EXPERIMENT STATION BULLETINS. 



361 



PARIS GREEN AND LIMB. 



Alwaj'S use lime -with Paris green, it makes the poison stick better, 

 besides greatly reducing the danger of burning the foliage. 



For spraying from a barrel, the writer has found the following method 

 very useful : Place from one-quarter to one-half pound of good lump 

 lime, or unslaked lime, iu each of three or four tin pails which will 

 hold about three quarts or less. Old cans or crocks will answer just as 

 well. Add enough hot water to slake it into a thin cream or paste. 

 Now add to each lot, one-quarter pound of Paris green, previously 

 weighed out, and placed in paper bags, stir while the lime is hot and 

 allow to stand for some time. Now measure out about forty-four gallons 

 of water in your spraying barrel, and make a mark that will show 

 how high it comes in the barrel, add the contents of one tin pail (vi;!;., 

 one-quarter of a pound of Paris green and one-half pound of quicklime 

 slaked) into the forty-four gallons of water in the barrel. Stir well and 

 spray. The pails or crocks can be used one at a time and refilled occa- 

 sionally so that the stock is always on hand ready for use. 



ARSENITE OP SODA — KEDZIE FORMULA. 



This form of poison was originated at this Station by the late Dr. 

 R. C. Kedzie. 



This is a cheap, effective poison that can be prepared at home. It 

 is used by many of the grape growers of Michigan in combination with 

 the Bordeaux mixture. It cannot be used in the lime-sulphur sprays. 

 If used alone — as is sometimes done for potato bugs — slaked lime must 

 be added or the foliage will be burned. 



The formula is: 



White arsenic 2 pounds 



Sal Soda (commonly called washing soda) 8 pounds 



Water 2 gallons 



Boil these materials in any iron pot or kettle not used for other pur- 

 poses for about 15 minutes or until the arsenic dissolves, leaving only 

 a small muddy sediment. Put this solution into a jug or other vessel 

 that can be closed tightlv and label ^'Poison." 



