sanitary felling of trees infected with eight teeth-typographus ips typographus. moscow oblast. russia.

2020 autumn bark beetle blade bulldozer cut cutting day deforestation disease dried dry earthmove ecology eight environmental fall fell felled felling firewood forest forestry harvesting infected insects ips kill landscape logging logs lumber lumbering machine moscow oblast operations pile pine problem procurement russia russian sanitary sawing sunny teethtypographus timber trac tractor tree trees typographus view wood work