26 
No. io, APRIL, 1901. 
CONCLUSIONS RELATIVE TO THE CULTURE 
OF SUGAR BEETS. * 
BY W. P. HEADDEN. 
* This appears as a Summary of Bulletin 63.* A Resume of the Publi¬ 
cations of the Colorado Agricultural Experiment ^Station, and is not here 
reprinted. 
No. 11, APRIL, 1901. 
HOW TO FIGHT THE CODLING MOTH. 
BY CLARENCE P. GILLETTE. 
Many orchardists spray for the codling moth and still 
grow very wormy apples. The writer knows of an orchard 
near the Experiment Station that was sprayed with an 
arsenical mixture three times last summer and in which 
fully 80 per cent, of the fruit was wormy at the time of pick¬ 
ing in September. Another orchard in the same neighbor¬ 
hood was sprayed twice and had less than 2 per cent, of 
wormy fruit at picking time. What made the difference? 
Why is it that one man sprays his orchard and has very lit¬ 
tle wormy fruit and his neighbor, who also sprays, has 
nearly all of his apples wormy? This is a question often 
asked and frequently difficult to answer satisfactorily. That 
a reason exists for the different results there can be no 
doubt. The object of this paper is to give the best direc¬ 
tions that we can at present for the successful treatment of 
this insect. Perhaps it will explain to some why they have 
not met with better success in the past. 
WHEN TO SPRAY. 
No date can be fixed upon, yet spraying must be done at 
the right time if the best results are to be obtained. The 
right time is immediately after the blossoms fall and before 
the calces of the forming apples close. If there are belated 
blossoms on the trees after the great mass of bloom has 
