Biting Insects 137 
leaf beetle and gipsy-moth, the smaller for brown-tailed 
moth, tussock-moth, and fall web-worm. 
Paris Green mixiure: One pound of Paris Green, eighteen 
to twenty cents, made into a paste with warm water and 
stirred into one hundred to 
three hundred gallons of 
water or Bordeaux mix- 
ture, is a safe mixture, the 
stronger solution being for 
the elm-beetle. If water is 
used, the addition of one pound of milk of lime is recom- 
mended to prevent injury to foliage. Fill a barrel nearly 
full of air-slacked lime, fill entirely with water and let it 
stand until settled; the clear water above the lime is the 
milk of lime; or, two pounds of fresh lime to one pound of 
Paris Green, slacked in the usual manner, then strained 
through cheese cloth and diluted to fill a pail, may be 
substituted. 
Paris Green (or better, if attainable, Scheele’s Green, 
because cheaper and more effective) acts more quickly, but 
is also more dangerous to the 
foliage than is the Arsenate 
of Lead, although the addi- 
tion of milk of lime reduces 
the injurious effects. Yet it 
Fic. 50 — ‘‘ Bordeaux” spray nozzle requires more nicety in prep- 
aration and use, and is also more easily washed off. But, 
if the Arsenate of Lead is not readily attainable, Paris 
Green (if unadulterated) is a sufficiently satisfactory all-round 
insecticide. 
Since it has been shown that insects will avoid poisoned 
food until driven to it by hunger, it is essential to extend the 
spraying to all parts and to all food plants. 
Fic. 49.-—~ The “Stott” spray nozzle. 
a SS 
