.r-"n 



141 

 formulated into pellets that also serve! as oviposition sites, were placed 

 in wire baskets raised 3/16 inch above a screen-bottomed rearing cage 

 designt d with solid top and sides so that all light came from below the 

 cage. 



266. . 1966. A spray technique for implanting boll weevil eggs on 

 artificial diets. J. Econ. Entomol. 59: 239-240. 



The container was filled with the implanting solution, sealed, and the 



compressed gas adjusted to 12 psi. Tlien an open petri dish containing 



larval media was held 3 in. below the spray nozzle and the pinch cock 



was opened to allow approximately 1 ml of implanting solution to spray 



on the larval media with this equipment, one technician can implant 300,000 



eggs/hr in petri dishes. Since less injury to the eggs and embryo occurred, 



the spray method increased yields. 



267. , and Davich, T. B. 1966. Boll weevils. In Carroll N. Smith (ed.). 

 Insect Colonization and Mass Production, pp. A05-418. Academic Press, 

 New York. 



The boll weevil, Anthonomus grandi s Boheman, has been a major pest of cotton 

 for nearly half a century. Studies on this insect were limited to field- 

 reared weevils until 1957, when Vanderzant and Davich (1959) first developed 

 an artificial larval diet. Since then, progress in laboratory rearing of the 

 boll weevil has reached a point where it is possible to produce the millions of 

 weevils needed for a sterile male release eradication program if and when such 

 a program becomes feasible. Mass production raethos must be mechanized and often 

 are not suitable for small cultures or for specific experiments, especially 

 when it is desirable to obtain the highest possible yield of adults from a 

 given number of eggs. It is possible to obtain yields of 75 to 80% by use of 

 hand methods, while with efficient mechanical methods yields may be as low as 

 10 to 15%. The cost of rearing weevils by hand methods, however, may be over 



