New "Vaccine" Shows Promise in Saving Pine Trees from Nematodes

Scientists are exploring a novel approach to combat the pine wilt nematode, a devastating pest affecting pine trees. Instead of removing infected trees, research is focusing on a biological "vaccine" that uses a predatory fungus, Esteria vermicola. This fungus is injected into the trees and targets the nematodes within the tree's system.

Experiments conducted between 2020 and 2023 on Geoje Island, South Korea, showed that some pine trees treated with this fungal agent survived nematode infestation. According to the National Park Research Center, about 78% of treated trees exhibited recovery signs. The fungus reportedly attaches to nematodes inside the tree, penetrates them, and kills them.

Further studies support these findings. A 2018 experiment involving pine trees in Jinju observed that while untreated trees died within the first year of nematode infection, up to 50% of trees treated with the predatory fungus survived for six years. This suggests a significant improvement in tree survival rates compared to traditional methods.

Traditionally, preventing pine wilt nematode involved injecting trees with pesticides, offering about three years of protection. However, repeated treatments could harm the trees and reduce effectiveness. The new fungal treatment, if successfully developed, could offer a more sustainable solution by allowing infected trees to recover and reducing the need for removal, while also continuously combating the pest within the tree.