SOME COTTON DISEASES IOJ 



From the egg there hatches in a few days a small, 

 white footless grub or worm which begins to 

 feed, making a larger place for itself as it grows. 

 During the course of its growth the grub or 

 larva sheds its skin and the pupa appears. In 

 this stage it is inactive and takes no food. In a 

 few days the pupa sheds its skin and the full- 

 grown weevil appears and in two or three days 

 eats its way out of the square or boll and about 

 one week later is ready to start another gene- 

 ration. 



The time required from the laying of the 

 egg to the emergence from the square or boll 

 of the full-grown weevil is from fifteen to 

 twenty-five days, depending on the season 

 the shorter time being required during very 

 warm weather. 



In the extreme southern part of cotton belt 

 there will be as many as five generations of 

 weevils in one season. In the central part of 

 the cotton belt there will be from three to four 

 generations. 



The weevil is a very prolific insect, each 

 female weevil laying during a lifetime about 

 one hundred and forty eggs, so during a season 

 it is estimated that one pair of weevils may have, 



