128 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



sandy loam. These woods are very open and exposed, but 

 contain some excellent larch and Scots pine, measuring up to 

 60 feet and 55 feet high respectively, at an age of 80 to 90 

 years. 



A series of pure blocks of Scots pine, Corsican pine, Norway 

 spruce, and European larch from 21 to 23 years of age, growing 

 in Grey Yaud, gave opportunities for comparison. Ten years 

 ago the larch seemed hopelessly diseased, and it was decided 

 to thin vigorously. The trees have responded to the treatment 

 and are now doing fairly well. The Scots pine were badly 

 damaged by heavy clinging snow at 15 years old, but the 

 Corsican pine and spruce were not affected. 



The next compartment seen was a series of pure blocks of 

 Japanese larch, Sitka spruce, Douglas fir, and Corsican pine, 

 aged 9 years, on Witton Fell. All are doing well, the elevation 

 being from 875 to 1050 feet. 



In view of the difficulty of raising healthy crops of pure larch, 

 Lower Limekiln Bank was planted in the spring of 191 3 with 

 alternate lines of larch grown from Scottish seed and Corsican 

 pine, 4I feet apart. At present the larch is growing well, but in 

 case of its being attacked badly by canker, there will still be a 

 sufficient crop of Corsican pine. 



A part of East Hills plantation, consisting of pure Japanese 

 larch, 19 years old, which was awarded a first prize in the 

 Royal Show competitions in 191 2, provoked considerable 

 discussion. Many of the trees are now showing patches of 

 dead bark about the size of the palm of the hand, which are 

 most plentiful on the lower part of the stem where the branches 

 have been cut off. On removing the dead bark an oval patch 

 of bare wood is seen, which is apparently being rapidly occluded. 

 There is no flow or deposit of resin as in the ordinary larch 

 canker, and no fungal outgrowths are visible. The dead 

 patches of bark remain attached at their edges to the living 

 bark, and are being thrust outwards in line with the occluding 

 tissue. The attack was first noticed in the summer of 1916, 

 and is referred to in the September 192 1 number of the 

 Transactions of the Society as being probably due to the fungus 

 Phomopsis Fseudotsugae. Further investigations are being made, 

 and no doubt a fuller report will be given in the Transactions 

 in due course. 



Blaeberry Bank, comprising pure blocks of Japanese larch, 



