-68 THE CONNECTICUT POMOLOGICAL SOCIETY. 



laboratory and field tests demonstrated this. Its poor 

 sticking' qualities when used alone does not recommend its 

 use. The value of sediment in lime-sulphur appears to 

 depend very largely upon the magnesium oxide content. 



The above remarks apply only to the question of lime- 

 sulphur as a spray for apple scab. Of its uses on peaches, 

 pears and other fruits, we know, as 3^et, too little to make 

 definite statements. Scott's self-boiled lime-sulphur is at 

 present the standard summer spray for the peach. Mr. 

 Wallace's experiments with pear scab indicate that lime- 

 sulphur may be expected to control it. If there are any 

 questions on any of these points I shall be glad to answer 

 them if I can. 



President Rogers : I am sure we are all greatly inter- 

 ested in this subject. There is no more vital subject before 

 this convention. We have heard both Professor Whetzel and 

 Doctor Qinton, and I am sure we can get a great deal of help 

 from them. Professor Whetzel and Doctor Clinton also are 

 here to answer questions, and if whoever asks a question will 

 please give their name when they rise we will appreciate it 

 very much. 



Discussion. 



Mr. Frost: Has anything ever been done to burn up 

 the foliage on the ground to prevent scab? 



Prof. Whetzel: We have never carried on any definite 

 experiments ourselves in getting rid of the foliage on the 

 ground, but we have made some rather interesting observa- 

 tions. In 1909 in Medina we found one man who had plowed 

 his orchard late in the fall — I don't remember for what par- 

 ticular reason — but after the leaves had fallen he had plowed 

 his orchard, and in going over the orchard later that spring 

 we found this the only one in that locality that had a small 

 amount of foliage infection from scab. It had been reduced 

 to a marked extent as compared with orchards that had not 

 been so plowed. By plowing the leaves under he had gotten 

 rid of a large part of the infection. 



