78 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



shire, but cannot as yet be said to be a serious pest. The 

 Phoma is generally on the leader shoots of the young plants, 

 and it is difficult to say whether frost may not be the original 

 cause of death. In one locality (Drumtochty) it was observed 

 lower down the stems of the plants, about six years old, 

 where the pycnidia were developed abundantly on sunken 

 patches of reddish colour as if the part had been 

 scorched." 



From the above notes it may be concluded that Fhomopsis 

 Pseudotsugae has been present in the country for a considerable 

 number of years. Judging from the small number of records, 

 however, it appears that at first the disease was not widespread, 

 and it is only within the last ten to twelve years that accounts 

 of its occurrence in various localities have been received. 

 There is little doubt that the actual damage done by the 

 disease has also increased recently, and that this cannot be 

 altogether accounted for by the increased area now under 

 Douglas fir. 



These views have recently received confirmation by the 

 discovery of the disease in various localities in England. 

 In a note published in the Gardeners' Chronicle (vol. Ixix., 

 No. 1778, 22nd Jan. 1921, p. 45), Mrs N, L. Alcock records the 

 disease from Hampshire, Surrey, Sussex, and Berkshire, and 

 here the effects appear to be very similar to those observed 

 in Scotland. The author emphasises the destructive nature of 

 the disease and states that it is causing serious loss in the 

 Douglas fir plantations in England. 



Investigations on the life-history of Fhomopsis Pseudotsugae, 

 and its effect on the Douglas fir are being continued, and it 

 is proposed to publish an account of these, together with 

 additional notes on the distribution of the disease, in the 

 next number of the Transactions. 



The occurrence of Botrytis Douglasii on the Douglas fir was 

 recorded by both Messrs Leven and Farquharson in the notes 

 referred to above, and this disease is described as common in 

 England by Mrs Alcock. Botrytis Douglasii is widespread in 

 Scotland, and care should be taken to distinguish its effects 

 from those produced by Phomopsis. 



I wish to thank Messrs George Leven and P. Leslie for 

 drawing my attention to the above records. 



Malcolm Wilson. 



