63 
Dr. Ustick, of Boise, used lime arsenite and banding. I estimated 
his loss to be about LO per cent. I visited these last three orchards 
September 24, and searching diligently under the bands for larvee, 
found but 3 under 30 or 40 bands. Mr. C. Hinze, of Payette, 
used Paris green with either kerosene or coal tar. He writes me that 
his total loss from all causes amounted to only 0.05 per cent. 
For contrast it might be mentioned that in Mr. Tiner’s orchard I 
found only 8 larve under bands at 18 trees, while in a neglected 
orchard on the same date (September 21) I found 94 larve on 10 trees. 
In all these cases cited the orchards were sprayed from four to six 
times. 
The pupe may be killed with the larvee under the bands by crush- 
ing. They are so well protected that this is the only practicable way 
to reach them. 
I have previously stated how the adults in a storehouse may be 
killed. A few fruit growers have told me that they caught numerous 
adult codling moths by trap lanterns. All accurate work upon this 
point has shown that the moth is not attracted to ight, the noctuids 
and sphingids caught being mistaken for codling moths. 
One grower savs he catches many of the moths in buckets in which 
there is some cider or vinegar. This fruit grower is a man well 
informed upon the subject and I tried to experiment with his remedy, 
but was stopped by cold weather and sickness. 
SUMMARY AND CONCLUSIONS. 
1. The codling moth is more injurious in Idaho than in the East, on account of 
the number and the overlapping of broods. 
2. There are three broods and probably a part of a fourth, which overlap. 
3. The moth can not be controlled by natural means. 
4. It has been allowed to get a firm foothold in the State. 
5. By several sprayings with arsenites and by banding the injury may be reduced 
to from 5 to 20 per cent, depending upon locality. 
6. I firmly believe that if the recommendations given here be followed by all fruit 
growers in a locality for one or two years that the moth would cease to be a serious 
pest in that locality. 
I recommend that this work be carried on in Idaho and possibly Oregon and 
Washington another year, as I believe this last summer’s work has simply outlined 
the problem and discovered the points to be worked upon. 
INSECTS AND THE WEATHER DURING THE SEASON OF 1900. 
By F. H. Carrrenpen. 
Investigations begun during the season of 1899 upon the effects of 
atmospheric and other conditions, in causing an increase or decrease 
of injurious insects during that year, were continued during the sea- 
son of 1900 with some interesting results. 
The studies of this subject that have been made have not been as 
complete as could be desired, but asa result of observations conducted 
