85 



grovring conditions. With these data, better timed diapause programs could be 

 initiated which could return more dollars to the cotton grower. For the best 

 results, cotton acreage in a diapause control prograu' should be included in a 

 cotton insect scouting program the following growing season. 



157. Chesnut, T. L. , and Cross, W. H. 1971. Arthropod parasites of the boll 

 weevil, Anthonomus grandis . 2. Comparisons of their importance in the 

 United States over a period of thrity-eight years. Ann. Entomol. Soc. 

 Am. 64: 5A9-557. 



In 1965, a survey was made across the cotton belt from South Carolina through 

 Texas to determine the current status of parasitism of the boll weevil, 

 Anthonomus grandis Boheman (Coleoptera: Curculionidae) . Samples were taken 

 from A2 cotton fields. Also, results of similar surveys made in 1934, 1935, 

 and 1936 were summarized and compared with those of the 1927, 1930, and 1965 

 surveys. In 1965, 12.77% of the boll weevils were parasitized compared with 

 4.05% in 1934. More parasites were found in weevil larvae in hanging squares 

 than in larvae in fallen squares, and parasitism was higher in weevils 

 collected from cotton grown in the hill region than in weevils collected from 

 cotton grown in the coastal plains. Some developing resistance to insecticides 

 in the parasites was suggested by records of heavy parasitism in treated fields. 

 Bracon>-mellitor Say was much the most important natural parasite and accounted 

 for 74.5% of the parasites recovered in 1965. Aliolus curculionis (Fitch) and 

 Eurytoma gossypii Bugbee ranked second and thirc , and accounted for 12.3 and 5.3% 

 of the parasites, respectively. 



158. Childress, D., and Williams, P. P. 1973. Control of a bacterial contami- 

 nant of boll weevil diet. J. Econ. Entomol. 66: 554-555. 



In our laboratory, loss of boll weevils, Anthonomus grandis Boheman, from 

 microbial contamination of the diet has been a regular occurrence (1-20% 



