54 MAINE AGRicuivTURAL s;xpe;riment station. 191 1, 



as a fungicide may be advantageously substituted in the orchard 

 for bordeaux. The question of paramount importance is the 

 determination of its relation and action in conjunction with a 

 reliable insecticide. From the standpoint of general economy 

 for the grower the only solution of the spraying problem will 

 be a safe and effective insecticide-fungicide combination. 



An orchard of 128 Ben Davis trees from 20 to 25 years old, 

 of fairly uniform size and condition, and promising a moderate 

 yield per tree, was divided into 12 plots. Plot i contained 9 

 trees. The remainder consisted of 12 each, excepting Plot 9 

 which contained 11.* The following table gives data of treat- 

 ment. 



Table 11. 



Plot. Treatment. 



Manufactured 

 by 



Average 

 Density 

 Degrees 

 Beaum^. 



Amount used 



in 50 gals. 



water. 



Amount lead arsenate 

 in 50 gals, water. 





First 



Applica-. 



tion. 



Second and 

 third Appli- 

 cations. 



1 Unsprayed . . . 



2 Lime-sulphur 



3 Lime-sulphur 



4 Lime-sulphur 



5 Lime-sulphur 



6 Lime-sulphur 



7 "Sulfocide" .. 



8 Intensified 



Self Boiled 

 Lim e-s u 1 p- 

 hur 



9 Boiled Lime- 



sulphur 



10 Bordeaux 



mixture 



11 Bordeaux 



mixture 



12 Unsprayed . . . 



- 



Niagara Sprayer 

 Company 



Bowker Insecti- 

 cide Co 



Sterling Chemi- 

 cal Co 



34 

 34 



31 



33 



32 

 40 



31 





2 lbs 



2 lbs 



2 lbs 



2 lbs 



2 lbs 



2 lbs 



2*lbs 



2 lbs 



2 lbs 



2 lbs 



3 lbs 



11 gals 



3 lbs 



^ gals 



IJ gals 



3 lbs 



Grasselli Chemi- 



3 lbs. 



Jas.A.Blanchard 

 Company 



B. G. Pratt Co... 



Home made 



Home made 



Home made 



Home made 



14 gals 



Jgal* 



10 lbs. lime 



10. lbs. sulphur 



24 lbs. lime ) *^ 

 5 lbs. sulphur \ 



4 lbs. copper sulp- 

 hate. 4 lbs. lime 



3 lbs. copper sulp- 

 hate. 3 lbs. lime 



1 



3 lbs. 

 3 lbs. 



3 lbs. 

 3 lbs. 

 3 lbs. 

 3 lbs. 



*The third application of "Sulfocide" was ^^ gallon to 50 gallons water. 

 ** Boiled with a constant volume of 10 gallons water and used at same dilution as 

 commercial concentrates. 



* Two trees in Plot 12 were accidentally sprayed on one side in the 

 second application and were omitted from the final count. 



