SPRAYING 63 



A NEW FUNGICIDE. Some orchardists are now 

 using the following self-boiled lime-sulphur spray (or, 

 sometimes, a very dilute form of ordinary lime-sul- 

 phur, see page 66), claiming that it is less liable to 

 spot or burn fruit and foliage: 



Put eight pounds unslaked lump lime in a barrel; 

 add enough water to cover. When the lime begins to 

 heat, throw in eight pounds of flowers of sulphur. 

 Constantly stir and gradually pour on more water un- 

 til the lime is all slaked; then add the rest of the 

 water to cool the mixture. About fifty gallons of 

 water, in all, are required. Strain. 



Two pounds of arsenate of lead may be added, if 

 desired, to the finished mixture, which then becomes 

 a combined fungicide and insecticide, and may be used 

 in the same manner as advised for Bordeaux-arsenate 

 of lead. 



(Special note: The self-boiled mixture is not the 

 same as the lime-sulphur advised for San Jose scale, 

 which is too strong for trees in foliage.) 



FOR SUCKING INSECTS. Now we come to a class 

 of insecticides suited to insects which suck a tree's 

 juices but do not chew. Arsenic will not kill such 

 pests; therefore we must resort to the following solu- 

 tions which kill by contact : 



Kerosene emulsion: One-half pound of hard or 

 one quart of soft soap; kerosene, two gallons; boiling 

 soft water, one gallon. If hard soap is used, slice it 

 fine and dissolve in water by boiling; add the boiling 

 solution (away from the fire) to the kerosene, and stir 

 or violently churn for from five to eight minutes, 

 until the mixture assumes a creamy consistency. If 



