Lactarius deliciosus Fr. soil extraradical mycelium correlates with stand fruitbody productivity and is increased by forest thinning

L. deliciosus soil mycelium was highly correlated with fruit body production in our study area for the year the soil was sampled and also on the following year, providing us with a promising tool to both model and forecast mushroom crops. Heavier thinning intensities increased the quantities of soil mycelium and sporocarp production in the autumn after it was applied.