摘要
应美国同行的邀请,我们一行三人于1984年夏访问了威斯康辛大学(麦迪逊)、明尼苏达大学、纽约州立大学(塞拉库斯)、弗罗里达大学和加利福尼亚大学(伯克利)。此外,还访问了美国农业部林务局下设的北部林业中心试验站、西南太平洋林业试验站。
On a science tour to the U.S.,the authors visited the universities of Wisconsin (Madison) ,Minnesota,New York state,Florida and California (Berkeley)and two forest experiment stations of the U. S. Forest Service from May to Juny in 1984.The general situation of education and research concerned with forest pests presented. Much work being done on the pine blister rust, Dutch elm disease, root rot (caused by Armillaria mellea and Heterobasidion annosum) , Hylobius spp. and Dendroctonus spp. , and many new achievements made in these fields.
