cooperation with nursery ownerSe Both dormant and summer sprays and dusts have been 
cused, For the entire period 1932-1936 one copper fungicide (Corona Bordeaux) and 
four sulphur fungicides (Koloform, Kolodust, flotation sulphur dust, and dry wett- 
‘able flotation sulphur) have been used continuously on the same trees as summer 
| sprayse In 1935 tests were begun with two new copper fungicides (Instant Bordeaux 
and "Z-0") and one new sulphur fungicide (liquid lime sulphur). Instant Bordeaux 
‘and "Z-0" have been used both for dormant and for summer sprays. Liquid lime sul- 
phur has been applied only as a dormant spray and has been followed by summer appli- 
cations of Koloform and dry wettable flotation sulphur. These fungicides may be 
described as follows: 
A, Copper fungicides. 
1. Corona Bordeaux is a commercial, pre-mixed Bordeaux that only needs to 
be mixed with proper amounts of water to obtain required strengths. This fungicide, 
manufactured by the Corona Chemical Division of the Pittsburg Plate Glass Company, 
is composed of active ingredient (copper ) of not less than 13 percent and inert in- 
gredients of not more than 87 percent. 
Ze Instant Bordeaux is a recently developed Bordeaux that can be made 
very quickly and easily as needed by mixing blue vitriol (copper sulphate) powder 
and superfine hydrated lime with water in proper proportions, To prepare 100 gal- 
lons of 4-4-50 Instant Bordeaux, weigh out 8 pounds of powdered copper sulphate and 
8 pounds of superfine hydrated lime. Begin filling the spray tank with water. When 
the tank is approximately one-fourth full, start the engine and keep it running until 
Hehe tank is full. As soon as the engine is started, place the copper sulphate upon 
the intake strainer and wash it into the tonk,. When the tank is three-fourths fui. 
place the superfine hydrated lime on the intake strainer and wash it into the tank. 
es 
