CoLOKADO Plant Diseases 
87 
4. Cover the barrel to retain the heat and let stand for five to 
ten minutes. 
5. Add at least 25 gallons of cold water with vigorous stirring 
as soon as the lime is thoroughly slaked. It is important to 
cool the preparation as soon as the lime is completely slaked. 
6. Dilute to 20 gallons or keep as a stock solution and dilute in 
proportions as needed. 
7. Strain through a cloth or 20-mesh wire gauze before putting 
into the spray tank. 
Both lime-sulfur and Bordeaux mixture as well as any other 
spray should be applied with a good pressure spray pump. A nozzle 
that will break the spray into a fine mist is necessary. Good spray 
pumps of many sizes and types can be bought on the market to 
suit the purpose of any grower. 
Commercial Lime-Sulfur 
Commercial lime-sulfur is another valuable fungicide, especially 
as a dormant spray. This spray differs from the self-boiled lime 
sulfur in that it is boiled over a fire instead of by the heat of the 
slacking lime. It usually is prepared in the factories in concentrated 
solutions. Buy the concentrated mixture and dilute according to 
directions supplied by the manufacturers. 
Ammoniacal Copper Carbonate 
This is a spray that is often used late in the season when it is 
desired not to spot the fruit or foliage with Bordeaux mixture. The 
spray is prepared as follows: 
1. Add enough water to 5 ounces of copper carbonate to make a 
thin paste. 
2. Dissolve the paste in three pints of ammonia diluted with 2 
gallons of water. 
3. -Add water to make 45 gallons. 
Flowers of Sulfur 
The application of flowers of sulfur is recommended for the con- 
trol of many diseases, especially the powdery mildews. The sul- 
fur is applied in the form of fine dust. It may be applied on a small 
scale by dusting from a pepper box, but when applied extensively 
a special form of bellow-blowers should be used. 
Formaldehyde 
This fungicide is used chiefly for seed disinfection. The solution 
can be purchased in strengths approximating 40%. One pint of 
