ENEMIES, AXD HOW TO FIGHT THEM. 



91 



It is not enough to know the formulas of washes to be ap- 

 plied to the trees, but also at what time the application should 

 be made to be effective. 



Let us take the long or mussel scale insect at first : the first 

 brood hatches from the middle of April to the first week in May ; 

 the second, from the last of July to the middle of August ; and the 

 third and last, from the last of September to the middle of October. 



The white scale has also three broods : the first, in April 

 and May ; the second, from the middle of July to the 1st of 

 August ; and the third, from the last of August to the second 

 week in September. 



He who waits until this protecting shield has been reached 

 may as well spare his labor, for his most powerful washes will 

 fail to penetrate it, or to disturb the insect. Applied at the right 

 time, however, as given above, just after the eggs are hatched 

 and the fly has left the scale-house, it is easily exterminated. 



When trees are very badly infested, it is wtII to cut off and 

 immediately burn the smaller limbs ; then, with a fountain spray 

 pump, drench the tree thoroughly with one of the preparations 

 given below. 



Dissolve the soap in a little boiling water, place it in a tight 

 barrel, break up the soda in small pieces, add it, fill up barrel 

 with soft water, and stir the mixture till well mixed. Keeps 

 good indefinitely. Apply to trunk and large branches with a 

 brush, rubbing in well ; drench top and leaves with a rose 

 syringe. Apply twice a year, spring and fall ; oftener if the 

 grove is seriously infested. 



FOR SCALE INSECTS. 



No. 1. 



Sal Soda, 



10 pounds. 

 . 5 " 

 .40 gallons. 



Hard Soap, 

 Water 



Xo. 2. 



Tobacco Stems 

 Copperas 



Water. 



, 5 pounds. 

 5 " 

 40 gallons. 



