STATE POMOLOGICAL SOCIETY. 165 



Tree No. 10 was sprayed on June 11th with a kerosene emulsion 

 consisting of four pounds common 3'ellovv hard soap, one gallon ker- 

 osene oil, and one gallon soft water, the soap being dissolved in the 

 water, the solution heated to boiling, the kerosene added, and the 

 whole stirred until cold. One pint of the mixture was diluted with 

 twent}' gallons soft water, and applied to the trees in the same man- 

 ner as the Paris green and water. The foliage seemed to be injured 

 considerably by the application, a portion of the leaves turning 

 brown in a few days, as if scorched. 



This tree yielded 208 fruits that were not wormy, and 162 wormy 

 ones, or 44 per cent of wormy fruits. 



It appears that the percentage of wormy fruits from the trees 

 sprayed with Paris green and water was about 22 per cent less than 

 from those not sprayed. In other words, at this rate 100 barrels of 

 apples picked from the sprayed trees would have yielded 22 barrels 

 more fruit free from worms than the same number from the un- 

 sprayed trees. The kerosene emulsion in this case did not seem to 

 prove beneficial. 



THE APPLE SCAB. 



[From Proceedings of the New Jersey State Horticultural Society, 1886.] 



What is the experience of the Society in respect to what is gen- 

 erally known as apple scab ? 



The President would like to hear from Prof. Scribner. 



Prof. Scribner. The Department of Agriculture is engaged in 

 preparing a special investigation of this disease of the apple, and I 

 should be very glad to learn from practical fruit growers their ex- 

 perience in regard to it, and what varieties are most subject to it ; 

 under what conditions is it most prevalent ; whether an}^ one has no- 

 ticed its absence under any peculiar circumstances, and what are the 

 probable losses resulting from it. 



The fungus in its active form, as it attacks the apple, is well known. 

 It attacks the apple, the leaves and young shoots, and has been re- 

 peatedl}' propagated from one orchard to another on the grafts. It 

 is probably perennial in its habit, living from one year to another in 

 its vegetative state ; what other forms it may have besides those 

 familiar to us all we don't know. It does not penetrate deeply in the 

 tissues, but is a surface disease, and is readih' susceptible to fungi- 

 cides. 



