446 NOTES ON UROMYCES AMYGDALT, COOKE, 



quite a variety of fruits here to which they were formerly 

 strangers. 



As might be anticipated, this fungus has its pecuUarities of 

 attack. In my own garden, for instance, the peach and plum 

 trees were badly affected, while an apricot whose branches inter- 

 laced with an affected peach tree had not a speck upon it. In 

 the Royal Horticultural Gardens, Burnley, apricot and almond 

 trees are as yet unaffected, and in 1890-91 not even plums were 

 attacked, only peaches. J. G. O. Tepper, of Adelaide, informs 

 me that in his garden the apricots are very badly affected year 

 after year, peaches to a slightly less extent, and a plum tree with 

 the branches touching other diseased trees is wholly unaffected. 

 In contrast to this, there is the case already mentioned where the 

 peach trees were unaffected and the plum trees more or less 

 attacked. No doul^t the variety of the respective trees will have 

 an important influence on the immunity from or liability to 



disease. 



Varieties most Affected. 



In the Ro}al Horticultural Gardens, Burnley, where so many 

 different varieties are grown, I was able, with the assistance of 

 Mr. Neilson, to select some of those most affected. Kerr's Slip- 

 stone, Royal George and Crimson George are very liable among 

 peaches, and Darwin and Dante among nectarines. Seedling 

 peaches are also badly attacked. 



Plums such as Late Harvey and Imperial Ottoman were pretty 

 bad, and it was very noticeable that all those provided with 

 thorns, such as the French Cherry Plum, seemed to enjoy com- 

 parative immunity from the disease. 



Distribution. 

 This disease has a very wide distribution, possibly co extensive 

 with the cultivation of the peach and allied fruits . It has actually 

 been found in Britain, France, Germany, Italy, Austria, Belgium, 

 Switzerland, North America, Canary Islands, India, Cape Colony 

 and Australia. As regards its local distribution in Victoria, it 

 extends from the Murray to the sea — from Rutherglen in the 

 north to Warrnambool in the south. 



