POTATO SPRAYING AND DUSTING. 



Table VI. 

 Intensity of Flea- Beetle Injury. 



17 



Nature of 

 Application. 



Date. 



Locality. 



No. of 

 shoots. 



Average no. 

 of leaves 

 per shoot. 



Average no. of 

 fenestrations, 

 per leaf. 



Untreated 



June 10 



Elmer 



20 



15 



154-5 



Bordeaux-Lead Arsenate 



>> 



»5 



' 20 



15 



92 



Kil-Tone 



>» 



5J 



20 



15 



142 



Lead Arsenate . . 



5 J 



J» 



20 



15 



138-6 



Sulphur-Lead Arsenate . . 



>> 



>> 



20 



15 



208-4 



Bordeaux-Lead Arsenate 



June 29 



Robbins- 

 ville 



20 



14 



9-3 



Vreeland's Electro 

 Bordo-Lead 



>j 



j» 



20 



15 



9-7 



Gypsum -Zinc Arsenite . . 



>> 



>> 



\ 23 



14 



8-3 



Sulphur- Zinc Arsenite . . 



»» 



>> 



15 



13 



11 



Untreated 



July 1 



Freeh jld 



23 



13 



7-7 



Untreated 



July 9 



>> 



24 



13 



9 



Bordeaux -Lead Arsenate 



»> 



>> 



26 



9 



4-9 



Ansbacher's Bordeaux- 

 Lead 



July 10 



»> 



29 



9 



7-15 



Lead Arsenate . . 



j> 



>» 



29 



9 



6-3 



Sulphur-Gypsum -Lead 

 Arsenate 



>» 



j> 



23 



9 



7-7 



Bordeaux -Lead Arsenate 



July 13 



Robbins- 

 ville 



33 



11 



8-9 



Vreeland's Electro 

 Bordo-Lead 



>> 



»> 



30 



8 



21-5 



Gypsum-Zinc Arsenite . . 



>5 



1 



22 



8 



13-54 



Sulphur-Zinc Arsenite . . 



J> 



>> 



21 



9 



13 



Bordeaux-Lead Arsenate 



July 16 



Elmer 



27 



13 



15 



Kil-Tone 



J > 



' 



28 



14 



28 



Lead Arsenate . . 



>> 



>y \ 



25 



15 



21 



Sulphur -Lead Arsenate . . 



>» 



»> 



29 



14 



28 



Untreated (late crop) . . 



Aug. 22 



»» 



23 



9 



32 



(C155) 



