BOLL *VEEVIL CONTROL BY USE OF POISON. 29 
A very accurate check plat should be provided; otherwise the 
question of gain or loss is likely to be more or less problematical. 
For this purpose several fairly uniform cuts should be selected, sub- 
ject to about the average degree of weevil infestation in that locality, 
and only one-half of each cut treated, letting the remainder go un- 
treated as a check on results secured. A little experience of this 
sort will soon make clear the conditions under which the grower 
can or can not poison profitably. Of course, this unpoisoned check 
plat will serve to increase the infestation of the adjacent poisoned 
cotton, but this shght loss will be far more than offset by the value 
of the information secured. 
Weevil poisoning has in some cases been criticized as possibly 
tempting the farmer to neglect securing the proper varieties of 
cotton and cultivating properly, and other important factors or 
operations which have been learned as a result of hard experience 
with the boll weevil. On the contrary, by eliminating weevil injury 
it should encourage the planter to strive for the increased yield 
which can be induced by good farming, and to emulate the man 
who practices such a good method of farming that his gain from 
weevil poisoning is tremendously increased. Wo one should slight 
any other operation involved in the production of the cotton crop 
just because the plants are being poisoned. Weevil poisoning can 
not make cotton. It is up to the farmer and the land to do this, 
and the best that can be expected of poisoning | is to save this cotton 
from weevil destruction. 
CONTROL OF THE COTTON LEAFWORM AND FALL ARMY WORM 
y WITH CALCIUM ARSENATE. 
One question which frequently arises in connection with the use 
of calcium arsenate is whether or not this material will control the 
cotton leafworm, fail army worm, or any other pests of this nature. 
It will undoubtedly be as satisfactory for this purpose as any 
chemical which could be utilized. It is very nearly as poisonous as 
Paris green to the worms and has the decided advantage of being 
cheaper and less injurious to the plants. In case anyone desires to 
utilize weevil-poisoning equipment solely for leafworm control, 
however, he should bear in mind that he could considerably reduce 
the expense of the operation without interfering with its effective- 
ness by mixing equal parts of lime and calcium arsenate and apply- _ 
ing this mixture at the rate of about 4 or 5 pounds per acre. 
