148 STATE POMOLOGICAI, SOCIETY. 



one nozzle per rod. If a grower has sufficient pressure, it would 

 be economy to employ two nozzles which may be attached to 

 the spray rod by means of a Y. 



I have eliminated some of the smaller details, but have cov- 

 ered some of the more essential points. If there are any ques- 

 tions I would be glad to consider them at this time. I might 

 add that the Baldwin seems to be the variety chiefly afifected 

 by the blister mite, so far as my observations go, although there 

 have been over 250 varieties recorded. 



Question : What is your formula for kerosene emulsion ? 



Mr. Siegler: One-half pound laundry soap, one gallon 

 water, two gallons kerosene. This gives a stock solution of 

 66% oil. 



Question: Then one in five of water? 



Mr. Siegler : Yes. 



Question: What is the comparative value of these insecti- 

 cides ? 



Mr. Siegler : Lime-sulphur would be the cheapest of the 

 insecticides if it could be purchased at a reasonable figure, fol- 

 lowed by the kerosene emulsion and then the miscible oils. 

 However, in Maine lime-sulphur costs considerable, — $8.50 to 

 $10 per 50 gallon barrel. If you figure up the cost of the ingre- 

 dients of lime-sulphur you can see what it is worth. Prof. 

 Stewart recommends a very good formula which is as follows : 

 Fifty pounds good stone lime containing 90% or over of cal- 

 cium oxide; 100 pounds sulphur; commercial ground or flour or 

 flowers of sulphur might be used, but the latter two are more 

 expensive; 50 gallons water. 



Question : Is the lime-sulphur as effective as the other insec- 

 ticides? 



Mr. Siegler : There are different points to be considered. 

 If the lime-sulphur is of benefit as a fungicide we have to take 

 that into account. Also lime-sulphur is a good scalecide. The 

 oils, however, spread more readily. With lime-sulphur, how- 

 ever, very satisfactory results may be obtained. 



Question : You have the oyster-shell bark louse the same as 

 we have? 



Mr. Siegler: Yes. 



Question : Will lime-sulphur cure that ? 



Mr. Siegler : Trees sprayed with lime-sulphur, one to eight, 



