16 



tenuis Auct. and Fusarium monillforme Sheldon. No Infection or rotting of 

 the bolls was caused by either organism from contact inoculation. 



I .25. Bailey, J. C; Maxwell, F. G. ; and Jenkins, J. N. 1967. Boll weevil 



I antibiosis studies with selected cotton lines utilizing egg-implantation 



£ 



I techniques. J. Econ. Entomol. 60: 1275-1279. 



t Two techniques of implanting eggs of the boll weevil, Anthonomus grandis 



Boheman, in cotton buds were used to compare antibiosis in 12 lines of 

 Gossypium (7 G^. hirsutum L. , 1 G^. arboreuni L. , 1 G^. arboreum x G^. hirsutum , 

 1 £. davidsonii Kellogg, 1 G^. barbadense L. , and 1 G. thurberi Todaro). Data 

 obtained in greenhouse and field-cage studies included: boll weevil weights 



at emergence, days to emergence, number of buds, number of buds blooming out, 



f 



I size of buds (length and diameter), number of boll weevils from buds, and 



I 



i number of boll weevils from buds blooming out. Da/s required to develop and 



I 



; weights of adult weevils differed significantly between cotton lines within 



1 



i each test. Cotton lines showing antibiosis worthy of further study were: G. 



! arboreum , G. thurberi , G. davidsonii , and 1 G. hirsutum (experimental line 



I ~~~ 



I SA 13). 



i 



I 26. ; Maxwell, F. G. ; and Jenkins, J. N. 1967. Mortality of boll weevils 



f 



I 



I in squares of genotyplcally different lines of cotton. J. Econ. Entomol. 



f 60: 1279-1280. 



I 



% The mortality of Immature forms of Anthonomus grandis Boheman, dissected from 



I cotton squares from genotyplcally different lines of cotton, ranged from 10% 



I to 53%. In both greenhouse and field tests the highest mortality occurred In 



I 



I the larval stage. Adult mortality was higher in field cages than in the 



{ greenhouse. Since the dead larvae had not fully consumed the availab7.8 food 



and no proliferation of tissue or other physical aberrations were evident, 

 death was probably caused by toxic substance (s) , lack of proper nutrients. 



