228 NEBRASKA STATE HORTICULTURAL SOCIETY 



will begin laying green eggs that soon turn black upon the apple twigs. 

 The freezing nights in November or early December kill all the lice and 

 the eggs live over to hatch the following spring. 



Remedies 



Treatment for this insect may be for the destruction of the eggs and 

 young lice before the buds open in the spring, or for the destruction of 

 the lice upon the leaves during the growing season. 



Kerosene emulsion in all our experiments has proven useless for the 

 destruction of the eggs except when applied so strong as to make it 

 entirely impractical to use it. 



The Lime-Sulphur Mixtures. — Either the 1-1-2 or the 1-1-3 formula, 

 or Rex lime-sulphur in dilutions down to one gallon in eight gallons of 

 water, have given good results. Lime-sulphur by the 1-1-4 formula is 

 a little weak for good results. 



Black Leaf. — This preparation used in the proportion of one gallon 

 in twenty-five, and one gallon in thirty-three of water gave good re- 

 sults, but one gallon in forty gallons of water was not very satisfactory, 

 many of the eggs hatching. 



Summer Spraying 



For the destruction of the lice upon the leaves spray very thoroughly 

 and forcefully from all directions with kerosene emulsion, 5 to 7 per cent 

 oil; Black Leaf, one part in seventy part of water, remembering that 

 thorough and forceful applications are necessary in order to get best re- 

 sults. [National Horticulturist.] 



