Effect of the Fungus Neoscylitiadium dimidiatum Penz. Reduction of Dry Weight and Specific Weight of Sapwood and Heartwood of the Trunks of Populus and Eucalyptus Trees

Abstract

Abstract The study was carried out in the Forest Diseases Laboratory, Department of Forest Sciences, College of Agriculture and Forestry, University of Al Mosul. During the academic year 2021-2022, the Sakla wood is available in the wood stores in the city of Mosul. The study aimed at the effect of decay fungi on some local commercial woods, including populus and Eucalyptus The results of the field survey of wood stores in the city of Mosul showed that most of the wood was infected with brown rot fungus. As the severity of the infection varied in different proportions, the percentage of infection of populus wood columns was 75%, and the percentage of infection of Eucalyptus wood columns was 40%. The fungus Neoscylitiadium dimidiatum penz. caused a decrease in the dry weight of populus wood and Eucalyptus columns from the first month of incubation and continued gradually until the fifth month As the percentage of loss in the fifth month was 4.41% for the populus poles, and the percentage of loss was 3.33% for the Eucalyptus poles. The increase in the losses in the weight of the sap wood continued during the incubation stages and to a greater degree than the increase in the loss percentages in the heart wood.