14 



BULLETIX 344, TJ. S. DEPAETMEXT OF AGRICULTURE. 



The transfer of some of the weevils from cotton squares to cotton 

 bolls late in life seemed to have no effect upon their oviposition as 

 they continued ovipositing at about the same rate without a break. 



It is interesting to compare the data presented in this table with 

 the results secured by mating thurberiae on cotton squares in the 

 same manner at Victoria, Tex., in 1913. Table" III gives this com- 

 parison. 



Table III. — Comparison of results secured in Arizona and Texas with regard to fecundity 

 of Anthonomus grandis thurberiae. 



Average 



oviposition 



period. 



Average 

 eggs per 

 female. 



Average 

 eggs per 

 female, 

 per day. 



Maximum 

 eggs per 

 female. 



Days. 



Texas 32 



Arizona j 45. 1 



103.0 

 157.4 



3.2 



3.4 



173 

 309 



This table shows the greater fecundity of the variety under Arizona 

 conditions than under the unnatural environment of southern Texas, 

 although the daily rate of oviposition was much the same. 



WEEVILS FED OX COTTOX BOLLS. 



Four pairs of hibernated thurberiae were removed from the cells 

 in Thurberia bolls and mated on cotton bolls in glass tumblers in the 

 same manner that others were mated on cotton squares. The results 

 secured from these are shown in Table IV. 



Table IV. — Fecundity of Anthonomus grandis thurberiae on cotton bolls, Agua Caliente 



Ranch, Arizona, 1914- 



Source of weevils. 



Date 



first fed 

 * bolls. 



Date 



first egg. 



Period 



fed 

 bolls to 

 deposi- 

 tion. 



Date i 0Ti P°- 



Total 

 eggs. 



Av- 

 er- 

 age 

 eggs 

 per 

 day. 



Date 



female 

 dead. 



Date 



male 

 dead. 



Removed from cells in 



Thurberia bolls 



Do 



July 13 



Julv 20 

 Julv 19 



Days. 



4 



4 

 10 



Aug. 13 

 Aug. 10 

 Aug. 17 

 Oct. 14 



Days. 

 25 

 22 



29 

 55 



7 

 64 

 84 

 190 



0.3 

 2.9 

 2.9 

 3.4 



Aug. 24 

 Aug. 13 

 Aug. 30 

 Oct. 21 



July 19 

 Aug. 17 



Do 



Do 



...do !...do 



Aug. 11 j Aug. 21 





Total 





25 

 6.2 





131 J345 

 32.7 86.2 

 55 il90 



22 7 













2.6 











10 

 4 





3.4 

 .3 





Minimum 









From this table it is seen that the weevils displayed a comparatively 

 low degree of fecundity. This is seemingly in direct contradiction 

 to the results secured in the series of weevils on live plants in the 

 field and also of those offered a choice between cotton squares and 

 bolls. Quite a number of tests in glass tumblers were made during 

 the season to determine the preference displayed by the weevils in 



