389 



should, because I have seen straight arsenate of lead buri» 

 under certain climatic conditions. 



A MEMBEE: Last jear I used lime as a aiarker; I 

 wanted to see how well I could make the trees look next the 

 road, so I doubled the lime and added four pounds of arse- 

 nate of lead to 50 gallons, and 5 quarts of lime-sulfur to 50 

 gallons, and it didn't make a particle of burning. I don't 

 know that that lime did it, but there was no burning and 

 the trees looked fine all summer. 



MR. H. W. ROSS: I would like to ask if the continual 

 application of a sulfur spray in one season wouldn't have a 

 tendency to smother the leaves by coating them over with 

 arsenate to such an extent that you might have them all 

 burned. It might be that the closing of the pores for so 

 long, and then this last application coming so late, would 

 look as if they were burned from the use of the application 

 of the arsenate of lead and lime-sulfur tombination. I know 

 my experience has been using the arsenate of lead as strong 

 as we did in the eastern part of the State, even for the sec- 

 ond application, it sometimes appeaired to smother the foli- 

 age rather than to burn it. 



PROF. FARLEY: I couldn't amswer that question. We 

 have noticed that the arsenate of lead burning took place 

 after several applications. We have noticed it on peaches, 

 and that is one reason why I recommended the use of the 

 self-boiled lime-sulfur in connection Avith the arsenate of 

 lead. We find that Ave can safely make one application of 

 arsenate of lead but that continued applications of arsenate 

 of lead alone, will cause more serious burning than if some 

 other material containing lime is combined with it. I do 

 j]Ot know about the closing up of the pores of the leaves, but. 

 I doubt if continued applications of arsenate of lead have 

 very much effect. In regard to the point Mr. Frost men- 

 tioned concerning the effect of climatic conditions on burn, 

 ing I Avish to say that we have had the same experience with- 

 the peach. We have applied concentrated lime-sulfur t» 

 peach foliage at a strength of 1 to 50, with no serious burn- 



