Biting Insects 



m 



y 



Fig. 49. — The "Stott" spray nozzle. 



leaf beetle and gipsy-moth, the smaller for brown-tailed 

 moth, tussock-moth, and fall web-worm. 



Paris Green mixture: 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 off 

 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 quicklv, but 



is also more dangerous to the 

 foHage than is the Arsenate 

 of Lead, although the addi- 

 tion of milk of lime reduces 

 the injurious eft"ects. Yet it 

 Fig. 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. 



