176 



PLUM. 



may be carried on a man's shoulder, and by means of a hose 

 and nozzle throws a fine spray to the height of fom-teen or 

 fifteen feet. This form is particularly adapted for fruit-bush 



or orchard treatment where there is no room for the passage 

 of hand- or horse-machines. Of these there is all requisite 

 choice up to the large horse-machines adapted to spray, under 

 ordinary circumstances of wind, three thousand trees a day. 



In the foregoing pages I have endeavoured to put as shortly 

 as possible the main points of treatment by which attack of 

 caterpillars of the wingless moths may be greatly prevented ; 

 and also the sweeping remedial measures by which not only 

 these, but the caterpillars of all our common kinds of injurious 

 orchard moths, even when established on the leafage, may be 

 cleared by the use of sprayings of soft-soap wash of various 

 kinds of composition, and still more certainly by Paris-green. 



The use of this insecticide has now been so fully established 

 that it takes its place amongst our regular methods of treat- 

 ment without special consideration ; but those who wish to 

 study in detail much of scientific interest regarding the com- 

 position and method of application, also something of the 

 difdculties which had to be overcome in its first introduction, 

 will find the information in the following papers : — "Paris- 

 green as an Insecticide," ' First Annual Eeport on Injurious 

 and other Insects of the State of New York,' 1882, by Dr. J. 

 A. Lintner, State Entomologist, pp. 25-34: Albany, U.S.A. ; 

 " Notes on Paris-green," pp. 8-16, in ' Seventh Annual Eeport 

 of Noxious and other Insects of the State of Missouri,' 1875, 

 by Prof. C. V. Eiley, late Entomologist of Department of 

 Agriculture, U.S.A.; "Paris-green," 'Fourth Eeport of United 



