桉树缺硼病及其防治李波桉树缺硼病主要危害幼林。起初，笔者认为此病是病毒或病菌引起的，但在显微镜下多次观察，均没有发现菌株，对林木多次使用各种化学药物也不见效。后来，笔者发现桉树树梢仍有枯梢和桂条肿大现象，因此，断定不是侵染性病害，１９９３年４月通过移... Eucalyptus boron deficiency disease and its prevention and treatment of Li Bo Eucalyptus boron deficiency disease major hazards young forest. Initially, I believe that the disease is caused by a virus or bacteria, but observed many times under the microscope, no strains were found, the trees repeatedly use a variety of chemical drugs are not effective. Later, I found that the eucalyptus treetops are still withered and Guizhi swollen phenomenon, therefore, concluded that it is not an invasive disease, in April 1993 by moving ...