The content of manganese in foliage and other parts of trees and undergrowth plants were monitored in the site with heavy level of manganese in soil. The difference between the species and also between parts of the same plant was confirmed. Manganese was accumulated from the soil environment, especially by the speciesBetula pendula, Fagus sylvatica, Sorbus aucuparia, Larix decidua, Vaccinium myrtilus, Rubus ideus, Rubus fruticosus and Digitalis purpurea, where the content of manganese in leaves exceeded 5000 mg kg^-1.

Alnus glutinosa is an actinorhizal plant that fixes N via actinomycetes. Compared to other trees, A. glutinosa is more resistant to environmental stress and able to uptake soil nutrients more easily. Alnus glutinosa grows well not only in natural stands but also in degraded environment or soil in need of restoration. Changes in the contents of selected macro-, micro-, and non-nutrient elements in the leaves of A. glutinosa during the vegetation season were monitored in the Ore Mountains (Czech Republic), an area affected by extreme air pollution in the past. Decreased foliar content of N, P, K, and Cu, and increased content of Ca, Mn, Zn, and Al were observed; the content of other elements (S, Mg, Pb, and Cd) varied during the growing season or remained constant. From the viewpoint of nutrition, the content of N, S, Ca, and Mg macroelements was adequate; concentrations of P and K were low. Excessive amounts of Mn and Zn were measured, and the level of Cu was good. Non-nutrient elements Pb and Cd were present at the background level, and the level of Al was high. N/P, N/Ca, N/Mg, and Ca/Mg ratios were balanced, S/N value showed the lack of S, and N/K ratio indicated low content of K, which caused also suboptimal K/Ca and K/Mg values. The P/Al ratio varied from balanced to lower values. The content of individual elements and monitored changes were influenced by the amount of elements in the soil, moisture conditions, foliage phenology, and altitude.

Deployment of poisoned trap trees/logs is an efficient suppressive method to fight Ips typographus (L., 1758) (Coleoptera: Curculionidae: Scolytinae), a calamity pest of spruce stands in the European area during the gradation period. Logs from Picea abies (L.) H. Karst., 1881 (Pinales: Pinaceae) laid as traps were baited with IT Ecolure pheromone and were treated with Forester insecticide containing cypermethrin as the active substance. Catching frames were placed under the pheromone trap to gather dead imagines. Behaviour of imagines was observed directly in the field and recorded by camera; video records were evaluated in the laboratory. Higher mean air temperature affected favourably the flight activity of Ips typographus and increased the frequency of arrival on and departure from the surface of poisoned trap trees; the imagines stayed on the trap trees for a shorter time. The numbers of dead imagines under the trap trees did not depend on the temperature. The increasing number of live imagines on poisoned trap trees/logs correlated with the increasing proportion of caught dead imagines, decreasing length of live imagines staying on the trap tree, and increasing frequency of arrival to and departure from the trap tree. The presence of pheromone lure and insecticide treatment induced rectilinear and uninterrupted flight towards and away from the pheromone lure. No attempt was observed to gnaw an entrance hole. Mortality on the poisoned trap tree ranged from 18% to 21%; 40%–60% of poisoned imagines died later due to the contamination.