意大利现有杨树人工林15万公顷(225万亩),占全国森林总面积的2.5％。每年生产木材300万立方米,为全国木材年产量的50％。北部的波河流域地势平坦,温度适宜,土壤肥沃,灌溉便利,全国90％以上的杨树集中栽植在这里,是意大利杨树生产的重要基地。 杨树病虫害是影响杨树速生丰产的重要因素之一,特别是蛀干性害虫和叶部褐斑病对杨树的生长危害最大。为使杨树很好的生长,意大利十分重视杨树病虫害的研究和防治工作。在 The country now has 150,000 hectares of poplar plantations (2.25 million mu), accounting for 2.5% of the total forest area in the country. Annual production of 3 million cubic meters of wood, wood for the country’s annual output of 50%. The Po River basin in the north is flat, with suitable temperature, fertile soil and convenient irrigation. More than 90% of the poplar trees in the country are concentrated here and are an important base for poplar production in Italy. Poplar pests and diseases are one of the important factors affecting poplar fast-growing, especially the dry borer and leaf spot brown spot on the poplar growth is the most harmful. In order to make poplar good growth, Italy attaches great importance to poplar pest research and prevention work. in