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sprayed once a week, or until it is apparent that the weevil has been 
checked and is fully under control; in that case, or as soon as the 
cotton checks up in its new growth, the intervals can be extended to 
one spraying every two weeks. 
CONCLUSIONS. 
Without doubt spraying is effective and advisable if suitable poison 
solution can be prepared and then applied with suitable apparatus. 
However, it must be plain from the discussions in the foregoing pages 
that spraying should not be depended upon solely, but in conjunction 
with the cultural methods. Neither system used alone will attain the 
greatest efficiency. If either one is to be depended upon alone, the 
cultural methods are far more economical and efficient, and are capa- 
ble of more general application under a greater variety of conditions. 
There can be no question of the desirability and the advantage of spray- 
ing, but it should be secondary, and should be practiced in conjunction 
with the cultural system. 
Another reason for spraying is that the application of poisons makes 
sure of destroying all insect pests of cotton which feed upon its foliage. 
The careless worm (also called web worm) on cotton early in spring is 
completely destroyed. Then, too, the early scattering broods of the 
leaf worm, or army worm, are poisoned and all the tremendous expend- 
itures for poisons and poisoning late in the season against these pests 
are largely saved. 
