L --..^T ■-;-, -.■ 



127 



occurred during the 2nd week posttreatment with these compounds. Of 8 compounds 

 tested in mbination with busulfan (1,4-butanediol dimethanesulfonate) , only 

 0.08-0.1% busulfan with 0.4-0.5% hempa showed promise. Treatment with this 

 combination reduced fecundity to about 0.2 adult progeny per treated female 

 crossed with untreated males, permanently sterilized males, and caused less 

 than 50t mortality in 3 weeks. 



235. ; Eaton, J.; and Klassen, W. 1972. The use of Fumidil-B to reduce 

 microsporidium disease in colonies of the boll weevil. Ann. Entomol, 

 Soc. Am. 65: 942-9A5. 



When FuHiidil-B® was fed to larval and adult boll weevils, Anthonomus gr and is 

 Boheman (Coleoptera: Curculionidae) , to reduce the percent of weevila infect- 

 ed by a microsporidian (designated as 1069), a dose of 0.25% in the adult diet 

 resulted in an average of 2% infected weevils (determined by presence of spores) 

 at 2 weeks post-emergence compared with 21% infection of similar weevils fed 

 diet without Fumidil-B. Longevity was not affected by this does, but fecun- 

 dity and egg hatch were reduced to 32 and 76% of the control, respectively. 

 Weevils from a diseased colony fed larval and then adults diets containing 0.15 

 and 0.0025% Fumidil-B, respectively, were 12% diseased compared with 36% of 

 weevils reared and maintained on untreated diets. 



236. ;T^alk, E. L.; Klassen, W. ; and Greenburg, D. 1971. Biological effects 

 of irradiation with thermal neutrons on boll weevils fed boric acid 

 containing boron-10^. J. Econ. Entomol. 64: 1002-1008. 



Studies were conducted to determine whether the boron reaction (n,a) could be 

 used to increase the sterility induced in Anthonomus grand is Boheman by irra- 

 idation with thermal neutrons. Wlien reared on larval diet containing 0.01 or 

 0.1% boric acid (Hj^^BO-) and irradiated with fluences of 1.34 - 2.25 X 10^^ 

 N^j^/cm /sec X time = fluence) weevils showed no increased mortality or sterility 



