SPRAYS FOR SUCKING INSECTS 287 



It is always advisable to use lime with Paris green to 

 prevent burning and to help the Paris green to adhere 

 to the foliage. This spray is used on the potato vines to 

 control the potato beetle more than for any other purpose. 

 Formula : 



Paris green \ Ib. 



Stone lime 2 Ib. 



Water 50 gal. 



Hellebore. Hellebore is the powdered root of a plant. 

 It kills insects both by contact and as a poison applied 

 on the foliage. Since it is not so strong a poison as the 

 arsenical compounds, it may be used with greater safety 

 a short time before the fruit ripens. It is used chiefly 

 against the currant worm. 



Formula : 



Hellebore i Ib. 



Water 25 gal. 



SPRAYS FOR SUCKING INSECTS 



Strong Lime-sulphur Solution. There are various 

 formulas for making the lime-sulphur solution for scale 

 insects, but the following is an old favorite formula that 

 has been used by fruit growers for many years and is still 

 considered very satisfactory. 



Formula : 



Lump lime 20 Ib. 



Sulphur 15 Ib. 



Water 50 gal. 



After weighing out the proper amount of stone lime and 

 sifting 15 pounds of sulphur, the lime is poured into the 

 cooking tank which contains 5 or 10 gallons of boiling 

 water, and the sulphur is then added. Enough cold water 



