11 
ing of 1,900 bolls by the method of Tables II and III. 
therefore be given as below : 
Table V. 
This study may 
1 Number. 
Per cent. 
Good bolls ] 371 
.722 
.088 
.190 
Loss by Boll Worm . „ . , i 1 67 
Loss by otber causes 362 
1,900 1.000 
1 
Averaging this result with that of Table IV we have the table given 
below as the result : 
Table VI. 
Data. 
Good boiis. L^rwofi ^*£« 
causes. 
Total 
loss. 
Table V 
Study V 
Average... 
Per cent. Per cent. Per cent. 
. 7215 . 0835 . 195 
. 722 . 088 . 190 
Per cent. 
. 2785 
.2780 
. 72175 
.08575 ; .1925 \ .27825 
The above calculations certainly give the Boll Worm as much credit 
as it deserves, and for the following reasons : T^e observations were 
made after the cotton bad been "laid by v late in July, therefore the 
fallen bolls collected from the ground in September covered what had 
fallen during August and September. This is the period of greatest 
damage to the cotton. No cornfields near by to lessen and detract from 
the egg deposition on cotton. This in addition to the consideration of 
the injured fruit actually on tlie plants but which was likely to shed, 
certainly does not make the results arrived at much below the entire 
damage done during that period. 
From the results given above and from subsequent observation it is 
evident that bottom-land cotton is worse infested than the "hill-coun- 
try " cotton. Further, even in the same field, as is shown by the record 
of plants 5 and 10 of Table II and plants 12, 16, and 21 of Table III 
large, rank, leafy cotton plants, bearing a great number of forms and 
bolls, are subject to much more serious attack. 
The number of forms and bolls which one worm may destroy during 
its period of existence can only be approximated. From the rate of 
feeding during favorable conditions and when the larval state is about 
15 days the number eaten into may range from ten to twenty. During 
the longer periods of larval existence caused by unfavorable conditions, 
the worms are inclined to move about more and perhaps injure more in- 
dividual fruits, though the absolute amount eaten is not much greater. 
What the extent of injury due to Boll Worm over the entire State of 
Mississippi was the past year will be seen from the closing weather 
and crop report of Prof. R. B. Fulton, observer, U. S. Signal Service, 
