265 



505. , and Fye, R. E. 1969. The role of moisture in the winter survival of 

 the boll weevil complex in Arizona. J. Econ. Entomol. 62: 147-149. 



Studies made with temperature-control cabinets set for the average day and 

 night soil temperatures at Stanfield, Arizona, and with several levels of 

 moisture showed that winter survival of the boll weevil, Anthonomus grandls 

 Boheman, complex was affected by moisture. Longevity after emergence increased 

 when the levels of moisture in the bolls and in the simulated trash in which 

 the weevils were hibernating were above 0.5 and 0.044 g of water/g of boll 

 and trash, respectively. Some weevils freed from the bolls early in the 

 winter survived long enough to oviposit in the 1st squares produced by cotton 

 plants in the subsequent season and could serve as precursors for later damaging 

 generations. 



506. , and Taft, H. M. 1979. Boll weevil: capture in pheromone traps baited 

 with natural male lure and several concentrations of grandlure. Environ. 

 Entomol. 8: 62-64. 



Traps baited v/ith slow release formulations of grandlure (30-40 mg/trap) remain- 

 ed effective for 6 wk without rebaiting and captured more boll weevils, Anthono - 

 mus grand is grandls Boheman, than traps rebaited weekly with 3 or 6 mg of grand- 

 lure. A 2-fold increase in grandlure concentration produced a significant 

 increase in weevil capture, but captures were not increased additionally by 

 a 4-fold increase when the 2 concentrations were not competing for capture of 

 the same weevils. There was little difference in the attraction of boll weevils 

 to one wick containing 3 mg of grandlure or to one laboratory reared male boll 

 weevil that had fed on cotton squares. 



