2l6 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY. 



produce a flow of resin, but giving no evidence of fungous 

 growth ? 



27. Have you any knowledge of the first appearance of disease 



in your locality ? 



28. Have you ever received diseased plants from a public 



nursery ? 



B. — Siberian Larch (Z. sibirica). 



1. Is this more, or less, liable to disease than the common 



European species ? 



2. Is it more, or less, liable to injury from frosts than the 



common European species ? 



3. Is it liable to attack by Aphis or other insects ? 



C. — Japanese Larch (Z. leptolepis). 



1. Have you observed disease on this species? 



2. Is it liable to injury from late spring, summer, or early 



autumn frosts ? 



3. Is it liable to attack by Aphis or other insects? 



Note. — In this Schedule, wherever the term "disease" occurs, it 

 refers to the diseased condition of the stem and branches of 

 the larch known as "Canker"' or "Blister." 



In giving a short resume of the replies to the questions 

 submitted to observers, the sub-committee desire to say that 

 this is not intended to deal with all the points touched upon, but 

 merely to indicate the general trend of the result of the investiga- 

 tion — so far as it has gone. Many of the observations recorded 

 in the replies are of such a nature as to suggest cases for further 

 investigation, a process which may involve considerable time, 

 and until this is accomplished the committee cannot hope to 

 place before the Society the final result of their inquiry. 



Common Larch. 



One point which has been brought out in connection with 

 disease of the common larch is that it is more or less prevalent 

 in all the localities from which reports have been received, and 

 that it occurs on all kinds of geological formations, and on all 

 kinds of soil ; but in a few cases, which seem to call for further 

 investigation, the character of the formation, as reported, seems 



