Nrw York Agricultural Experiment Station. 628 



To prepare for use : To evei'y gallon of this resin mixture, made 

 according to the second formula, add four gallons milk of lime, 

 sixteen gallons of water and four ounces of Paris green. To dis- 

 tinguish this mixture from the resin mixture we will call it 

 resin-lime mixture. 



The milk of lime is made by slaking a quantity of stone lime 

 and adding enough water to make a thin whitewash. About 

 one-half pound of stone lime will make four gallons of white- 

 wash, depending on quality of stone lime used. When the lime 

 is added to the resin mixture the latter flocculates, or forms a 

 suspended form of hard soap in the water. The Paris green, or 

 London purple, whichever is used, adheres to the flocculated 

 mixture and does not settle to the bottom. If an excess of lime 

 is added to the mixture it will settle and will also clog the 

 nozzles of the spraying apparatus. It is always best to have a 

 slight excess of the resin mixture, as it aids in forming a soapy 

 film on the surface of the leaves, which holds the particles of 

 lime and poison until the lime dries. 



This poisoned resin-lime mixture will stick to the under as 

 well as to the upper surface of the leaves. Two or three heavy 

 rains are often required to remove all of it, even on the upper, 

 exposed portions of the leaves. The main disadvantage in using 

 this mixture is that at times it gums up the valves, especially 

 rubber ball valves, and the packing of the plunger of the spraying 

 outfit so that they have to be renewed or cleaned frequently. 

 Apparently this trouble is more likely to occur if the resin is not 

 thoroughly saponified. 



An excess of Paris green is recommended for two reasons. 

 First, it is thought that the lime counteracts the action of the 

 poisoo. Second, cabbage and related plants can not be drenched 

 without wasting the material, and as only a slight film of the 

 mixture adheres, it is necessary to have it carry all the Paris 

 green it possibly will. 



If the first formula given is preferred, enough water Should be 

 added to make 400 gallons; then all that is necessary is to add 

 lime and Paris green in the right proportions to the amonnt of 

 resin mixture used. 



