Disorders caused by non-living agents; diseases caused by living agents on a wide range of hosts; diseases of spruce; diseases of pine; diseases of larch; diseases of Douglas Fir; diseases of minor forest confiers - abiss, cupressus and chamaecyparis, thuja and tsuga; diseases of other confiers; diseases of oak; diseases of sweet chestnut; diseases of beech; diseases of ash, birch and alder; diseases of sycamore and maple; diseases of elm; diseases of poplar; diseases of willow; diseases of wild and ornamental rosaceus trees; diseases of other broadleaved trees; decay fungi of broadleaved and coniferous trees.