14 



PROLIFERATION IN CONTROL OF BOLL WEEVIL. 



avera^o increase in mortality apparently due to the proliferation 

 varies only between 18.1 per cent for Shine and 19.1 per cent for 

 Kin^. It appears that the "normal mortality," due to other causes 

 than proliferation, varies much more widely in different localities and 

 seasons than does the increase in mortality attributable to the 

 presence of proliferation. 



OBSERVATIONS ON BOLLS. 



Before drawing any general conclusion from Table III the similar 

 records of examinations of bolls should be considered. The same 

 varieties and localities are used as in Table III, the only change being 

 the inclusion of the examination of King bolls made at Victoria, Tex. 

 in 1903. 



T.-MJLE IV. — Comparison of fToliferation in King and Shine holJ.s in different seasons and 



localities. 



a Weighted average. 



