48 STATE POMOLOGICAL SOCIETY. 



mixture has not given as satisfactory control of scab as was 

 obtained with hme-sulphur solution. The percentage of con- 

 trol, however, is very gratifying, considering the fact that all 

 of the other dusting experiments thus far reported from Ex- 

 periirient Stations, with the possible exception of some work 

 done in New Jersey, have been entirely against the use of 

 dust. It seems quite possible that we may be able to refine 

 our method another year to such an extent that we may secure 

 as satisfactory results with the dry application as with the 

 lime-sulphur solution. It appeals to me that the biggest obsta- 

 cle, namely, the control of insect pests, has been overcome. T 

 am not in a position to recommend to any one that he abandon 

 the liquid spray. After we have accumulated data from anoth- 

 er year of experimentation I shall feel in a position to oiifer 

 more definite information on this subject. I believe, however, 

 that a man with a young orchard coming into bearing, who is 

 seriously contemplating the purchase of an additional spraying 

 outfit, might well wait another year with the idea that dusting 

 may be so far perfected that it will prove profitable for him 

 to purchase a dusting outfit instead of a spraying machine. 



Ques. How long would a lime-sulphur spray for scab be 

 efifective ? 



Ans. For a long time. Bordeaux mixture will be there 

 during the season, that is, on an area which is not increased 

 in size. 



Time is precious in spraying an orchard and the machinery 

 should be kept in proper condition. Filling the spray tank and 

 fixing the gasoline engine, mending poles and cleaning out noz- 

 zles are not spraying, and these are not things that ought to 

 be done during the spraying period. That time is precious and 

 the apparatus ought to be put in shape so no time will be lost. 



Ques. What is your standard pressure? 



Ans. We get lots of standards out in the orchards. They 

 run up to 200 pounds, and the big nozzles that we like best 

 and are in common use don't work satisfactorily at a pressure 

 under 150 pounds. Some people like to get out a row of noz- 

 zles. We never have been satisfied that we could do the best 

 work with more than two nozzles on a pole. 



Ques. Do you use the largest size disk? 



Ans. Yes, providing we have the pressure. 



