SPRAY MATERIALS 143 



COMMERCIAL LIME-SULPHUR SOLUTION. 



The commercial lime-sulphur solution is a good fungicide 

 when diluted to the proper strength. In fact it is universally 

 used on many of our fruits and particularly the apple. This 

 fungicide, however, is not very satisfactory in controlling 

 the rots, but it is good for the apple scab, the fly speck fungus 

 and some other diseases. 



The dilution of this fungicide is based upon the density 

 of the solution, the same as it is for the insecticide, except 

 that the spray must be much weaker as a fungicide than as 

 an insecticide. The table gives the dilution based upon the 

 degrees Baume of the commercial product. 



TABLE OF DILUTIONS FOR SUMMER SPRAY. 



Number of gallons of 

 water to 1 gallon 



Reading of of the lime-sulphur 



hydrometer, solution for summer, 



degrees Baume. spray of apples. 



33 40 



32 37 



31 36 



30 34 



29 33 



28 31 



27 29 



26 28 



25 26 



24 . . - 24 



23 23 



22 . . . 21 



21 20 



20 19 



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 : 



