ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 131 
THE CODLING MOTH. 
The treatments given and dates of applications are shown in 
Table VIII. 
TasLe VIII.—Dates of applications for codling moth and plum curculio, one-spray 
method. Crozet, Va., 1909. 
Plat V. | Plat VI. Plat VIII. 
(Demonstration. ) (One spray method.) (Unsprayed.) 
Date of application. 
First application, April | Not drenched. Vermorel noz-| Drenched with arsenate of lead | Unsprayed. 
27 (after falling of zles. Mist spray. Arsenate 2 pounds to 50 gallons Bor- 
petals). of lead 2 pounds to 50 gallons deaux mixture (2-2-50). 
Bordeaux mixture (2-2-50). Pressure 125-160 pounds. 
Pressure 120 to 140 pounds. Seneca nozzles. 11 gallons 
per tree. 
Second application, |...-. (60) Ane 5c Haan acme | Bordeaux mixture only (2-2- Do. 
May 24. | 50). Not drenched. 
hind appuUcs ion Une ees COkesseace ae ea aes see soe ae Be Ona ae sey oe eects ee | Do. 
26. | 
Fourth application, C(t a aan Or eee tee SARNLOR Sed tend Sra crac ota Do. 
July 26-27. 
Plat V (demonstration) received four applications in all, the Ver- 
morel nozzle being used. The effort was made to spray thoroughly, 
but none of the trees was drenched. Plat VI (one-spray method) 
was thoroughly drenched, using’ Seneca nozzles, applying an average 
of 11 gallons per tree. This plat received three subsequent appli- 
cations of Bordeaux mixture only, as shown in the schedule, to 
protect the fruit from possible infection by bitter rot. Plat VIII 
was left unsprayed throughout the season for purposes of comparison. 
The first application, on April 27, was given just after most of 
the petals had fallen, and conditions were favorable for the work 
except that showers interrupted the spraying for about one hour. 
At the time of the second application, May 24, the weather was 
showery, but spraying was finished without serious interruption. 
The third application, on June 26, was interrupted near the close of 
the work by rain, while the fourth application, on July 26, was made 
under very favorable conditions, the weather being clear and dry. 
Comparatively little bitter rot developed during the season, even on 
the unsprayed plat. A heavy hail, however, which occurred during 
late June, badly injured the fruit and foliage. It was noticed that 
the hail injury to the fruit resulted in a much greater proportion of 
codling-moth larvee entering on the side, and this fact must be taken 
into account in the consideration of the results. 
Table IX gives the total wormy fruit and fruit free from codling- 
moth injury for the entire season for the eight count trees of each 
plat, the numbers of the trees in the figure agreeing with those in 
the table. 
