attacked, and partly to the improvement in the rest of the Delta 

 which has madeTthe improvement in the experimental zone less 

 obvious. 



However, although one may rely with confidence on the figures 

 given above rather than on the general impression of field observers, 

 it would be unwise to incur the hostility of the whole agricultural 

 population for the sake of an improvement which can only be detected 

 by careful laboratory counts. It therefore seems advisable to give 

 up boll-picking as a universal compulsory measure but to retain the 

 power of enforcing it again if further experience shows such a course 

 of action to be necessary or desirable. 



EAELINESS. 



Even before the common boll worm was superseded by the more 

 dangerous pink boll worm, earliness in harvesting the cotton crop 

 was insisted on by the Government entomologists as being of prime 

 importance in boll worm control. Earliness in ripening means a 

 lighter attack at the time of picking, and earliness in pulling up the 

 plants means a lighter attack in the following season. 



In Table V are given the numbers of moths which emerged from 

 green and open bolls collected by Mr. Adair at Gemmaiza on various 

 dates between August and October 1918. They are divided into 

 " short-cycle " moths, i.e. those which emerge in the autumn and 

 winter, and " long-cycle " moths, i.e. those which emerge between 

 April and October the following year. All research to date tends to 

 show that provided that the short-cycle moths can find no living 

 plants on which to lay their eggs, they die without leaving any 

 progeny. It is the long-cycle worms which, hibernating through the 

 winter and producing moths during the following cotton season, 

 carry on the infestation from one year to another. 



TABLE V. 



