73 



The lactic dehydrogenase and acetylcholinesterase enzymes of the boll weevil, 

 Anthonomus grandis , have been shown to be inactivated by dye-sensitized photo- 

 oxidation mediated by substituted xanthenes. The efficiency of the photo- 

 oxidation reaction was correlated with the degree of halogenation of the dye 

 molecule, the efficiency of the dye in singlet oxygen formation, and the 

 strength of binding to lactic dehydrogenase. Changes in the in vivo levels 

 of these enzymes due to ingestion of rose bengal by adult weevils are not 

 further modified in the presence of light. 



132. Camp, H. B., and Arthur, B. W. 1967. Absorption and metabolism of 

 carbaryl by several insect species. J. Econ. Entomol. 60: 803-807. 



The absorption and metabolism of C carbaryl was studied in the house fly, 

 Musca domestica L.; stable fly, Stomoxys calcitrans (L.); boll weevil, Anthonomus 

 grandis Boheman; and rice weevil, Sitophilus oryza (L.)- Following topical 

 applications of carbaryl, the percentage of the applied dose absorbed by each 

 species of insect within 24 hours was: stable fly 56.7%, house fly 37.3%, boll 

 weevil 12.2%, and rice weevil 3.3%. Five metabolites, including 1-naphthol, 

 were isolated from insects by Florosil and thin-layer chromatography; 4 meta- 

 bolites were unidentified. Carbaryl was quite stable in both species of weevils. 

 The major metabolite in the feces of house flies was a highly polar material. 

 There were no qualitative differences in number of metabolites isolated from 

 house flies, boll weevils, and rice weevils, but there were quantitative diffe- 

 rences in each metabolite present in the internal extract. The species speci- 

 ficity of carbaryl appeared to be functions of rate of absorption and enzymatic 

 degradation within the particular insect species. 



133. Canderday, T. D. 1975. Evaluation of insecticides for cotton insect con- 

 trol in Georgia. J. Ga. Entomol. Soc. 10: 25-32. 



Labeled and experimental insecticides, applied conventionally and ULV, were 

 compared for efficacy against the boll weevil, Anthonomus grandis Boheman, 



