April, ’18] 
CHILDS: CODLING MOTH IRREGULARITIES 
229 
Table II— Codling Moth Behavior for the Years 1914-1917 Inclusive, Hood River, Oregon 
(Compiled from Breeding Cage and Field Notes) 
First Generation 
1st Moth 
Emerged 
1st Egg 
Deposited 
1st Egg 
Hatched 
Egg Dep. 
Completed 
1st Worms 
Leave Fruit 
First 
Pupation 
July 
9 
June 
24 
July 7 
April 
27 
May 
28 
May 
31 
July 
14 
July 
14 
July 18 
May 
26 
Jufie 
10 
June 
15 
August 
8 
July 
25 
August 1-8* 
June 
15 
June 
25 
June 
27 
July 
26 
July 
20-26 
July 26-August 2* 
Second Generation 
July 19 
July 27 
August 2 
September 25 
September 5 
September 20 
July 26 
August 10 
August 12 
August 31 (few pupa pres.) 
August 18 
August 25 
August 28 
late September 
August 3 
August 8 
August 10 
October 16 
August 31 
* Exact date not obtained. 
were quite cold accompanied by many days of rain. This prevailing 
condition had a very marked influence on plant development; leaf buds 
on the apple trees did not begin to burst till the first of May. At this 
time during the years 1914 and 1915 the petals were falling followed 
shortly by the calyx spray. Even after this late bursting of the foliage, 
development continued to be very slow owing to the continued low 
temperatures. The average maximum temperature for the month of 
May was but 62 degrees. A temperature of 70 degrees was not reached 
until the last day of the month. With the arrival of June, weather 
conditions changed; continued warm, settled weather following June 4. 
The first moths, however, did not emerge in the cages until June 15. 
This observation was checked up with orchard conditions during this 
period and no moths were found to have issued under field conditions 
up to this time. This date was nearly a month and a half later than 
the first emergence in 1915 and 20 days later than in 1916. From 
June 15 on, however, activities of the, moths progressed at war time 
speed. Favored with ideal weather conditions, the large numbers of 
worms which established themselves on the tree trunks and protected 
locations throughout the summer of 1916 issued as moths and appar¬ 
ently deposited their full quota of eggs. The first eggs were found on 
June 25, practically one month later than in 1915 and 15 days later 
than in 1916 which was in itself a late season. Hatching eggs were 
noted on June 27 and on July 26 or at the same time noted in 1916 
worms were found leaving the apples to undergo their normal changes. 
On August 3 the first moths of the second brood issued and eggs were 
