Hallo, I hope I am not very late in answering this. I did some similar studies for my Undergraduate report. So can you contact the Forest Dept. of Moi University, Eldoret, Kenya. Also, the Dean of Forestry, Pro. Sang and Dr. H. M. Ivory did lots of work on Diplodia in Kenya. Another source is Dr. Collins Miller, the last time I heard of him was in 1992; check with Aberdeen University (Scotland) for further information. I don't know specific addresses but try the University contact. All the best.
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