26 ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



At the present time it is difHcult to find egg' masses or, except for 

 the marked trees and the cutting of brush, any other indications that 

 the area is infested by the gipsy moth. But the work must be kept 

 up even after it is believed that the hist one has been destroyed. 



In reply to a question Mr. Britton stated that the chances for 

 exterminating this insect in Connecticut appeared to be good, that the 

 people were interested in the matter, and an urgent appeal would be 

 made to the State legislature for funds to use in suppressing the moth. 



A paper was read, entitled : 



NOTES ON FUMIGATION AND DIPPING OF NURSERY TREES. 



Bj' T. B. Symons and A. B. Gahan, Vollri/c Park. M<l. 

 [WitlKlrawu for iinblication (elsewhere. J 



Considerable interest was drawn to this paper, owing to the fact 

 that the State of Oregon has recently required that nursery trees be 

 dipped in the lime and sulphur wash rather than fumigated before 

 they are planted. 



Mr. Slingerland called attention to the fact that a temperature of 

 180° F. used in one series of the dipping experiments, was unneces- 

 sarily high, and this probably accounted for the serious injury to the 

 trees. 



Mr. J. L. l*liillips stated that he had dipped one-year apple trees in 

 cold lime-sulphur wash in the spring of 1906, as follows: 235 Black 

 Twig, 205 York Imperial, and 20 Albemarle Pippin. The trees were 

 dug, the tops cut off to within 3 feet of the crowns, and the tops 

 dipj)ed to the crowns in the wash, made by using 15 pounds of lime, 15 

 pounds of sulphur, and 5 pounds of salt to 50 gallons of water. The 

 trees were immediately set in the orchard and all lived and grew 

 well except one. The results with peach trees were not so good. They 

 were cut back to within 2 feet of the crown and dipped as follow^s: 

 151 Smock, of which 124 lived ; 142 Elberta, of which 76 lived ; and 

 80 Salway, of which 66 lived. Many of the peach trees that lived 

 died back a few inches from the top. As this was a commercial plan- 

 tation, no checks were planted. There was considerable injury to 

 both peach and apple trees in the experimental dip]nng tests, but the 

 conditions under which the trees were handled may be partly at fault, 

 as a number of untreated trees planted at the same time died also. 



In reply to several questions, Mr. Symons stated that the lowest 

 temperature used in the dipping experiments was such that a person 

 could bear his hand in the solution. He could not say definitely 

 whether all the trees were dug in the spring, but believed this was the 

 case. No observations could be made as to wliether this Ireatmeut 

 killed the scale, as nearly all tlu> treated trees died dui'iug the sunuuer. 



