July, 1914.] 



THE APPLE MAGGOT. 



101 



22. Check to the above. Variety, Grimes Golden. Loca- 

 tion, Chart 7. Tree 22. Prior history and present fruiting the 

 same as the preceding. No sprays applied. About 13^ bushels 

 of apples were removed and recorded. Total apples examined, 

 490; total punctures, 221; proportion free from punctures, 68.9 

 per cent. 



5 



« 



6 



7 



8 





12 



/3 



14 



15 



/6 



I? 



'8 



13 



20 





22 



23 



24 



25 



Chart 7. Location of trees in poison bait spraying. Trees 23, 24, 25, 

 sprayed Grimes Golden, experiments 19, 20, 21. Tree 22, check Grimes 

 Golden, experiment 22. Scale 1 inch = 60 feet. 



1. Baldwin. 



2. Gilliflower. 



3. Baldwin. 



4. August Sweet. 



5. GilUflower. 



6. Greening. 



7. Baldwin. 



8. Baldwin. 



9. Pippin. 



10. Greening. 



11. Porter. 



12. Baldwin. 



13. Tolman Sweet. 



14. Baldwin. 



15. Baldwin. 



16. Baldwin. 



17. Baldwin. 



18. Gravenstein. 



19. Snow. 



20. Snow. 



21. Snow. 



22. Grimes Golden. 



23. Grimes Golden. 



24. Grimes Golden. 



25. Grimes Golden. 



Discussion. In experiments by Illingworth (34, p. 167) favor- 

 able results were considered to follow certain trials of poison 

 sprays. The writer must admit to a belief that the tests described 

 may not have been extensive enough or sufficiently safeguarded 

 in the matter of attendant circumstances, as suggested earlier in 

 this bulletin. 



