18 穿孔虫類による松の被害樹型 : 松の枯れ方に對する一考察
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概要
- 論文の詳細を見る
The total loss of forest resouces, in last Nov. due to pine bark beetles et. c. in Japan, are estimated as follows : Areas 37,206 (Cho), Trees 3,360,764 (Hon), Volume 1,482,268 (Koku).These losses occurs by injury of about ten species, it has different outside of injuries, and differences it's treatment of control, so that the writer classified 11 types for convenience sake.The relation between type and treatment of injured trees are as follows : (Table 1)
- 一般社団法人日本森林学会の論文
- 1950-03-25