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116 



216. Douglas, A. G. 1966. Selection in cotton for antibiosis to the boll 

 weevil, Anthonomus grandis . J. Econ. Entomol. 59: 32-34. 



Forty-five experimental cotton lines and 2 commercial varieties were evaluated 

 for antibiosis to the boll weevil as measured by percent emergence of adult 

 weevils from squares with oviposition punctures. Range of percent emergence 

 was from 15.3 to 59.2 and differences were highly significant. Percent 

 emergence was not correlated with number of squares with oviposition punctures 

 or with weight of squares. 



217. Dumas, W. T., and Gilliand, F. R. 1973. Nozzle arrangement for insect 

 control. Ala. Agric. Exp. Stn. Highlights Agric. Res. 20(Summer): 1. 



Yield data show that 1, 2 or 3 nozzle per row treatments yielded almost 

 t^idce as much seed cotton per acre as the untreated check with little diffe- 

 rences existing among the yields from the treated plots. In each of the 3 

 years of testing, all nozzle arrangements tested have resulted in equally 

 good insect control and cotton yields, 



E • 



218 Earle, N. W. 1980. Heat induced paralysis in the adult boll weevil, 

 Anthonomus grandis ; Effect on reproduction and longevity. Environ. 

 Entomol. 9: 309-310. 

 Boll weevils, A. grandis Boheman, remained paralyzed for 1-6-h following 5 

 min exposures to temperatures between 46 and 51 degrees. Males were slightly 

 more tolerant than females. The 28-day survival of males that had remained 

 comatose for approximately 1 day after exposure to 50 degrees C was no diffe- 

 rent than that of the controls. Females treated at this temperature remained 

 paralyzed for 1-2 days, but then resumed normal feeding activity and laid 

 ali&st as many viable eggs as the controls by the 7th day posttreatment. 



.1 



