145 



Results showed that when an equal number of matings with sterile and normal 

 males occurred, both equally influenced overall egg hatch. The initial mating 

 in the sequence had little effect on overall egg hatch, while the last mating 

 prior to oviposition was most influential on subsequent egg viability. Only 

 slight differences were noted between egg fertility from single and double 

 matings, an indication that little additional sperm is transferred in the 2nd 

 mating if it occurs within a few hours. The unlikely chance that numerous 

 normal matings would occur during a sterile-male-release program when an over- 

 whelming number of sterile males is present and the low percentage of viable 

 eggs that actually develop into adults from combined matings with normal and 

 sterile males should negate any adverse effects of alternate matings on the 

 program. 



274. , and Davich, T. B. 1968. Influence of population density on mating 

 behavior of cbemosterilized, untreated or overwintered boll weevils, 

 Anthonomus grandis. Ann. Entomol. Soc. Am. 61: 834-836, 



Untreated Anthonomus grandis Boheman females, paired with untreated males, 

 mated significantly more than did untreated females paired with males treated 

 with apholate, or overwintered females paired with overwintered males. With 

 1 exception, the number of mean matings f6^ each combin-ition housed in each _ 

 »r=-3=4if ferent sized mating chambers was significantly different^ from that 

 in the 2 other mating chambers housing the same combination. As the size 

 of the mating chamber was increased, simulating a decrease in population 

 density, matings of all combinations of weevils decreased. 



275. , and Davich, T. B. 1968. Sexual competitiveness of tiale boll 

 weevils sterilized with apholate unaffected by diet. J, Econ. Entomol. 

 61: 852-853. 



Sexual competitiveness is a basic consideration for a sterile-male-release 



