79 



the Texas Department of Corrections cotton farms. Estimated net returns would 

 be expected to increase $55.87 ($22-61 on a per acre basis) with adoption of the 

 new pest management strategy compared to the traditional strategy. Hie Trinity 

 Ri"er region of the Texas Departvnent of Corrections cotton farms indicate that 

 the new pest management strategy brought about a 50% reduction in per hectare 

 quantity of insecticides used (from 12.28 to 6.22 kg [10.8 to 5.6 lb]), a 90 kg/ 

 ha (80 lb/acre) yield increase, and $85.50/ha ($34.62/acre) net return increase. 

 Expanding these results to the 86.8 thousand hectares (215 thousand acres) to . 

 cotton in the surrounding area indicates that the new pest management strategy 

 would increase cotton output by over 27.4 thousand bales, reduce quantity of 

 insecticides applied by 607,000 kg (14. million lb) while increasing producer 

 net returns over 5 million dollars. 



144. Cate, J. R.; Curry, G. L.; and Feldman, R. M. 1979. A model for boll 

 weevil ovipositional site selection. Environ. Entomol. 8: 917-921. 



A model for the selection of boll weevil oviposition sites by siz; category 

 is presented. The pr.o'ctions of the preference model are similar to ten 

 weekly experimental . ^stributions obtained throughout the 1978 growing 

 season. Chi-squared goodness of fit tests support the model predictions; 

 whereas, the nonpreference hypothesis for ovipositional site selection is 

 statistically rejected. 



145. , and Skinner, J. L. 1978. Fate and identification of pollen in the 

 alimentary canal of the boll weevil, Anthonomus grandis . Southwest. 

 Entomol. 3: 263-265. 



Pollen collected from the gut of boll weevil, Anthonomus grandis Boheman, 

 can be utilized to positively identify food plants of this weevil. Pollen 

 grains are excreted from the gut by 18 hrs after feeding and may be voided 

 by 10 hrs after feeding if the weevil feeds subsequent to a particular 





