意大利的杨树病害比虫害发生严重,在生产上造成的损失也较大。因此,意大利对杨树病害的研究特别深入细致,在生产实践中也十分注重作好预防和防治工作。尤其是在选育抗病品种的研究方面取得了突出的成绩。现将意大利杨树主要病害种类,发生情况及其防治技术措施介绍如下: 一、根部病害1.根朽病Armillaria mellea (Vzhl.)Quelet. 分布在意大利的中、南部,苗圃和林地内均有发生。被害树根常形成根状菌索,通过侧根侵入树木的形成层和韧皮部,使木质表面变成黄褐 Poplar disease in Italy than pest serious, resulting in the loss of production is also greater. Therefore, the study of poplar disease in Italy is particularly intensive and meticulous. In the practice of production, great attention has been paid to prevention and control. In particular, remarkable achievements have been made in the research of breeding resistant varieties. Now the main types of poplar in Italy, the occurrence and prevention and control measures are as follows: First, the root disease 1 root disease Armillaria mellea (Vzhl.) Quelet. Distribution in Italy in the south, nurseries and woodland are occur. Roots of the victim often form rhizobacteria, through the lateral roots invade the formation of the tree and phloem, the wooden surface into yellow brown