374 MISSOURI STATE HORTICULTURAL SOCIETY. 



or injected among roots that are being infected. Against insects dam- 

 aging stored grain or museum material a small quantity is used in an 

 air tight veseel. 



Carholic Acid. — A solution of one part in 100 of water is used 

 against parasites on domestic animals and in their barns and sheds; 

 also on the surface of plants and among the roots in the ground. 



Hellebore. — The powder is sifted on alone or mixed one part to 20 

 of flour. With 1 gal. of water \ lb. is mixed for spraying. 



Kerosene. — Milk Emulsion : To 1 part milk add 2 parts kerosene,, 

 and churn by force pump or other agitator. The butter-like emulsion 

 is diluted ad libitum with water. An easier method is to simply mix 

 1 part kerosene with 8 of milk. Soap Emulsions In 1 gal. hot water 

 •^Ib. of whale oil soap is dissolved. This, instead of milk, is mixed to 

 an emulsion with kerosene in the same manner and proportion as 

 above. 



Pyrethrum: Persian Insect Powder. — Is blown or sifted on dry ; 

 also applied in water, 1 gal. to a tablespoonful of the powder, well 

 stirred and then sprayed. 



Tobacco Decoction. — This is made as strong as possible as a wash, 

 or spray to kifl insect pests on animals and plants. 



Prof. Cook finds that flies don't like the air in his stable, owing to 

 the fact that he keeps his barrel of carbolic acid and soft soap — used in 

 destroying insects — there. Flies will always run away from this mix- 

 ture. 



It is my belief that copper in the soil, derived from the prevfous 

 liberal use of Paris green to kill the potato beetle, destroys the germs 

 that cause the potato rot ; in the same way, a one per cent, solution of 

 sulphate of copper in water (four pounds to the 50 gallons) has been 

 found eff'ective to arrest the progress of mildew on the foliage and to 

 prevent the rot of the fruit in the wine districts cf Continental Europe. 



I dwell on this point because I think a preventive of potato mil- 

 dew and rot and grape mildew and rot is to be found in sprinkling, 

 foliage and fruit with a one per cent, solution of sulphate of copper 

 (bluestone) in water early in June, and again once or twice during the 

 growing season. I am quite confident, too, potato rot will not be 

 found t;i be common where Paris green has been used for two or three 

 years in succession, and also that the treatment of the vines of a given 

 crop with Paris green two or three times in the growing season will 

 prove a preventive to a measurable extent. — B. F. Johnson, in Rural 

 New Yorker. 



