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