66 TRANSACTIONS OF THE ILLINOIS 



London Purple not only destroys the progeny of the codling moth, but 

 it seems to be a death dealing agent to all insects that prey upon the fruit 

 and foliage of the apple tree. In one portion of my orchard last spring, the 

 measuring worms were getting quite numerous, and were rapidly stripping 

 the trees of their leaves. We gave them a dose of London Purple, and two 

 days afterward a live worm could hardly be found in that part of the orch- 

 ard ; but there were plenty of dead ones swinging by their webs from the 

 leaves that were left on the trees So taking it all in all I think that we 

 have in London Purple, rightly applied, a safe and efficient remedy against 

 most of the fruit and leaf eating insect enemies of the orchardist. 



Respectfully submitted, 



J. R. DOUGLASS. 



Mr. Vaughan — I have had some experience with poisons in the 

 orchard and prefer arsenic, as a solution can be made by boiling, that 

 will not readily precipitate. It is generally used too strong. One 

 pound to four hundred gallons of water, I think, is strong enough. 



Dr. Hall — Mr. Dixon, of Iowa, first experimented with arseni- 

 cal poisons. He used one pound to one hundred and fifty gallons of 

 water, but I find that half that strength will often scorch the leaves. 

 I like the Nixon pump and nozzle better than any other I have seen 

 in operation. 



Mr. Coe — The agent of the Nixoii pump came to Quincy and 

 tried to sell this pump for §35.00. This is much too high. I there- 

 fore procured a cheap pump and went to work with a solution of one 

 pound of London Purple to one hundred and twenty gallons of 

 water. Where I sprayed I had nice, smooth fruit. 



Mr. Mortimer — This is a question every horticulturist is inter- 

 ested in, and much good will result from the discussion. There is, 

 of course, some danger connected with the operation. Stock should 

 not be allowed in the orchard until a rain has washed the poison 

 from the grass. 



Mr. ij. R. Bryant — I take a large cask and rig a Field Force 

 Pump on it, put in the water and poison at the house, and before I 

 get to the orchard it is thoroughly mixed. 



Mr. C. N. Dennis — I used a Field Force Pump and one pound 

 of London Purple to one hundred and fifty gallons of water, and did 

 not notice any injury to the leaves. We threw away the spraying 

 nozzle and made a coarse spray by using the thumb. 



