144 SPRAY MACHINERY AND SPRAY MATERIALS 



COMBINATION OF SUMMER SPRAYS. 

 No. 1. 



Commercial lime-sulphur diluted 1 gallon to 40 gallons of water 

 Arsenate of lead . . 2 or 3 pounds to 50 gallons 



Nicotine sulphate . 1 part to 800 parts of the spray 



This combination can be made and applied at the same 

 time, if the conditions warrant it. The lime-sulphur is used 

 to control such diseases as the scab of the apple, the arsenate 

 of lead controls the codling moth or other eating insects, 

 and the nicotine controls the plant lice if there are any 

 present. It is a common practice to use the lime sulphur 

 and arsenate of lead combination in almost all of the spraying, 

 but the nicotine sulphate should not be used unless there are 

 insects present that require its use. 



No. 2. 



Bordeaux mixture 4-4-50 formula 



Arsenate of lead 2 pounds to 50 gallons 



Nicotine sulphate 1 part to 800 parts of the spray 



This combination is similar to the first one, except that the 

 Bordeaux mixture is substituted for the lime-sulphur solu- 

 tion. The Bordeaux mixture is preferable to the lime-sulphur 

 solution for certain diseases. The nicotine should not be 

 added unless there are insects present that require it. 



No. 3. 



Self-boiled lime-sulphur mix- 

 ture 10-10-50 formula 

 Arsenate of lead . 3 pounds to 50 gallons of the spray 



This combination is very satisfactory for spraying some of 

 the American and Japanese varieties of plums. 



Fumigation. — In addition to the common spray mixture 

 we recognize fumigation as a means of controlling diseases 

 and insects. Whenever fumigation is employed for the con- 

 trol of disease it is used in a special way. Formaldehyde 

 gas is the common fumigant used. The Maine formula for 

 formalin is : 



Formalin . . ... . . ... 3 pounds 



Potassium permanganate . . 23 ounces 



