ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 



135 



The demonstration plat (XIII) received in all three treatments of a 

 combined Bordeaux mixture and arsenate of lead spray. Plat XV 

 (one-spray method) received only one arsenate of lead treatment just 

 after the falling of the petals, but two additional applications of 

 Bordeaux mixture were given to protect the fruit and foliage from 

 fungous diseases. Plat XVII was left unsprayed throughout. The 

 Ben Davis variety of apple was used entirely in the experiments. 



/ / / / / 



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 D DO D D D D D 



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 D D D D D D ODD D D D £> D D 



SSSSSSSSSSSSSSSSSSSS 

 SSSSSSSSSSSSSSS 5 S S S S 



s$ss$s$ssss sssssssss 



s s s s s s s s s s s s\ 

 ssssssssssss 



S S S S S S s s s s s s 



ssssssssssssssssssssssss 



SSSSSSSSSSS SSSSSSSSS S S S s 

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s s s s 



s s s s 

 s s s s 



Fig. 36.— Diagram showing arrangement of plats and trees in the orchard of the Strathmore Orchard Co., 

 near Mount Jackson, Va. Trees marked £ sprayed by the owner; trees marked L used for experiments 

 with lime-sulphur wash. Circles indicate count trees, the numbers agreeing with those in the tables. 



THE CODLING MOTH. 



The results of the respective treatments in the control of the codling 

 moth are shown in Table XV. 



Table XV. — Number of sound and wormy apples for each tree from one-spray, demon- 

 stration, and unsprayed plats. Mount Jackson, Va., 1909. 



PLAT XIII. DEMONSTRATION. 



Condition of fruit. 



Tree 

 1. 



Tree 

 2. 



Tree 

 3. 



Tree 

 4. 



Tree 

 5. 



Tree 

 6. 



Tree 



7. 



Tree 



8. 



Total 



for 

 plats. 



Total 

 per cent 

 sound. 





200 

 1,666 



136 

 1,172 



155 

 3,311 



83 

 625 



173 

 1,494 



168 

 3,618 



119 

 944 



150 



2,278 



1,184 

 15,108 













Total 



1,866 

 89.29 



1,308 

 89.61 



3,466 

 95.53 



708 



88.28 



1,667 

 89.69 



3,786 

 95.57 



1,063 



88.81 



2,428 

 93.83 



16,292 





Per cent sound 



92.74 









PLAT XV. ONE SPRAY. 













Wormy 



250 



3,577 



253 



3,404 



86 

 589 



186 

 730 



250 

 1,429 



219 

 3,261 



122 



847 



257 

 4,042 



1,623 



17,879 





Sound 









Total 



3,827 

 93.49 



3,657 

 93.09 



675 

 87.26 



916 

 79.70 



1,679 

 85.12 



3,480 

 93.71 



969 

 87.41 



4,299 

 94.03 



19,502 





Per cent sound 



91.68 











PLAT XVII. UNSPRAYED. 



Wormy 1, 913 



Sound 12,013 



Total 3,926 



Per cent sound 51. 23 



I 



1,425 

 1,684 



865 

 965 



983 



524 



1,538 

 1,651 



1,792 

 2,361 



2,027 

 3,094 



1,247 

 1,548 



11,790 

 13,840 



3,109 

 54.17 



1,830 

 52.19 



1,507 

 34.78 



3,189 

 51.78 



4,153 

 56.86 



5,121 

 60.42 



2,795 

 55.42 



25,630 



54.00 



30490°— Bull. 80—12- 



-10 



