A new type of diapause boll weevil control 

 program consisting of two phases was con- 

 ducted in the High Plains of Texas during the 

 fall of 1965. Phase one carried out in Septem- 

 ber had as its objective the killing of the last 

 1965 generation of reproductive females with 

 three applications of malathion made at 5-day 

 intervals. Theoretically, these applications 

 should have broken the weevil's reproductive 

 cycle and prevented the females from laying 

 the eggs that might later develop into the over- 

 wintering adults. In phase two, four applica- 

 tions of malathion were made at 10- to 14-day 

 intervals during October and November until 

 the first killing frost to kill any adults that 

 might have survived the phase-one treatments 

 or that might have developed from eggs laid 

 before the control program was initiated. 



Results indicated that the new-type program 

 was highly successful. The potential overwin- 

 tering population in the control zone at the 

 time of frost was estimated to be 99 percent 

 smaller than that in nearby untreated acreages. 

 In addition, inside the control zone the adult 

 boll weevil population at this time was 93 per- 

 cent smaller than at a similar time in 1964. 



3. Agee, H. R. Characters for determina- 

 tion of sex of the boll weevil. Jour. Econ. 

 Ent. 57: 500. 1964. 



Examination of the last two posterior seg- 

 ments of the body of the boll weevil with a 

 binocular microscope reveals differences in ap- 

 pearance and size between the sexes, which 

 permit differentiation with complete accuracy. 

 The eighth tergum of the male is about one-half 

 as wide and long as the seventh tergum of the 

 female. The distinguishing characteristic of the 

 eighth tergum of the male is the notch in its 

 ventral portion. Diagrams are given. 



4. ANGALET, G. W. Bracon greeni (Hy- 

 menoptera: braconidae), a potential parasite 

 of the boll weevil. Indian Jour. Ent. 26: 447- 

 452. 1965. 



Under laboratory conditions, at Moorestown, 

 N. J., the parasite B. greeni accepted boll weevil 

 larvae as a host and was able to complete its 

 life cycle. Larvae of five other insects were 

 ignored. 



In India B. greeni attack both lepidopterous 

 and coleopterous hosts, apparently selecting 

 hosts that feed in seed pods. In India it is an 

 important parasite of the pink bollworm. It 

 might be valuable in controlling such pests as 

 the boll weevil and pink bollworm if introduced 

 into the United States. 



5. Bartlett, A. C. Two confirmed muta- 

 tions in the boll weevil. Ent. Soc. Amer. Ann. 

 57:261-262. 1964. 



Examination of 2,500 adults of a laboratory 

 strain of boll weevils yielded 27 phenotypic de- 

 viants. Subsequent testing of these 27 adults 

 showed that only two of the aberrations were 

 simply inherited and both were controlled by 



single recessive genes. One of the mutant adults 

 exhibited a milky eye color. The other adult 

 had its head recessed into the prothorax and 

 was designated bashful. 



6. Bartlett, A. C. Black body color in the 

 boll weevil. Genetics 52: 427. 1965. (Ab- 

 stract of paper presented at Genetics Society 

 of America 1965 Meetings, Fort Collins, Colo., 

 Sept. 8-10, 1965.) 



Wild-type body color of the boll weevil is 

 described as reddish brown or mahogany-red. 

 Two-mutants, which cause black body color, 

 have been isolated. The first, slate (s), which 

 produces the black phenotype when homozy- 

 gous, is inherited as a semidominant autosomal 

 factor. The heterozygote (s/ + ) is an obvious 

 bronze color. Ebony (e) , the second mutant, is 

 also a semidominant autosomal factor causing 

 a black color in the homozygous state. This 

 black is indistinguishable from the homozygous 

 slate. The heterozygous state of ebony (e/ + ) 

 body color is dark bronze and is easily dis- 

 tinguished from the heterozygous slate. Prog- 

 eny from crosses between slate and ebony are 

 all a dark bronze identical to heterozygous 

 ebony. F 2 ratios indicate no linkage between 

 the two loci, but data are not yet complete. A 

 homozygous slate ebony line is being established 

 so that backcross data may be obtained. 



7. BECKHAM, C. M. Pelleted cotton squares 

 and other plant parts as food for adult boll 

 weevils. Ga. Agr. Expt. Sta. Leaflet (n.s.) 36, 

 7 pp. 1962. 



Pelleted squares, blooms, and bolls were 

 tested as possible laboratory food for boll 

 weevils. It was concluded that whole fresh cot- 

 ton squares and seedling plants are satisfactory 

 as food for maintaining adult boll weevils in 

 the laboratory. Weevils did not live sufficiently 

 long on pellets made from squares, blooms, or 

 bolls, and from pellets containing squares plus 

 gelatin or agar. The problem encountered with 

 the pellets was wetting and their inability to 

 retain moisture due to their dryness and hard- 

 ness. 



When pellets were too moist the growth of 

 mold on them probably reduced feeding and 

 longevity of the weevils. However, pellets were 

 changed frequently in the cages. Further studies 

 are needed to find other materials to incor- 

 porate in the pellets that will overcome these 

 difficulties and to determine why the weevils 

 are short lived even though highly attracted to 

 the pellets. 



8. Beckham, C. M. Seasonal studies of dia- 

 pause in the boll weevil in Georgia. Ga. Agr. 

 Expt. Sta. Mimeo. Ser. 161, 12 pp. 1962. 



Studies on the seasonal occurrence of dia- 

 pause in the boll weevil were conducted in four 

 areas in Georgia during 1960 and 1961. Weevils 

 in diapause were found in Early County on 

 August 12 and in Gordon County on August 22. 

 The two counties are approximately 200 miles 



