8 
to the attacks of this moth than others, and a list was prepared in order 
of injury. In 1901 but little revision of the list was necessary. 
The following is the revised list: 
Pewaukee (always badly infested). 
Red Astrakan. 
Bellflower varieties. 
Spitzenberg. 
Grimes Golden, Northern Spy, Gravenstein. 
Wealthy. 
Baldwin. ~ 
Ben Davis (very variable) . 
Rome Beauty (variable). 
Jonathan. 
Winesap (always least infested). 
This list was made from observations in many orchards and is a 
composite of the conditions in these orchards. Local conditions are 
to a great extent the cause of the variability. 
Pears are but little infested when compared with apples. In the 
very worst localhties the injury sustained rarely if ever reaches 20 
per cent, and, when remedial measures are used, injury varies from 5 
to 15 per cent. 
Many quinces were examined, but not a single case of infestation 
was noted. . 
Having in mind Professor Bruner’s observations when he found 
larvee which he took to be those of the codling moth feeding in seed 
pods of roses, the writer examined hundreds of these pods without 
finding any laryee or eggs. 
It has often been reported that the codling moth larve were attack- 
ing peaches, prunes, and plums. Upon investigation it was found in 
every case that the attack was made by the larva of the peach-twig 
borer. 
INTRODUCTION AND SPREAD OF THE CODLING MOTH IN THE 
NORTHWEST. 
Dr. C. V. Riley, in his Sixth Missouri Report (1874), mentions this 
insect as working in Utah, where it had evidently been introduced a 
year or two previous. 
The Scientific American of November 14, 1882, mentions that the 
codling moth made its appearance in California in 1874. 
Prof. J. M. Aldrich states that this insect has been known in the 
Clearwater Valley since 1887, and in southern Idaho nearly as long. 
By many orchardists in southern Idaho the writer was told that the 
above date is approximately correct. Many stories are told of how 
the insect reached Idaho, one being to the effect that the insect was 
introduced in dried prunes. Without doubt the insect was introduced 
in apples shipped either from Utah, Oregon, or Washington. When 
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