@article{ journal={Acarologia}, title={Effect of forest fertilization on the spruce spider mite Oligonychus ununguis (Jacobi) (Acarina, Tetranychidae)}, volume={32}, number={2}, pages={139-143}, year={1991}, issn={0044-586X, 2107-7207}, publisher={Les Amis d'Acarologia}, author={Loyttyniemi, K. and Heliovaara, K.}, url={https://www1.montpellier.inrae.fr/CBGP/acarologia/article.php?id=2433}, keywords={Oligonyghus ununguis; Pigea abies; nitrogen; pest control; Finland }, language={English} }