REPORT OF COMMITTEE ON PUBLICATION 



227 



Plot 1 Unsprayed; number of bunches, 33; number of sound berries, 

 767; number of wormy berries, 692; per cent wormy, 47. 



Plot 6 was sprayed by going only once between the rows with the 

 traction sprayer with fixed spars. No soap was used in the spray that was 

 put on this plot. 



Plot 10 was double machine sprayed; that is, the rows were sprayed 

 twice by going over the rows from opposite directions. In Plot 10 the 

 bunches were much freer from berry worm injury and there was but one 

 of the badly injured bunches of grapes which seemed not to have been 

 reached by the spray, as indicated by the number of injured berries. 



This is also typical of the results obtained in latter experiments and 

 indicates how unsprayed bunches of grapes tend to increase rapidly the per- 

 centage of wormy grapes. 



Comparing bunches as picked at random from different sprayed plots the 

 difference in spraying is very noticeable. Plots 6 and 10 give some striking 

 differences in thoroughness of application and differences in effectiveness 

 of sprays. 



Sound 

 32 

 46 

 26 

 32 

 17 

 34 

 64 

 42 

 46 

 71 

 46 

 40 

 58 



Showing the effectiveness of different treatments. 



No. of 

 Plol 



TWO POISON SPRAYS. 

 DATE OF SPRAYING 



First 



3 June 2-7 



6 June 2-7 



10 June 2-7 



13 June 2-7 



Second 

 June 15-20 

 June 15-20 

 June 15-20 

 June 15-20 



Third 

 July 9-14 

 July 9-14 

 July 9-14 

 July 9-14 



HOW SPRAYED 



Single Machine 

 Double Machine 

 Double Machine 

 Hand Sprayed 



SPRAYED WITH 



Plot First Second Third 



3 Bordx.. .. Bordx. & As. of Lead Bordx. & As. of Lead 



6 Bordx. .. .Bordx. & As. of Lead Bordx. & As. of Lead 



10 Bordx.. ..Bordx. & As. of Lead Bordx. & As. of Lead, Soap. 



13 Bordx... Bordx. & As. of Lead, Soap.. ..Bordx. & As. of Lead, Soap 



-lound 

 Berries 

 . 1,175 

 . 1,291 

 . 1,426 

 . 1,511 



Wormy 

 Berries 

 237 

 157 

 30 

 21 



Wormy 

 16.8 

 10.8 



2 



1.3 



