EXPERIMENT STATION REPORT. 605 



July 5th, tried the "Horticultural Compound", a soap material 

 and applied at the rate of 2 ounces in i gallon of water to the 

 entire grape row to test its effect on leaf hoppers. Thereafter 

 trees 18, 19 and 21 were sprayed, using 5 gallons on the three 

 trees — a perfect drench. The general effect seemed, to be good 

 and, on the 8th, sprayed trees i, 2, 7, 8, 15, 20, 23, 24, 26, 30 and 

 31 with the same material at the same strength. 



July 13th, sprayed trees 16, 29, 34 and 47 with Rose-leaf 

 tobacco extract, i pound in 5 gallons of water. 



August 19th. sprayed trees i, 2, 7, 18, 24, 30 and 38 with the 

 Horticultural Compound at the strength of 2 ounces in i gallon 

 of water. A heavy rain began that evening and continued 

 through the night so, on the 29th, another spraying seemed indi- 

 cated and trees i, 2, 7, 18, 19, 21, 23, 24, 26, 30 and 38 were 

 again treated with the same mixture. 



September i6th, trees 18, 19 and 21 were sprayed with equal 

 parts of soluble petroleum and water, tree 18 not so thoroughly as 

 the others and next day most of the scales seemed to have been 

 cleaned out. This application was made with one of the large 

 atomizers sold for garden use. 



September 26th, sprayed trees 24 and 26 with i part soluble 

 crude petroleum to 4 parts of water, with an atomizer. 



October 14th. trees 1,8, 17, 30. 32, 33, 38, 39, 42 and 47 were 

 sprayed with Kill-O-Scale at the rate of i part to 20 of water. 

 October 19th. sprayed trees 7, 23, 34 and 44, with the same mix- 

 ture. 



It will be noted that four winter and six summer mixtures were 

 used and from the fact that the same trees were sprayed again and 

 again it will be concluded that none of them were especially 

 effective — and that conclusion would accord with the facts. 

 Nevertheless, there was quite a difference in results and, in any 

 case, no trees were killed by scale. 



The severe winter affected the trees badly, and the peacli trees 

 especially, which went into the winter with a heavy setting of 

 fruit buds came out poorly. There were not r. dozen blossoms 

 all told and not half a dozen fruits. Incidentally it may be said 

 that some of the lilacs were injured and that my privet hedge 

 w^as killed nearly to the ground. 



The specific record is as follows : 



Tree i — Mariana Plum. March lotli, sprayed with the "Uni- 

 versal Insecticide and Scale Killer" and applied a drenching dose 

 from all sides so as to reach all save extreme tips. 



Leaf buds began to start April 17, blossom buds began to ap- 



