论文部分内容阅读
中东杨(Populus berolinensis)叶锈病(Melampsora larici-populina kleb)广泛分布在黑龙江省各地,为幼苗、幼树的重要病害之一。一般的发病率常达40—100％,各年份的发病率及危害程度都不相同。发病轻时,妨碍叶片进行光合作用并夺取养分,使生长势衰弱以至早期落叶,发病重时使幼苗枯死。 为探球杨锈病的发病规律及防治措施,为生产上提供一些防治方法,以保证杨树幼苗、幼树的速生丰产,自1960年起,黑龙江省林业科学院、东北林学院及龙江县绿色海洋林场共同开展了中东杨叶锈病的研究,1961年进行了化学防治试验,现将试验结果报导如次。
Populus berolinensis leaf blight (Melampsora larici-populina kleb) is widely distributed in Heilongjiang Province, which is one of the important diseases of seedlings and saplings. The general incidence of up to 40-100%, the incidence of various years and the degree of harm are not the same. When the disease is light, it hinders the leaves from photosynthesis and seizes nutrients, weakens the growth potential and even leaves the leaves early. When the disease occurs, the seedlings are dead. In order to explore the incidence of Yang rust disease and prevention measures for the production to provide some control methods to ensure poplar seedlings, saplings fast-growing, since 1960, Heilongjiang Academy of Forestry, Northeast Forestry College and Longjiang County green Ocean forest farm jointly carried out the study of young leaf rust in the Middle East, chemical control test in 1961, now the test results reported as follows.