ONE-SPRAY METHOD FOR CODLING MOTH, ETC. 119 
A 
to what extent russeting of the fruit might result from so liberal a 
use of the fungicide. The treatment for Plat III was identical with 
that for Plat I, except that Vermorel nozzles were used. It was 
desired to determine the comparative merits of a mist spray as against 
a coarse spray, and it will be noted that the quantity of liquids required 
per tree for the mist spray (Plat III) was somewhat less than one-half 
the amount necessary in the-drenching work (Plat I). 
The results presented include all of the drop fruit throughout the 
season and the fruit from the trees at picking time in the fall. All 
apples were carefully examined as to worminess from the codling moth 
and as to injury by the plum curculio and lesser apple worm. Fruit 
from Plats I and III was badly injured by the apple blotch, which 
can be accounted for only by the omission of Bordeaux mixture from 
the treatment given immediately after the falling of the petals. 
Fruit from Plat IZ, which had been thoroughly drenched with Bor- 
deaux mixture using Bordeaux nozzles, was not noticeably more 
russeted than in the case of fruit from the demonstration plat and 
was free from apple blotch. Plat IV showed some infection from 
scab owing to the fact that it had not been sprayed with Bordeaux 
mixture before the blossoms opened. 
THE CODLING MOTH. 
In Table II are shown results of treatments of Plats I, ITI, IV, and 
V as to injury from the codling moth. Plat IT is not here considered 
nor subsequently, as the point involved, namely, the effect on the 
fruit of a drenching spray of arsenate of lead and Bordeaux mixture 
after the falling of the petals, has already been indicated. There was 
not noticeably more russeting of the fruit on Plat II than on Plat IV 
which received the demonstration treatment. 
TaBLE II.—Sound and wormy apples from one-spray, demonstration, and unsprayed 
plats. Siloam Springs, Ark., 1909. 
PLAT I. ONE SPRAY (BORDEAUX NOZZLES). 
Condition of fruit. Tree 1.| Tree 2.| Tree 3.| Tree 4.) Tree 5. | Tree 6. | Tree 7. | Tree 8. 
WORRY ae aoe sxicise bo cic esis sictee'aias 703 522 419 118 181 222 286 315 
HET Bes stata tress oh icin otis 2 ctenciee 4,986 | 4,291] 3,377 | 2,632) 3,265] 3,540] 3,021 5, 128 
CEBU A  otptanicit eee oe oacteeen 4 5,689 | 4,813 | 3,796 | 2,750] 3,446] 3,762 | 3,307 5, 443 
Perigenweound.-- -+.)5--2sesecsdecucc 87.65 | 89.16 | 88.97 | 95.71] 94.74] 94.19] 91.36 94. 22 
\ Total 
Condition of fruit. Tree 9. |Tree 10./Tree 11.) Tree 12. | Tree 13. aoe per cent 
Pow sound. 
WOPRM sce cass sod sescetewerstelnwess 110 113 Pe acmooncasal Cnecaacrioe pe i eseseer 
BOUNG eens. vsehsic okies Suaeemossanes ByASO) I 2,039) '|| (By AOL bmcneptaeine|ecngeeeen.c 405 O32 Veracca te 
otal S22 72. ssi Metsesteneacee OpOOY R25 O0e ||| S800" semen see ca] aeele nsec gb a iY -Al Aete 
PETCentSOUnd., .'<4 ime aoe yee eonaslce Ta EIN Te CAE TSG Yk. Se Seem ee ee ll eee cree 92.76 
30490°—Bull. 80—12——9 - 
