trol of pests; release of parasites, predators and viruses; release of 

 sexually sterile insects; and identification of attractants, hormones, and 

 other biologically active compounds that occur in such trace amounts that 

 large numbers of insects are needed for study. 



925. , and Chremos, J. H. 1971. Dietary requirement of the boll weevil 



for arginine and the effect of arginine analogues on growth and on the 

 composition of the body amino acids. J. Econ. Entomol. 64: 480-485. 

 Quantitative dietary requirements of the boll weevil, Anthonomus grandis Bohe- 

 man, for arginine were determined by feeding an amino acid diet containing 

 different amounts of arginine. Citruline produced good growth and develop- 

 ment when it was substituted for arginine, but no growth occurred when orni- 

 thine was substituted. Canavanine was toxic and inhibited growth of the boll 

 weevil. This toxic effect could be partially reversed by arginine. Homoar- 

 ginine did not appear to be toxic, and, when combined with arginine, it alle- 

 viated the toxicity of canavanine. A method is described for the qualitative 

 analysis of the amino acids in boll weevils by thin-layer chromatography. The 

 contents of free and protein-bound amino acids were determined in weevils fed 

 several rearing diets and in those fed diets containing analogues. Canavanine 

 was not found in eggs and adults of boll weevils fed larval or adult diets con- 

 taining this analogue. Homoarginine was found in the free amino acids of all 

 samples, but not the protein. 



926. Vavra, J., and McLaughlin, R. E. 1970. The fine structure of some develop- 

 mental stages of Mattesia grandis McLaughlin (Sporozoa, Neogregarinida) , a 

 parasite of the boll weevil Anthonomus grandis Boheman. J. Protozool. 17: 

 483-496. 

 Sporozoltes, macronuclear schizonts, merozoites and gamonts of Mattesia grandis 

 were examined by electron microscopy. A conoidal complex, consisting of conoid, 



