275 



fol} owing the July 16 release were considered as evidence that the weevils left 

 the release area in both varieties. The second release, at a site removed from 

 the first, was more effective. The check variety exhibited A4 percent punctured 

 squares as conipared to 12 percent for the Frego plants, according to counts made 

 two v^eeks cfter release. The rolled bracts of the Frego plants should permit 

 better insecticide coverage of the exposed buds than on normal buds. Logically, 

 one should expect a lower recovery of worms in Frego following a standard insecti- 

 cide application. Such was not the case in these tests. No variety-insecticide 

 interaction was detected. 



521. Lindig, 0. H. lb''6. Mass rearing of boll weevils. j[n Boll Weevil Suppression, 

 Management, and Elimination Technology. Proceedings of a Conference, 

 February 13-15, 1974, Memphis, Tennessee. U.S. Agric. Res. Serv. [Rep.] 

 ARS-S-71, pp. 50-52. 

 In less than two decades, the rearing of boll weevils has evolved from the 

 laboratory rearing of a few insects per week on natural food to the production 

 of millions tcr week. These advances are the result of the work of many 

 researchers, t...? most important being the development of an artificial diet 

 in 1957 by Vanderzant and Davich. The development of an artificial diet on 

 which the boll weevil could be perpetuated not only started researchers to 

 work on mass rearing, but also allowed nutritional studies to begin. Vanderzant 

 subsequently made many studies on lipid requirements, and on defined diets to 

 establioh amino acid, carbohydrate, and mineral, and vitamin requirements. 

 Cast (1963) realized that in order to mass rear the boll weevil, not only was 

 an efficient and economical diet necessary, but mechanical devices were also 

 required. Much of his work was on improving the procedures for egg extraction, 

 implanting eggs on larval diet, and preparation of oviposition diets. He also 

 designed improved cat^.es for holding the adults and developed a method for 

 collecting emerging adults. Many of his developments, some with modifications. 



