32 PROLIFERATION IN CONTROL OF BOLL WEEVIL. 
healing following these two operations might also be likened to the 
proliferation following artificial and weevil-made punctures. As 
the probability would be greatly in favor of mortification following 
from the untreated railway accident, so would decay be more likely 
to follow a needle puncture in a boll than would the proper healing 
of the wound by proliferation. The injection of chemical solutions 
by the hypodermic syringe would, in all probability, hinder rather 
than assist proliferation. 
Unfavorable as conditions for these tests seem, it appears that 
proliferation was formed in a perceptible degree in 40 per cent of all 
eases in which artificial punctures were made. The proportion in 
cases where punctures were left open is slightly greater than where 
ek a 
punctures were sealed, being 43.7 per cent in the former case, and 37 — 
per cent in the latter case. In all these cases the proliferation 
was entirely distinct from that caused by larve when such were 
present. In many instances the proliferation was abundant and 
very plainly characteristic, in other cases there was only a slight 
formation with more or less of decay. The fact that the experiments — 
were undertaken at very near the close of the growing season would 
account for the formation of less proliferation than might have 
resulted from similar experiments earlier in the season. 
RESULTS WITH BOLLS. 
More extensive experiments were made with bolls than with 
squares in testing artificial stimulation to proliferation. Part of the 
experiments were performed at Dallas and part at Hidalgo, Tex. ~ 
The same methods were used as with squares. The number of punc- 
tures per boll averaged about six. In the experiments at Hidalgo 
it was difficult to find bolls which were wholly free from weevil attack. 
The full data from the experiments are given in the following table: 
