98 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 9 



included some Catawbas, Delawares and a few Niagaras. A series 

 of different sprays were used, applying the poison at different strengths, 

 using it without and with Bordeaux (3-4-50 and 4-4-50) and also 

 without soap, with soap, and with Bordeaux and soap in order to 

 compare the effectiveness of the poison in different combinations. 

 The various plots were sprayed just before the grapes bloomed June 

 9 to 12, just after the grapes bloomed June 18 to 21, and again on July 

 18 to 21. No moths had appeared at the latter date, but it was 

 thought best not to digress too radically from previous experimental 

 work in which good results were obtained. In the hand-sprayed 

 plots the first and second sprayings were omitted to test the value of 

 one thorough spraying later in the season. 



The bulk of the brood of moths coming almost three weeks after 

 the third spraying, together with the final results showing serious 

 injury by the grape berry worm throughout the vineyard, seemed to 

 indicate that the final spraying must be made some two or three weeks 

 later than had been previously recommended. 



The spray was applied with a power machine of large capacity and 

 at 200 pounds pressure. The spars were of the fixed type, but the 

 nozzles were not pointed at right angles to the grape row. The noz- 

 zles were placed comparatively low down and were angled so that the 

 spray was thrown upward and outward as well as forward and back- 

 ward, meeting the roof of the leaves edgewise instead of throwing the 

 spray against the roof -like protecting surface of the leaves. The 

 special spars were designed by the author, in order to completely cover 

 the bunches of grapes with spray in a thorough manner, approaching, 

 if possible, the best hand-spraying in covering capacity without extra 

 labor. The abihty to cover a considerable area of vineyard rapidly 

 with a mmimum expense for labor was also an important item, as 

 directing the spray nozzles by hand adds to the cost of spraying grapes. 

 These spars with the nozzles angled outward and upward saved the 

 labor cost of the two men required to direct the nozzles in hand spray- 

 ing. Paste arsenate of lead was used in varying amounts and in com- 

 binations with Bordeaux and soap. The results are given below with 

 data concerning the treatment of the plots : 



Plots at Euclid — 1913 

 First Application, June 9 to 12 



Poison Fungicide Sticker 



Plot 1 As. of Lead 3# 2-3-50 Bord. Hard Soap 1# 



3# 3-4-50 " 



4# 4-4-50 " " " 1# 



3# " " 1# 



3# 3-4-50 " Flour in Paste 



3# 3-4-50 " Hard Soap 1# 



