By Mr. John Robertson. 179 



applied with so little trouble, it is unnecessary to have re- 

 course to any thing else ; it is usually prepared by mixing it 

 with soap suds, and then applied by dashing it violently with 

 a rose syringe against the tree and wall, in such a manner 

 that no part or leaf is left unsprinkled ; the viscidity of the 

 seeds attaches the sulphur to the leaves of the tree, as well 

 as to the wall, and as the sulphur lies sheltered in the crevi- 

 ces of the brick work, it emits powerful effluvia for some time, 

 which, it is probable, operate, besides the contact of the sub- 

 stance, in destroying, by its corrosive property, the tender 

 fructification of the mildew. 



When trees have been severely attacked by the disorder, 

 they should be syringed on the first unfolding of the leaf, 

 and at frequent intervals during the remainder of the season, 

 perhaps once a week. By the continuance of such treatment, 

 and close cutting out the infected shoots, it will be completely 

 subdued and eradicated, though such leaves as have been in- 

 jured, will still continue to retain the appearance of disorder. 

 The sulphur, instead of being in any degree hurtful to the 

 Peach tree, seems rather to promote its growth. The col- 

 lateral autumnal shoots being particularly liable to catch 

 the infection, should be carefully nipped off as they push. 



Blight. Under this denomination are frequently confoun- 

 ded two varieties of disease materially different in their ap- 

 pearance, and which I shall distinguish by the appellations 

 of Blister and Curl: the former is generally confined to such 

 Peach trees as have glandular leaves, which are mostly sub- 

 ject to it in the months of April and May, and when attacked, 

 it is not until the latter part of the season, if at all, that they 

 become healthy and convalescent. The leaves of trees so 



