests.
López explained that endotherapy was the preferred method as it is "has no effect on the health of people and animals". The insecticide is injected directly inside the pine and kills the caterpillars when they eat the needles.