231 



199 of 203 narked boll weevils contained enough dye to be seen readily under 

 the integun-ent of the abdomen. The 4 boll weevils not detected by the visual 

 examination weie found to be marked after being crushed and placed in a small 

 vial containing acetone and a strip of filter paper. 



A4A. ; Cross, W. H. ; Leggett, J. E.; McCovern, W. L. ; Mitchell, H. C. ; and 

 Mitchell, E. B. 1975. Dispersal of marked boll weevil: 1970-1973 studies. 

 Ann. Entomol. Soc. Am. 68: 1018-1022. 

 Dispersal of the boll weevil, Anthonomus grandis Boheman, was studied in 

 Mississippi from 1970 through 1973 by releasing marked adults in central 

 fields planted to cotton and locating traps at various distances and direc- 

 tions. The maximum distances sampled were 10.4 miles in 1970, 24 miles in 

 1971 and 50 miles in 1972 and 1973. Of the total of 383,061 native boll 

 weevils marked and released, 265 were recaptured at distances from the re- 

 lease site of from 1 to 33 miles. Marked weevils were recaptured at the 

 maximum distances sampled in 1970 and 1971. The longest distance, 33 

 miles, was recorded during the 1973 study. 



445. ; Cross, W. H.; and McGovern, W. L. 1976. Long-range dispersal of 

 marked boll weevils in Mississippi during 1974. Ann. Entomol. Soc. Am. 

 69: 421-422. 

 In a study of long-range dispersal of the boll weevil, Anthonomus grandis 

 Boheman, in Mississippi in 1974, 162,028 marked adults were released in the 

 center of a trap grid. Eighty-six were captured in traps located on concen- 

 tric circles at 5-mi intervals for a distance of 50 miles. Two boll weevils 

 were captured at a distance of 45 miles. This is the longest recorded for 

 marked boll weevils; it equals the distance recorded for an unmarked boll weevil 

 in Mexico. 



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