AGRICULTURAL EXPERIMENT STATION. 



105 



sprayed with Paris green, also that the percentage of wormy fruits 

 among the windfalls is smaller from the sprayed trees. 



3. Negative Results. Incidental to some other experiments, a 

 few trees in an orchard belonging to F. M. Woodward, of Win- 

 throp, were sprayed with Paris green. The work was conducted 

 by Mr. C. E. Moore. 



When spraying for the apple scab, certain trees were sprayed 

 once with a mixture of Paris green and carbonate of copper in 

 suspension. The poison was used in the proportion of 1 pound 

 to 160 gallons of water. The trees were old, and were surrounded 

 by unsprayed trees. 



About three bushels of fruit were counted from each of four 

 trees, care being taken to obtain fruit from all parts of the tree. 



The results were as follows : 



Perfect. 



387 

 218 



Sprayed. 

 Wormy. 

 93 



Per cent. 



wormy. 



19.3 



28.2 



Perfect. 



480 

 394 



Per cent. 



wormy. 



13.5 



28.5 



Not Sprayed. 



Wormy. 



75 

 159 



The results are indifferent or negative. The conditions were 

 such, however, that little reliance is placed on this test. 



4. Point of Attack. The objection has been raised by some 

 of our fruit growers that a large proportion of the affected fruit 

 is entered from side or base, and consequently that spraying 

 before the fruit turns down has no special merit. Special atten- 

 tion was accordingly directed to this point. The variety under 

 consideration was Rhode Island Greening. 





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1 



57 



24 



33 



1:1.37 



Sprayed twice, — 1 lb. to 250 gallons. 



2 



39 



14 



25 



1:1.78 



a U 'it it it 



3 



96 



32 



64 



1:2.00 



Sprayed twice, — 1 lb. to 300 gallons. 



4 



154 



63 



91 



1:1.44 



U It, ' it it It 



5 



238 



141 



97 



1:0.69 



Not sprayed. 



6 



211 



111 



100 



1:0.91 



<.. .<. 



It will be observed that while the absolute number of wormy 

 fruits is greatly in excess, in case of the unsprayed trees, the 

 relative number of entrances at the calyx is more than doubled. 

 The most plausible explanation for this condition would seem to 



