PROLIFERATION FOLLOWING OVIPOSITION IN SQUARES. 21 
The second significant feature of Table VI is that showing the 
effect of fertilization upon the mortality of the weevil without regard 
to the presence or absence of proliferation. A comparison of the 
percentages of mortality shown in the last column of the table 
shows us that in the case of squares there is a difference of 2.7 per 
cent and in the case of bolls of 2.6 percent in favor of the fertilized 
plats. These differences are so nearly alike in both squares and bolls 
as to indicate that fertilization, as practiced in this case, would 
increase the general average mortality by a small percentage, but 
that this increase was not due-to any increase in the proportion of 
cases showing proliferation. 
One general fact should be stated in regard to field conditions in 
connection with these observations. As has been stated, the experi- 
ment was located in the Brazos bottom. The application of fertil- 
izer produced little apparent difference in the size of plants, and the 
difference between varieties was by no means as marked as is usually 
the case. It is possible that upon soil naturally less fertile greater 
differences might have been produced both as regarding varietal char- 
acters and the effect of the application of fertilizer. From the data 
at hand, however, we would not venture to predict that such differ- 
ences would result in any greater increase in the mortality of the 
weevil than has been found in the observations here reported. 
PROLIFERATION FOLLOWING OVIPOSITION IN SQUARES. 
The next series of observations to be presented will deal with a 
comparison of varieties in regard to the formation of proliferation 
following egg punctures in squares. The comparison includes obser- 
vations made during three seasons and includes about 25 varieties. 
The table shows also the increase in mortality due, apparently, to 
proliferation. It is impossible to obtain a close comparison of varie- 
ties in this examination, as the conditions of soil, cultivation, and 
season were so diverse, and the influence of these varying conditiors 
can not as yet be even closely estimated. In the following tabula- 
tion are included records where there were less than 100 observations 
in the series. It is noticeable that the greatest differences in the 
percentage of squares examined which showed proliferation occurs 
in cases where examination was made of only a small number of 
squares and late in the season. It is evident that the data in these 
cases are insufficient as a basis for reliable conclusions regarding those 
particular varieties, but the figures may be included in the totals of 
examinations made without materially disturbing the general averages. 
