133 



latlons in the remainder of the plants. However, the correlations are not 

 of sufficient magnitude to allow estimates for the lower portions to be 

 derived fr>>m counts made in the upper two or three 6-tnch- increments. 

 From 70 to 100% of the insects observed were in the upper 2 feet of the 

 plants. 



248. . 1972. Relationship of temperatures to boll weevil complex 

 populations in Arizona. U.S. Dep. Agric. Prod. Res. Rep. 136, 14 pp. 



The major factor affecting the boll weevil complex ( Anthonomus grand is 

 Boheman) in Arizona is temperature. The development and mortality of 

 individual \7eevils as well as the entire population are directly associated 

 with the temperature in the oviposition sites and on the soil surface and 

 indirectly with the heat input resulting in maturation of cotton plants. 

 Individual weevil development, the population fecundity, longevity, and 

 mortality and the maturing of cotton plants may be estimated with equations. 

 These were developed with least squares analysis from several untransformed 

 forms of cubic and quadratic, transformed forms of cubic and quadratic, the 

 Fourier series, asymptotic, and logarithmic models. The equations accurately 

 describe the relationship of the several phenomena with time or heat input. 

 The boll weevils are suppressed by high temperatures during June, July, and 

 frequently August, but their population increases as cooler fall temperatures 

 ensue and the"" early maturing cotton bolls release an accumulated population 

 of boll weevils to oviposit in late fruit. 



249. , and Bonham, C. D. 1969. Estimating temperatures and heat flux in 

 insect environments in stubbed cotton fields in the winter. J. Econ. 

 Entomol. 62: 823-829. 



Simple linear regression models of the temperatures of dry bolls, soil 

 surface, cotton stalk trash, trash-soil interface, and growing tips from 





