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237 



boll weevils, Anthonomus grandls Boheman, exposed to 2 rates of each of azin- 

 phosmcthyl and methyl parathion. The method developed in this paper can be 

 used to otudy insect population dynamics as affected by the timing and rates 

 of insecticide applications, increasing insect resistance to insecticides, and 

 the use of different insecticides. 



A58. ; Smith, D. B.; Colwick, R. F.; and Scott, W. P. 1971. Computer 



studies involving boll weevil damage to cotton. Miss. Agric, For. Exp. 

 Stn. Inf. Sheet 1161, 4 pp. 

 Insect control continues to be one of the major economic problems of the cotton 

 fanner. This study involves efforts to predict how much damage is caused to the 

 squares of the cotton plant by boll weevil populations and how the damage to the 

 squares will ultimately affect yield. It was found that the plant tends to 

 adjust to insect damage and if allowed enough good weather, it will produce 

 as much as an undamaged plant. Predictions of actual pounds of lost yield 

 should provide better information for more efficient insect control programs 

 to maximir.e the producer's profits and keep pollution potential to a minimum. 



459. ; Thompson, A. C; and McKinion, J. M. 1975. Developing a computer 



model with various control methods^or eradication of boll weevils. Proc. 

 1975 Beltwlde Cotton Prod. Res. Conf., p. 118. 

 In May, 1974 ARS personnel of the Boll Weevil Research Laboratory (B\>JRL) and 

 the Cotton Production Research Unit, at Mississippi State, Mississippi, co- 

 operated Jointly and assembled information to develop a descriptive model for 

 boll weevil eradication. This model was to be used to help identify critical 

 research needs and to study synchronization of components of insect suppression 

 measures. Three submodels evolved from this effort — pheromone trapping, sterile 

 insect release, and insecticide effectiveness — are in various stages of testing. 



-N., 



