EXPERIMENT STATION REPORT. 603 



level ; i, e., the trees, all of which had had at least one application 

 of *'Con. Sol." of winter strength, were auite as badly infested as 

 they were in spring and would, left to themselves, have become 

 very much worse. 



I cannot, as a result of these applications, lookwith confidence 

 for good results from winter work with this combination. 



RECORD OF THE EXPERIMENT ORCHARD. 

 General Notes. 



The work in the orchard during the past s.eason was chiefly to 

 test the various insecticides that w^ere either recommendecl or 

 advised ; both on the insects against which they were applied, and 

 on the trees. All the applications were made with a Leggett com- 

 pressed air pump through a Vermorel nozzle except where other- 

 wise stated. 



Work began March 9th, on a clear, bright, sunny day, temper- 

 ature 36° at 8.15 A. M. Material used, caustic soda, 97^-98°, at 

 the rate of 154 pounds in 2 gallons of water. Two lilac bushes 

 w^ere first sprayed; one of them very badly, one moderately 

 infested. Aside from these, trees 4, 6, 22, 23, 26, ;^^, 34, 39 and 

 41 were sprayed. Details will be found under the tree numbers 

 where also the effects of the application are noted. Next day all 

 the sprayed trees were blue, some quite decidely so, some with 

 only a bluish tinge but the universal and even occurrence of the 

 shade testified to the thoroughness of the application. 



March loth. applied the "Universal Insecticide and Scale 

 Killer", which is a chemical combination of lime and sulphur with 

 some other materials added to enhance effects. The day was 

 bright, clear and cold. There were ten gallons of the "killer" 

 and to these one gallon of hot water was added. Trees sprayed 

 were i, 2, 7, 8, 9, 16, 17, 22, 30, 31, 38, 44 and 46. A bluish 

 white deposit formed on the bark when the material was dry. 



Beginning March nth, came a stormy period; first rain, then 

 with a drop of the temperature a coating of ice on the trees ; a 

 day of sunshine ; a hea\'y snow ; a thaw ; a freeze and all that other 

 variety of weather characteristic of the second half of March. 



April 5th was a clear, warm spring day and in the afternoon 

 sprayed trees 15, 16, 18, 19, 21 and 23 svith "Sahmene", i pound 

 to I gallon of water. 



April 15th sprayed tree No. 46 from one side very thoroughly 

 with a concentrated lime, sulphur and salt mixture, the "Con- 

 Sol" of the American Horticulture Distributing Co. The sample 

 was diluted with 40 parts of water as per direction and the appli- 



