451 



884. ; McHaEfey, D. G.; and Borkovec, A. B. 1977. Uptake and residues of 

 chemosterilants In boll weevils treated by fumigation or dipping. J. 



i Econ. Entomol. 70: 427-430. 

 Uptake and residues of hempa and c.iiotepa in Anthonomus grand is Boheman steri- 

 lized by vacuum fumigation, atmospheric fumig<^tion, or vacuum dipping were de- 

 termined. When comparable sterility was achieved in either type of fumigation 

 treatment, the uptake of hempa was 10-100 times that of thiotepa. However, the 

 uptake at atmospheric pressure was lower than that in the vacuum treatment. 

 Thiotepa induced 99-100% sterility in all treatments but its uptake was lowest 

 in the fumigation at atmospheric pressure. The uniformity of uptake by in- 



' dividual weevils was higher in the atmospheric fumigation than in the dipping. 

 No residues of thiotepa were detected in treated weevils 4 days posttreatment 

 but traces of hempa persisted for as long as 16 days posttreatment. 



' 885. Texas Agricultural Experiment Station. 1969. Glasscock County, Texas, 



farmers unite fighting ole boll weevil. Tex. Agric. Prog. 15(1): 22-23. 

 Desire and a common goal are two necessary ingredients for effective group 

 action. The farmers in Glassrock County can speak from experience on these 

 two matters. They recognized their problem and decided to do something about 

 It. A fr.ll diapause control prog, am with Guthion applied to 15,000 acres of 

 cotton dPS^-ieslly reduced boll weevil numbers that entered hibernation suites 

 and with winter mortality reduced infestations in the subsequent crop. 



886. Thomas, B. R., and Wright, J. E. 1980. Titers of 20-hydroxyecdysone in 



boll weevil pupae. Southwest. Entoraol. 5: 69-71. 

 Pupae of the boll weevil, Anthonomus grand is Boheman, were found to have a 

 maximum of 20-hydroxyecdysone 48 hrs after the prepupal stage. No a-ecdysone 

 was detected. A simplified high performance liquid chromatography (HPLC) 

 method for analysis of ecdysones was developed. 



iU.inrtiTjui- "■ • 



