Porators 1385 
Like the poor, the Colorado potato beetle is ever with us, and, 
although there is an occasional year when they do little injury, 
the following year is likely to see them abundant. If left wm 
molested, they will often, in forty-eight hours or less, so defoliate 
Fic. 420.—Sprayine PoTAToEs With A KNAPSACK 
SPRAYER 
the plants as to reduce the yield below the point of profit. This 
emphasizes the importance of putting the poison on in time. Often 
a very little, just as the old hard shells appear, before they deposit 
their eggs, will prevent further injury. The old stand-by has 
been, and in many places still is, paris green. This has many 
objectionable features. First, the arsenic is soluble and the foliage 
is burned by it. I am sure we have suffered more than we have 
realized from this. Professor Jones, late of the Vermont Ex 
