1989年4月1日～23日,应我院邀请,美国南方林业实验站米勒(Miller)博士就化学除草剂在林业上的应用到我院进行了讲学。来自全国林业战线的46位代表来我院听讲。讲学期间,除了课堂教学、国内专家讲座、专题研讨外,米勒博士还和全体代表到思茅、西双版纳等地考察树木生长与竞争,泽兰蝇控制紫茎泽兰的生物防治杂草情况, From April 1 to April 23, 1989, at the invitation of our institute, Dr. Miller from the South American Forestry Experimental Station gave lectures on the application of chemical herbicides in forestry. Forty-six representatives from the national forestry front came to our hospital to attend the lectures. In addition to class teaching, lectures by domestic experts and special seminars, during the lecture, Dr. Miller also visited tree growing and competition with all the representatives in Simao and Xishuangbanna. Zeeman flies control weeds in the biological control of Eupatorium adenophorum,