56 



THE COTTONY MAPLE SCALE. 



spray consisting" of one 

 pound of whale-oil soap 

 dissolved in four gallons 

 of water, applied severa' 

 times, will be beneficial, 

 When trees are dormant, 

 or any time after the 

 leaves have fallen, use 20 

 per cent kerosene emul- 

 sion (one part stock solu- 

 tion to four of water). 

 This strength must not be 

 used when the trees are in 

 foliage. A 5 per cent so- 

 hition, however, can be 

 used with safety, wdien 

 trees are in leaf and if ap- 

 plied when the scales are 



first hatched, is fatal to 

 them. One pound of 

 wdiale oil soap in one gal- 

 lon of water is also good 

 when the trees are dor- 

 mant. 



Directions for making kerosene emulsion: 



TTubbard Formula — 



Hard soap, or soft soap, one pound. 

 Kerosene, 2 gals., 

 Water, i gal, 



Dissolve the soap in boiling water; remove from the stove 

 and add the kerosene while the water is still boiling hot; 

 churn with a spray pump until it gets to be a soft butter-like 

 mass. 



Judicious pruning in fall, winter or early spring, before 

 the ee"e"s hatch, or at the time when the cottonv secretion first 

 becomes conspicious is helpful. 



Fig. 47. — "Lady Bird" larval skins (contain- 

 ing pupae) on bark of tree infested witli 

 Maple scale. (Author's illustration.) 



