294 CONNECTICUT EXPERIMENT STATION REPORT, I967-I908. 



In the above cultivation experiments and in those with carbon 

 disulphide duplicate tests were made with small cages containing 

 three square feet. These tests gave similar results to those of 

 the large cages. 



Spraying with Poisons. 



At the beginning of the season we were in doubt as to whether 

 the peach foliage could be sprayed with any poison. Dr. J. B. 

 Smith, State Entomologist of New Jersey, informed us that he 

 had used arsenate of lead on peach foliage without apparent 

 injury. A statement was made by Prof. A. L. Quaintance of the 

 Bureau of Entonjology that in some experiments with arsenical 

 poisons on peach foliage, all materials used injured either the 

 foliage or the fruit.* As soon as the leaves were out suflSciently 

 to make a test, fourteen small peach trees on the station grovmds 

 were thoroughly sprayed with arsenate of lead at the rate of 

 one ounce in one gallon of water, which is about equal to three 

 pounds in fifty gallons. No injury followed. This test was 

 repeated with another brand of arsenate of lead with the same 

 results. 



The following materials were applied in Barnes Brothers' 

 orchard to note the effect on the trees and insects: 



Vreeland's arsenate of lead 3 lbs. in 50 gal. water 5 trees 



" " " " iH Ibi in so gal. water 5 trees 



Paris green yi lb., 3 lbs. lime in 50 gaL water 10 trees 



Hellebore, 3 lbs. in 50 gal. water 6 trees 



These trees were sprayed on the forenoon of July 6th, and 

 the application was followed by a Hght shower that evening. 

 A visit was made to the orchard July 9th, and it was found that 

 through a mistake these trees had all been resprayed that morn- 

 ing with arsenate of lead, which was being used on the remainder 

 of the orchard. These trees were examined several times, and 

 no injury was noted even where the Paris green was applied. 



Extensive Spraying Operation by the Owners. 



Probably the most extensive spraying operation ever under- 

 taken in the Eastern States in a peach orchard when in foliage 

 was carried out by the Barnes Brothers during this last season. 

 Several hundred pounds of arsenate of lead was applied to 



* Bureau of Entomology Bull. No. 67, p. 47, 1907. 



