77 
Plate XIV. 
An almond grove near Orange, Cal., prematurely stripped of leaves during July, 
1891, through the action of Cercospora circumscissa Sacc., combined with the lack of 
sufficient moisture. Many terminal twigs of last year’s growth are dead and dry. 
From photograph, August 5, 1891. 
SUGGESTIONS IN REGARD TO THE TREATMENT OF CERCOSPORA 
CIRCUMSCISSA. 
By B. T. Galloway. 
■ As stated by Mr. Pierce, no experiments of consequence looking to¬ 
ward the prevention of the disease under consideration have been made 
in this country. Some work, however, along this line has been under¬ 
taken in Australia, while a number of diseases of a similar nature are 
successfully treated every year in the eastern part of the United States. 
Prom these facts and from the life history of the fungus causing the 
almond disease, which Mr. Pierce has so fully set forth, we are able to 
make some suggestions in regard to treatment. In the first place it 
must be borne in mind that the foliage of the almond and peach is easily 
injured by both fungicides and insecticides. Bordeaux mixture, which 
we use successfully in combating various diseases of the pear, cherry, 
and quince, and which never injures the foliage of these plants, under 
certain conditions has been known to sometimes kill the leaves of peach 
trees and even in some cases to destroy young wood, fruit, and dowers. 
In our experience the ammoniacal solution of copper carbonate has 
proved the safest and best fungicide for the peach and almond. The 
formula we shall adopt in all our work the coming season is as fol¬ 
lows : 
Copper carbonate.ounces.. 5 
Aqua ammonia (26°).pints.. 3 
Water. gallons.. 45 
The copper carbonate should be placed iu an ordinary wooden pail 
and just enough water added to make a thick paste. Then pour in the 
ammonia and stir until all the copper is dissolved. If 3 pints of am¬ 
monia is not enough to thoroughly dissolve all the copper add a suf¬ 
ficient quantity to bring about this result. When completely dissolved 
pour the copper solution into a barrel holding 40 or 45 gallons, thenlill 
the barrel with water. Where there are a large number of trees to 
treat we lind it very convenient to prepare the concentrated ammoniacal 
solution in advance. This can be done at leisure, taking care always 
to put the liquid into a tightly corked jug or demijohn as soon as it is 
made. When ready to spray take the concentrated fluid into the held 
and for every three pints add 45 gallons of water. 
In order to protect the foliage from the attacks of the Cerco.spora it 
would probably be best to begin the application of the jiumoniacal so- 
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