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by weather, crop status and management practices. Trans. ASAE 20: 121- 



125, 131. 

 A model is presented here for the population dynamics of the boll weevil. 

 Each component of the equations developed is described separately, and the 

 matheriatical analysis is tied together with biological reality. 



456. ; Bowen, H. D. ; Stinner, R. E.; Bradley, J. R. , Jr.; Sowell, R. S.; 

 and Bacheler, J. S. 1975. Female boll weevil oviposition and feeding 

 processes: a simulation model. Environ. Entomol. 4: 815-821. 



A model is presented for predicting the number of cotton fruit damaged per 

 day by reproducing female boll weevils, Anthonomus grandis Boheman. Tcie 

 model separately considers the egg production and the oviposition process of 

 the female boll weevil. The oviposition process depends on the availability 

 of eggs in the oviducts, preferential site selection, and the availablity of 

 sites. Components of behavior for individual female boll weevils are considered 

 and expected crop damage is projected for population of insects. Data are 

 presented and compared with simulated results and the sensitivity of the 

 model to changes in pertinent parameters is discussed. 



457. ; Lloyd, E. P.; and Stinner, R. E. 1977. Insect population mortality: 

 a dynamic model of insecticide effectiveness. Environ. Entomol. 6: 799- 



sof. 



The study of insect-pest management systems requires knowledge of the effective- 

 ness of applied insecticides. The study reported here was conducted to develop 

 a method to estimate insecticide induced mortality of an insect population 

 depending on the rate of application, the persistence of the insecticide, a 

 dosage-mortality relationship, and the time of exposure of the insects to a 

 treated area. A logarithmic equation was developed to estimate the cumulative 

 percent mortality with time. The model was validated using mortality data for 



