»,a^n.Lwn.»i«. » «.im J I M I ..mm ir im ji ' J I ) ^ 1 w ii J i tj^lliyjg> i j]ijj i ji jjij i t jw i i j i j l ti, i i iM i i t i ' iMi w»;j!pwyi B i <jj l i>;,lj^ i i.tJ i wmJWf wwiwwgiy M | i J II I . I I I n il i| H n nmui. i ^ ' W- ' .-U ■ 



500 



988. Wright, J. E.; Haynes, J. W. ; and Jurd, L, 1978. Cotton, laboratory 

 determination of reproductive inhibitors with the boll weevil. Insecti- 

 cide and Acaricide Testing 4: 219. 



Laboratory reared adults (25 newly emerged, mixed sexes) were immersed in ace- 

 tone solutions of the candidate chemicals for 5 sec, air dried, and held at 

 27*'C and 60% RH, fresh field squares (cotton buds) were then provided daily 

 (1 square/5 weevils) for feeding and ovioosition. Also, the candidate chemicals 

 were placed in the adult diet (0.5%), and newly emerged adults were allowed to 

 feed for 3 days. Eggs from both treatments were collected; one-half the eggs 

 were held for hatch, and one-half the eggs were placed on larval diets for 

 determination of adult emergence. High adult mortality was obtained with 

 chemicals JURD-2693 and JURD 2581 when incorporated within the diet. Chemical 

 JURD 2335 in the diet also gave a reduced adult emergence. None of the com- 

 pounds were active when tested by dipping in acetone solution. 



989. ; Haynes, J. W. ; McCoy, J. R.; and Dawson, J. R. 1979. Boll weevil; 

 mating ability, sterility, and survival of irradiated and fumigated 

 adults of different ages. Southwest. Entomol. 4: 53-58. 



The percentage of male boll weevils, Anthonomus grandis grandis Boheman, that 

 mated successfully (transferred spermatozoa to virgin females) differed when 

 males were newly emerged or aged (ca. 6 days old) at time of treatment with 

 either irradiation and diflubenzuron or fumigation and penfluron. More males 

 were available to mate after the irradiation treatment because of the signifi- 

 cantly higher mortality (P < 0.05) among fumigated males at day 7 posttreatment. 

 Both treatments suppressed better than 99% of the F, population. 



990. ; McCoy, J. R. ; Dawson, J. R. ; Roberson, J.; and Sikorowski, P. P. 

 1980. Boll weevil sterility: effects of different combinations of diflu- 

 benzuron, antibiotics, fumigation, and irradiation. Southwest. Entomol. 

 5: 84-89. 



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