' *"' '" -' ' "'.'":. '""- i 



288 



549. ; Jenkins, J. N. ; Parrott, W. L.; and Davlch, T. B. 1972. Effect of 

 dyes on body fat and eye color of ebony pearl boll weevils. J. Econ. 

 Entomol. 65: 370-373. 

 Different marking techniques for Anthonomus grandls Boheman were tested. Ebony 

 pearl individuals were reared on larval media containing 1000 ppm of the follow- 

 ing dyes: (1) Caico Oil Red N-1700®; (2) Acridine Orange; (3) Eosin-Bluish; (A) 

 Sudan II; and (5) Nile Blue A. Calco Oil Red N-1700 was theuonly dye which 

 sufficiently dyed the eye and body fat of emerging adult weevils. Adult ebony 

 pearl weevils were fed adult media plugs for 6 days containing Calco Oil Red 

 N-1700 in the media or wax covering, or media and wax covering of plugs. Body 

 fat of the weevils was dyed red, but the eyes were unmarked. Dye (5000 ppm) 

 in the wax covering of plugs also dyed the body fat, but not the eye. Ability 

 to obtain 2 different markers, body fat and eyes or body fat only, depends 

 upon whether the dye is fed to larvae or adults. 



550. McClendon, R. W. ; Mitchell, E. B.; Jones, J. W. ; McKinion, J. M. ; and 

 Hardee, D. D. 1976. Computer simulation of pheromone trapping systems 

 as applied to boll weevil population suppression: a theoretical example. 

 Environ. Entomol. 5: 799-806. 

 An analysis of a pheromone trapping system was performed to study the possi- 

 bility of theoretically estimating the efficiency of a boll weevil pheromone 

 field trapping system. Release-capture data for a single trap were used to 

 establish percent capture versus distance from the trap. A computer simula- 

 tion model predicting trapping efficiency showed that results are very sensi- 

 tive to the responsiveness characteristics of the population. Theoretical re- 

 sults also showed sensitivity to trap spacing and identified some specific 

 research needs. 



~\j^':-'.-i^ ' 



