Depart -MKXT of Plant Paihoi.ocv. 427 



Clear Copper Sulfate Solution. 



Made by dissolving copper sulfate crystals in varying amounts of water depend- 

 ing upon the disease to be sprayed for and the time or season when the application 

 is to be made. Usually applied to more or less dormant trees 2 lbs. to 50 gal- 

 lons is effective against Peach Leaf Curl. Should not be applied to plants in foliage. 



Potassium Sulfid. 



Potassium sulfid (Liver of sulfur) , 3 oz. 



Water 10 gals. 



Make just before using, as it loses strength on standing. Particularly valuable 

 for the powdery mildews of plants. Effective for the control of the following: 

 Carnation Rust (i oz. to i gal.), Gooseberry Mildew, Cherry Mildew, Phlox Mil- 

 dew, etc. 



Sulfur. 



This is often effectively used in the control of Mildews. It is dusted thoroughly 

 over the plants especially when they are wet. Most effective in dry hot weather. 

 In Rose Houses it is mixed with half its bulk of lime and made into a paste with 

 water. This is painted on the steam pipes. The fumes destroy the mildew on 

 the roses. Mixed with lime it has proven effective in the control of onion smut 

 when drilled into the rows with the seed. Also shown to be effective in preventing 

 potato scab on infested land. Scatter in furrow at planting 300 lbs. to an acre. 



Lime. 



Not usually effective as a fungicide. Has been used as spray to prevent leaf 

 curl of peach. Liming the soil with stone lime 2 ^ to 5 tons to the acre has proven 

 very effective in controlling the club root of cabbage and turnips. Apply at least 

 3 months before planting the crop, i to 4 years is better. 



Lime-Sulfur Wash. 



The lime and sulfur wash used in spraying for San Jose Scale is also quite effective 

 as a fungicide especially in preventing leaf curl of peach. A modified form of this 

 wash known as the "self cooked" lime-sulfur wash is now being recommended for 

 the spraying of peaches, plums, apples, etc., in foliage. It is said to cause no injury 

 to the leaves or fruit. It has given good results in controlling Brown Rot and 

 Scab of peaches. It is prepared as follows: 



Place ten lbs. of sulfur and 15 lbs. of stone lime in a barrel. Add hot water 

 slowly to slake the lime, keeping the mass wet but not submerged. Stir occasion- 

 ally. Part of the large lumps of lime may be kept out at first and added after 

 slaking has progressed to some extent, thus prolonging the slaking and heating. 

 When slaked dilute to 50 gallons. Apply as you would Bordeaux. 



SOLUTION FOR SEED TREATMENT. 

 Formalin. 



This is a gas dissolved in water and comes of the strength of 40 per cent. 

 Should cost about 30 cents a pint or pound, i pmt diluted in 30 gallons of water 

 is used effectively in preventing potato scab (soak tubers for an hour and a half 



