281 



Howevpr, measurable ebony populations following the termination of sterile-male 

 relea.'.es indicate (1) effective male sterility decreased as releases ended, and 

 (2) tie importance of accidently released, partially sterilized females increases 

 when releases are terminated. If releases of sterile males had continued, a 

 high level of effective sterility would likely have continued as well. 



533. ; McCoy, J. R.; Scott, W. P.; Burt, E. C; Smith, D. B.; and Tingle, 

 F. C. 1972. In-season control of the boll weevil with ultra-low-volume 

 sprays of azinphosmethyl or malathion. J, Econ. Entomol. 65: 1153-1156. 



A 3-year field study showed that ultra-low-volume formulations on azinphosmethyl 

 (0-125 lb/acre) or malathion (0.5 lb/acre), when they were applied on a 4- or 

 5-day schedule, gave in-season control of Anthonomus grandis Boheman. 



534. ; McCoy, J. R.; Stewart, J. R.; and lorries, W. J. 1972. A portable 

 shaker for sampling populations of overwintering boll weevils in surface 

 woods trash. J. Econ. Entomol. 65: 1502-1503. 



The new shaker is adapted from the mechanical shaker attributed to the late F. F. 

 Bondy and is mounted on the bed of a 1/2-ton pickup truck. It eliminates pack- 

 aging and unpacking crude samples, most of the grass trash is left at the collec- 

 tion site, which eliminates the disposal problem and the processing of samples 

 at collection site and permits many more samples to be transported in a vehicle; 

 ca. 20 crude samples vs. 100 processed samples, even though 1/2 the bed space is 

 occupied by the portable shaker. 



535. , and Merklj M. E. 1966. A field-cage study of population dynamics of 

 the boll wf:evil. J. Econ. Entomol. 59: 83-86. 



In a 2-year replicated field-cage experiment with boll weevils, Anthonomus 

 grandis Boheman, first-generation progeny from estimated overwintered populations 

 of 1, i;, 25, 50 and 100 weevils per acre damaged 0, 28, 46, 66, and 83% of the 

 squares, respectively. Second-generation weevils damaged '.rom 84 to 96% (weevil- 



