THE BLACKHEAD FIREWOEM OF CEANBEREY. 



27 



Table 4. — Outline of spraying experiments in the control of the blackhead fire- 

 worm on the H. M. Williams & Son's t)og at Ilwaco Junction, Wash., 1919. 







Number gallons used per 





Berries free 

 from fire- 







M 



S 







acre per application. 





worm injury. 



M 





"3 

 > 





Spray materials, dosage, 











. 



a'S 



1 





E 



d 



o 





nozzle, and variety of 



>^ 



C3 



a 



>-t 







T3 03 



a 





c> 



tS 



6 



cranberry. 







3 



l-s . 

 -o 



+3 



II 



3 6 



> 



P. 



"3 







§8 



■Oco 



3" 



o 



Eft 



a> a, 

 > s 



o 



ai3 





a 

 '3 



"3 



a 



S 





s 



03 ■ 



B 



f^ 



<! 



&H 



^ 



e 



O 



>* 



o 



















Per ct. 



Perct. 



Per ct. 



Bush. 



Bush. 



A.... 



40 per cent, nicotine sul- 

 phate, 1-800 + fish-oil 

 soap, 2-50, mist nozzle, 

 Howe variety. 



40 per cent nicotine sul- 



378 



378 



418 





391 



1,071 



54.44 



89.35 



30.27 



31.32 



18.52 



B.... 



457 



666 



444 





522 



1,355 



58.67 



89.74 



30.66 



46. 9S 



34. IS 





phate, 1-800 -1- fish-oil 



























soap, 2-50, Bordeaux 

 nozzle, Howe variety. 

















































C 



40 per cent nicotine sul- 

 phate, 1-800 -1- fish-oil 

 soap, 2-50, "spray gun," 

 Howe variety. 



300 



389 



257 



417 



341 



1,238 



62.52 



93.05 



38.10 



56.99 



40.88 



D.... 



40 per cent nicotine sul- 

 phate, 1-800 -t- fish-oil 

 soap,2-50," spray gun," 

 Howe variety. 



300 



389 



257 





315 



1,499 



54.30 



84.25 



29.30 



75.06 



58.95 



E.... 



40 per cent nicotine sul- 

 phate, 1-800 -1- fish-oil 

 soap, 2-50, ' ' spray gun, ' ' 

 McFarhn variety. 



300 



327 



267 



268 



290 



1,075 



45.30 



87.72 



46.16 



176. 88 



161.85 



























F.... 



40 per cent nicotine sul- 

 phate, 1-800 -1- fish-oil 

 soap, 2-50," spray gun," 

 McFarUn variety. 



300 



327 



267 





298 



1,162 



41.22 



77.45 



35.89 



124. 65 



109.62 



G.... 



40 per cent iiicotine sul- 

 phate, 1-800 + fish-oil 

 soap, 2-50, Bordeaux 

 nozzle, McFarlta vari- 

 ety. 



40 per cent nicotine sul- 



563 



697 



884 



643 



697 



1,345 



69.00 



91.97 



50.41 



168. 84 



153. 81 



























H.... 



499 



388 



499 



554 



485 



2,343 



56.50 



93.81 



52.25 



364. 26 



349.23 





phate, 1-800 4- fish-oil 



























soap, 2-50, mist nozzle. 



























McFarlin variety. 

























1 



Check on lee of plats A 

 and B, Howe variety. 













479 



44.88 



59.08 





12.80 





















untreated (for check on 



























plats A and B). 

























2 



Check on lee of plats C 













626 



43.93 



54.95 





16.11 







and D, Howe variety. 



























untreated (for check on 



























plats C and D). 

























3 



Check on lee of plats F 

 and H, McFarhn vari- 













474 



33.55 



41.56 





15.03 





















ety, untreated (for 

























check on plats E, F, 



























G, H). 

























Here an effort was made to test the three types of nozzles, namely, 

 the Bordeaux, the mist type, and the spray gun, on as large a scale 

 as possible, and to approach commercial spraying conditions. The 

 plats selected ranged in approximate size from one- fourth to one-half 

 acre and included the Howe and McFarlin varieties. These were 

 previously badly infested with the fireworm and yielded few or no 

 berries in 1918. Figures 12, 13, and 14 show these three types in 

 actual use, and Table 4 shows the number of gallons per acre used 

 in spraying with each type of nozzle, with a pressure of about 250 

 pounds at the tank. A stationary power outfit was used for all the 

 applications, pipes being used to convey the spray liquid from the 

 pump to the plats. 



