6i6 Bulletin 283. 



Sulfur has been found to possess considerable value as a fungi- 

 Sulfur. cide. The flower of sulfur may be sprinkled over the plants, 



especially when they are wet. It is most effective in hot dry 

 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 mildew 

 on the roses. Mixed with lime, it has proved effective in the control of onion smut 

 when drilled into the rows with the seed. Sulfur is not effective against black-rot 

 of grapes and many other diseases. 



Corrosive sublimate i oz., water 7 gals. An effective solution 



Corrosive for potato scab. Soak seed potatoes one and one-half hours. 



sublimate It is also a good antiseptic for dressing wounds. After cutting 



solution. out fire-blight or canker, swab the wotind thoroughly with this 



solution. ' 



This is a gas dissolved in water. Commercially, it has a strength 



Formalill. of about 40 per cent. One pint dissolved in thirty gallons of 



water is used effectively in preventing potato scab (soak tubers 



for two hours and plant in clean soil), or smut of oats and stinking smut of wheat 



(soak seed in solution for ten minutes, drain and sow the next day). 



Resin 2 lbs., sal soda (crystals) i lb., water i gal. Boil until 



"Sticker" or of a clear brown color — one to one and one-half hours. Cook in 



adhesive. iron kettle in the open. Useful for onions, cabbage and other 



plants hard to wet. Add this amount to each fifty gallons of 



Bordeaux. For other plants, add this amount to every one hundred gallons of 



the mixture. This mixture will prevent the Bordeaux from being washed off 



by the heaviest rains. 



The smuts of certain cereals may be controlled by the use of 

 Hot water. hot water in treating the seed. The following so-called "modi- 

 fied Jensen method" is recommended in Bulletin 152, Bureau 

 of Plant Industry, for treatment of seed for loose smuts of wheat and barley. This 

 applies only to treating small quantities of seed for a seed plat from which clean 

 seed for the general crop may be obtained. 



"The seed should be soaked for five to seven hours in water of ordinary room 

 temperature, 17 to 22° C. (63" to 72° F.). It should be placed in small loose sacks 

 or wire baskets containing not more than one-half peck each and drained for a 

 short time. It is of the greatest importance that the seed should be treated in 

 small lots in order that all the grain may be quickly and uniformly brought to the 

 desired temperature. Two tubs or vats of water should be provided. In one 

 tub (No. 2) the exact temperature required should be maintained. The other 

 tub (No. i) is used for bringing the grain to the temperature of the treatment, so 

 as not to lower the temperature in tub No. 2. Galvanized iron tubs of 20 to 

 40 gallons capacity and kerosene or gasoline double burner stoves are sufficient 

 for the treatment. The drained sacks or baskets of seeds should be plunged into 

 tub No. I for a minute, then transferred to tub No. 2 and kept agitated while 

 immersed at the temperatures and for the periods specified below, the temperature 

 mentioned being maintained as nearly as possible. 

 For barley, 15 minutes at 52° C. (125.6° F.) 

 For wheat, 10 minutes at 54° C. (129.2" F.) 

 "In treating barley, if the temperature should rise above 52' C. (125. 6" F.) the 

 time of immersion must be reduced to ten minutes at 53° C. (137.4** F. ) or five 



