64 THE CONNECTICUT POMOLOGICAL SOCIETY. 



Station in connection with this plant disease work. I 

 might say we have undertaken the investigation of plant 

 diseases on a plan slightly different from what has been 

 ordinarily followed in the past, and that is, instead of 

 trying to work at arm's length, or approximately at half 

 a dozen arms' lengths, we have taken our laboratory ecpiip- 

 ment and the man who is to do the investigation to the 

 orchard, or the particular locality where the problem lies. 

 We have not tried to bring the orchard to the laboratory. 

 We established a temporary laboratory at Sodus for the 

 lime-sulphur work ; another in the grape districts when we 

 studied grape diseases, etc, eight in all. The results of the 

 investigation with lime-sulphur have been obtained, not by 

 myself at all, but by one of the men working in the depart- 

 ment, Mr. Wallace. Practically all the results which I will 

 show you to-day are the results of his investigation cover- 

 ing two years. It seems rather remarkable to me that a 

 man in so short a time should have gotten together such 

 a large number of interesting facts which are of such great 

 interest to the fruit grower. 



(From this point on the room was darkened and the 

 speaker showed many lantern slides illustrating his re- 

 marks as follows.) 



I shall now show you a few pictues to help emphasize 

 some of the points I desire to make in regard to this ques- 

 tion of the summer use of lime-sulphur. 



Apple Scab. I shall first point out some of the well- 

 established facts about the scab, that most common fungus 

 pest of the apple. This is a fungus disease caused by a 

 parasitic plant that lives on the apple. This fungus winters 

 only on the old leaves on the ground. During the growing 

 season the fungus lives on the surface of the leaf or 

 fruit just under the thin protective skin or cuticle. When 

 the leaves fall to the ground, the root-like mycelium of the 

 fungus grows all through the leaf, and by the next spring 

 has formed hollow pimple-like bodies in the leaf, often 



