POTA 



TOES 



L385 



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 un- 

 molested, they will often, in forty-eight hours or less, so defoliate 



Fig. 420. — Spraying 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. T am sure we have suffered more than we have 

 realized from this. Professor Jones, late of the Vermont Ex- 



