558 Report oF THE HorTICULTURIST OF THE 
fungicides were: (1.) Potassium sulphide (one ounce to one gallon 
of water). (2.) Ammoniacal solution of copper carbonate (five 
ounces carbonate dissolved in three pints of ammonia 26 degrees 
then diluted to fifty gallons with water, and enough soap added to 
form a suds); (3) Kordeaux mixture (dissolve two pounds of 
copper sulphate, add whitewash made of one and one-half pounds 
fresh slaked lime, then dilute to twenty-two gallons with water 
and add enough soap to form a suds). 
The Bordeaux mixture proved most effective and the potassium 
sulphide least effective. Since the Bordeaux mixture is quite 
noticeable on the foliage some may prefer to use the ammoniacal 
solution for the last application before the plants blossom. 
The diseased spots on the leaves develop little pimples in which 
are borne numerous spores which are so minute as to be invisible 
to the naked eye and which readily float in the air or are washed 
on to the surrounding foliage by rains or by spray from the sprink- 
ler. The removal of spotted leaves is therefore a reasonable pre- 
caution to prevent the spread of the disease, and since such 
foliage is full of the disease germs it is best to burn it. ‘The 
treatment which may be expected to rid the plants of this dis- 
ease is briefly summed up as follows: 
(1.) Remove and burn diseased foliage. : 
(2.) Cover the remaining foliage with Bordeaux mixture to 
prevent the further development of the disease. Five or six 
applications will usually be sufficient to keep the foliage covered 
with the Bordeaux mixture through the season, especially if the 
soap is used. The object of using the soap is to cause the mix- 
ture to spread in a thin film over the entire surface of the leaf. 
Our experience has been that, applied in this way, the mixture 
adheres so well to the foliage that it is not necessary to make 
another application till there i is sufficient new growth et | 
to justify another treatment. 
The following account of an experiment will perhaps show more 
clearly the efficiency of Bordeaux mixture for chrysanthemum 
leaf blight as compared with ammoniacal solution of copper car- 
bonate. : eps 

