

234 



emerging from fruit after early December exhibited locomotory activity during 

 warm winter days than weevils emerging during October or November. Activity 

 during mid-winter exposes weevils to environmental extremes not occurring in 

 protected overwintering sites, and thus may be detrimental. Distribution 

 studies of boll weevils in leaf litter indicated no relationship between time 

 of emergence from fruit during the fall and vertical distribution in leaf 

 litter. More weevils were found in the upper 5.1 cm of litter than in under- 

 lying litter. 



451. , and Sterling, W. L. 1979. Manipulation of red imported fire ants 

 in a trap crop for boll weevil suppression. Environ. Entomol. 8: 1C73- 

 1077. 



Red imported fire ants were introduced into an early-planted East Texas cotton 

 plot, while ants were essentially removed from a control plot with Mirex. In 

 the ant plot, predation by ants reduced the number of emerging T-^ weevil adults, 

 and weevil damaged squares never exceeded 16.6% through June and early July. 

 During this time incidence of weevil damaged squares in the Mirex plot in- 

 creased to 38.8%. 



452. , and Sterling, W. L. 1979. Rata- and thresholds of boll weevil 

 locomotory activity in response to temperature. Environ. Entomol. 



• 8: 874-878. 

 Boll weevils collected from pheromone traps and newly eclosed adults were tested 

 for locomotory activity at various temperature and light-dark conditions. Greater 

 flight activity was observed during the light than dark cycle for pheromone trapped 

 and boll reared weevils. Light-dark conditions did not appear to affect walking 

 activity. Temperature thresholds for flight and walking averaged 14.0° and 2.6''C, 

 respectively. 



