~sl 
very similar to Koloform but is applied as a dust. It is composed of active ingred- 
ient (sulphur) of not less than 87 percent and inert ingredients of not more than 13 
percent. A portion of the sulphur in Kolodust and also in Koloform consists of 
| 
highly colloidal sulphur produced by the adsorption of molten sulphur into Bentonite 
claye 
2. Koppers Flotation Sulphur Dust is similar to Koppers Flotation Sul- 
phur but is used as a dust. 
| Methods 
| The trees received three types of treatment, and ample provision was made 
for maintaining untreated trees as checks against the treatments, The types of 
treatment were as follows; 
1. Pruning: Diseased parts of infected trees in test blocks were pruned 
out and destroyed. 
2. Fungicides: Trees in test blocks were sprayed or dusted with the 
proper fungicides. 
| 
3. Pruning plus fungicides: Diseased parts of infected trees in test 
“blocks were pruned out and destroyed. After that, the trees in such blocks were 
| sprayed or dusted with the proper fungicides. 
From the beginning of the work in 1932 until the fall of 1935, applica- 
“tions of the liquid fungicides were made with the sprayers owned by the nurserymen 
at each place where a plot of trees was located. These sprayers varied from 50- 
gallon hand operated outfits to 100-gallon power outfits, But since the fall of 
1935 all spraying has been done with a 100-gallon Bean Little Giant Duplex outfit. 
w4— 
el 
