Summer Meetiriz. 93 



'i5 



much, but I believe that by studying the facts presented a little and 

 following out the suggestions made as to spraying, apple-growers 

 may find less bitter rot and more good apples this season than in years 

 past. 



We will say in this connection that at the conclusion of the read- 

 ing of Prof, von Schrenk's paper, Professor Stedman was asked if 

 an arsenite could not l?e added to these later sprays and catch the later 

 broods of the codling moth, and he replied that as many could be 

 Ivilled then as earlier in the season. The later ones are really the ones 

 which do the greatest damage, for they are the ones which appear 

 in the fruit at picking time. The only reason it has not been recom- 

 mended to spra}' late for them is that the cost would be too great. 

 But if the grower is going, to spray for the bitter rot anywa}^, as they 

 ^vill have to do in Southern ^lissouri and Illinois, then he can add 

 the poison at very slight expense, and render his fruit more free from 

 insects. He hoped many who spray for bitter rot would do this as an 

 experiment. 



Question: Are some apples immune? 



Prof. Von Schrenk. — Yes, sir; 1 am sorry that I forgot to bring 

 some photographs of this nature with me. We tried an experiment with 

 some apples that were perfectly sound. We took Ben Davis ripe, per- 

 fectly sound, and we sterilized those apples until there was nothing on 

 them. Painted them over with bitter rot. We put them away for two 

 Aveeks and they were perfectly sound. When an insect hurts the apple 

 in any way, the bitter rot has that much more work to do. But there 

 .are some varieties that take the bitter rot easier than others. It may 

 be that there will be some kinds of fruit that we will have to give up. 

 But dont give up raising apples on account of bitter rot. Spray for it. 

 Spray several times ; at any rate I would not feel discouraged. 



Secretary Goodman. — How do you put in this blue vitriol and 

 lime? Do you put the two together? 



Prof. Von Schrenk. — The manner in which I would do this would 

 1)6 to build a platform on posts. Have two divisions or steps to it. One 

 a little higher than the other. I would have two vessels, one filled with 

 the mixture of copper sulphate and the other with the other mixture. I 

 would have two pipes and have a vat on this lower part large enough 

 for the contents of the two vessels. Such a thing as this can be fixed 

 up anywhere. Not much trouble. The only thing is to get the water to 

 the top platform. Now. if I was building one I would have this kind 

 of a platform : I would have two cases placed on the lowest. Lime in 

 one and copper in the other. Then I would have two pipes to these and 

 liave it so that they could both be open at once and run the two out to- 



