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314 



population of the boll weevil, Anthonomus grandis , about 30-40% of the adults 

 fed on the bait. However, rain prevented continuous and optimum coverage of 

 the plants with the bait. Both pathogens suppressed the populations of weevils, 

 thus producing a further demonstration of the validity of the principle of 

 using response-eliciting materials in a bait containing a pathogen o induce 

 disease. 



610. , and Lusk, J. W. 1967. Morphogenesis of testes and ovaries in the 

 boll weevil, Anthonomus grandis (Coleoptera: Curculionidac) . Ann. Entomoi. 

 Soc. Am. 60: 120-126. 



The testes of Anthonomus grandis Boheman develop during larval stages from 

 imaginal discs of primordial germ cells located in lobes of adipose tissue at 

 about the 5th-7th abdominal segment. They are large enough to be seen through 

 the integument during the second instar. Ovarial growth is somewhat slower, 

 but the ovaries can be seen easily in third-instar larvae. The sex of larvae 

 can be determined visually. Mitotic division of spermtogonia and oogonia occurs 

 during larval development, and the male germ cells prepare for meiotic divisions 

 during the prepupal stage. ITie divisions were detected immediately after pupa- 

 tion. The change from larval growth to metamorphosis into adult structures 

 was thus correlated with a change in the testes from mitotic multiplication to 

 meiotic maturation. 



611. . ; Scott, H. A.; and Bell, M. R. 1972. Infection of the boll weevil 

 by Chilo iridescent virus. J. Invertebr. Pathol. 19: 285-280. 



When infections with Chilo iridescent virus (CIV) were induced in larvae of boll 

 weevils, Anthonomus grandis , by intrahemocoelic injection or by feeding, and in 

 adults by feeding, the typical blue coloration of adipose tissue developed at 

 3-7 days por^tinfection, and mortality occurred after 3 days. The sjonp tomato logy 

 and the pathological expressions depended on the initial infectious titer. The 



