SPRAY MATERIALS 137 



Combination Insecticides and Fungicides. — There are insects 

 and diseases which attack certain crops about the same time. 

 Whenever such a condition is found, a combination of both 

 an insecticide and a fungicide can be sprayed on the plants 

 as one spray. By this practice the work of spraying is 

 greatly decreased. 



The combinations vary, depending upon the plant and the 

 injury which is being done. A few of the combinations which 

 can be made are as follows: 



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 most 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 



