32 BULLETIN 1032, U. S. DEPAKTMEXT OF AGKICULTURE. 



plane. In this position the uprights would be bent over slightly and 

 the tips as well as some of the lower leaves given a thorough wetting. 

 As seen in Table 4, three applications with this tj^pe of nozzle on 

 the Howe variety (plat D) resulted in an increase of 58.95 bushels 

 per acre over check, and 84.25 per cent of the berries examined were 

 free from fireworm injury. Four applications on the same variety 

 on the adjoining plat (plat C) resulted in a gain in jield of only 

 40.88 bushels over the check, doubtless because of the thin setting of 

 blossoms on this plat, but 93.05 per cent of the fruit examined from 

 the sample areas was free from fireworm injury. 



Fig. 14. — fSpray-gun used in spraying experimental plats. Shows size of stream of spray 

 used, with medium-sized disk at full capacity. 



On the McFarlin variety (plat F) three applications gave a gain of 

 109.62 bushels per acre over the untreated vines, 77.45 per cent of the 

 examined fruit being free from fireworm injury. Four applications 

 (plat E) gave better results, a gain of 161.85 bushels over the un- 

 treated vines, 87.72 per cent of the examined fruit being sound. 



The The?:e Types of Nozzles Compared as to Economy of Time and ^L\tertal. 



With the Bordeaux outfit (fig. 12) it took about 1-^- hours to spray 

 an acre, an average of 609 gallons being necessary for a thorough 

 application. It was necessary to walk about 24 times across the 

 acre, which was in the form of a square. With the mist outfit 

 (fig. 13). it took about 1 hour to spray an acre, 438 being the average 



