93 
b}^ the codlino- moth in 1902 was ({u'lUi viiriji})l(', as thoro had Im'cii })iit 
a scattcrint^' fruit crop the year before, and conse({uently a lack of 
insects in some localities. 
The orchard of the Wilson Fruit Company, which is a type of the 
very ))est connnercial orchards in Idaho, was planted in isO-t by Hon. 
Edgar Wilson, and wa.s sold l)y him to the company which is the pres- 
ent owner in the early spring of 1902. Mr. Wilson acted as manager 
for the orchard compan}' for the season, aided by Mr. W. ¥. Cash. 
This orchard consists of 650 Ben Davis trees, 500 Jonathan, 750 Rome 
Beauty, 141 Northern Sp}^, and 800 trees which were planted as Wolf 
River, but were subsequently ])udded to Jonathan, and have not yet 
come to bearing. There are three short rows of Pewaukee, and a few 
trees of other varieties scattered throughout the orchard. 
The house in which the apples were packed and the culls stored in 
the fall of 1901 is about 200 feet from the orchard and has always 
been a source of infection for it. (PI. IV, ligs. 2 and 3.) Early in the 
season of 19<)2 Mr. Wilson purchased a gasoline-power spra}^ outfit and 
prepared to give the orchard a thorough spraving. The improvements 
made l)y Mr. Wilson and Mr. Cash have rendered this machine one of 
the most efficient for this purpose. A single spraying was accom- 
plished in about four days, using lime arsenite with soda exclusively 
as a spraying solution. A})out 2,000 very heavily loaded trees were 
in bearing. The conditions of the previous season were such that 
there was an abundant supply of insects present in 1902, except in the 
Rome Beaut}^ section. The writer estimated in 1901 that from 4<» to 
60 per cent of the fruit in the Jonathan and Ben Davis sections was 
infested, no late spra3^ing having been made; and the small amount of 
fruit in the Rome Beaut v section was all infested. 
No bands were used, except upon the trees left unsprayed and a 
ver}^ few near the apple house. The blossoms of the flonathan and 
Ben Davis were fully open about May 10, and had droppinl about May 
20. The Rome Beautv blooms through a longer period of time, and 
some blossoms were observed as late as June 1. S})raying should have 
begun about May 19, but on account of contimied rains it was delayed 
until the 2od, at which time the orchard was given a thorough s])ray- 
ing. After two weeks th(^ orchard was again spraytnl. at about the 
time the first larvie were l)eginning to enter the fruit. Hy the 1st oi 
July about all of the larvie of the first generation had entered the fruit. 
Countings on the B(mi Davisand the Jonathan section ga\e an av(Mage 
of a little less than 1 per c(Mit infested, while the Pewauket^ trees, 
which were unspraycnl, had from 20 to 2(5 per cent infestinl. The 
Jonathan tree nearest the a])ple house had about T) \h'v cent wormy, 
but this percentage^ decreased rapidly in the surrounding trees. Other 
orchai'ds in the same condition showed from 10 to 50 ]Hn' cent wormy; 
while orchards in which no renunlial measures had btHMi appruHl, and 
in which no insects were left over from the ^•ear i>(^fori\ showed a verv 
