No. 6 DEPARTMENT OP AGRICULTURE. 54d 



bugs and red spider, wx-aker preparations will prove effective. Cur- 

 rant worms and all insects wliicli liave soft bodies, can also be suc- 

 cessfully treated. Use soft water in malving soapy emulsions of oil. 

 in limestone sections where hard water is the rule, better results 

 will probably be obtained by using the sour milk solution, which 

 it, simply two gallons of kerosene and one gallon of milk, emulsified, 

 by passing through a pump. Kerosene and water may be used in 

 all cases where kerosene emulsion is mentioned. Dilute to the 

 strength recommended for the emulsion in each case. It must be 

 applied with a pump having a kerosene attachment. 



Tobacco Water ^ Tobacco Bust and Sitlphnr. — Water in which to- 

 bacco stems have been steeped for a few hours is a standard remedy 

 for plant lice and other soft-bodied insects. Dilution is made three 

 to fivefold before application. Tobacco dust has been found effec- 

 tive against root aphids, when used freely in trenches around in- 

 fested trees. Dry flowers of sulphur applied with a bellows while 

 the leaves are moist proved effective against plant lice. 



Lime- Salt- Sulphur. — This preparation stands in the front rank 

 as a contact insecticide for application to dormant trees and has 

 also a fungicidal effect particularly noticeable in its eft'ect upon the 

 fungus causing the leaf curl of peaches. The formula has been modi- 

 fied without marked variation in effectiveness and the salt is some- 

 times omitted. Apply any time when the trees are dormant, but not 

 when the temperature is so low that the spray freezes as applied. 

 A second application to cover places untouched is advised even 

 when much care has been used at the first spraying. The prepara- 

 tion is made as follows: 



Twenty pounds best unslaked lime; seventeen pounds sulphur 

 (liowers); ten pounds of salt, for fifty gallons of water. Heat from 

 Ave to seven gallons of water in an iron caldron and while this is 

 heating sift the sulphur. Put the lime in the water which will cause 

 a violent boiling, and add the sulphur, stirring continuously. If too 

 much water is used, boiling over ensues, and if too little, the mass 

 becomes dry and additional supply of hot water should be at hand 

 from which to replenish as required. Continue boiling for an liour 

 or until the lime and sulphur have united, when the color will be a 

 deep amber. The salt is then added and the kettle filled with hot 

 water; strain before use. Give pumps and nozzles an immediate 

 cleaning when spraying ceases. Where live steam is available it 

 may be used for cooking the mixture in place of the fire to great 

 advantage. 



Caustic Soda TlasA. — This is a new remedy for scale insects thus 

 far but little tested except on the Pacific Coast. Tt is recommended 

 for expei'iinental tests only. The formula is eight pounds of caustic 

 soda (78 per cent, pure) to fifty gallons of water. 



