68 



STATE HORTICULTURAL SOCIETY. 



DUSTING BALDWINS— 1921 



I do not consider that these figures show an accurate comparison of 

 the various materials of scab control l)ecause of the uneven crop. In 

 several plots much of the fruit was set from late ])lossonis. The point 

 to which I wish to call particular attention is the uniform amount of 

 early scab on all plots, except those with very light crops. The Mcin- 

 tosh trees all had two pre-pink applications of dust but it did not seem 

 to hold the early infections. 



All sprajdng combinations controlled coddling moth pretty uniformly 

 but there were more w'ormy apples on the dusted trees than on the 

 sprayed. 



I am giving these figures for what they are worth and not as conclu- 

 sive evidence one way oi- the other as much more work will have to be 

 done in order to know just where we stand in regard to cheaper dust or 

 the use of spreaders in spraying materials. In regard to spreaders I 

 may add that there seem to be pretty good arguments both ways and 

 I am studying the problem without any prejudices either way. There 

 are several points which must be considered, some of which are: 



(1) Cost 



(2) Ease of preparation 



(3) Compatibility 



(4) Efficiency 



GENERAL COMPARATIVE TESTS OF DUSTS ON APPLES AND PEARS. 



Comparative tests of dusts and sprays on apples and pears were not 

 made on a very large scale this year but there* were two or three of interest. 

 One was at Traverse City on the Stickney farm. The orchard is a young 

 one and is made up of several varieties. There was no spraying done, 

 the orchard being dusted except for the check trees. Seven applica- 



