84 



of resistance in the future depends upon the desire of the commercial plant 

 breeders to develop higher yielding varieties containing the frego character. 

 Average yields in pounds of seedcotton per acre of frego cotton used in this 

 test were: Ames, 1405; WTES, 2017; and MFS, 1828. 



155. , and Pendergrass, J. E. 1973. The use of pheromone traps for survey 

 of overwintering boll weevil populations in west Tennessee. Tenn. Farm 

 & Home Sci. Prog. Rep. 86: 20-21. 



Preliminary results indicate that the boll weevil is capable of overwintering 

 throughout west Tennessee. This study will be continued for 2 more years to 

 evaluate the data under different weather conditions. Proceeding northward in 

 West Tennessee, the cotton acreage becomes scattered and good boll weevil 

 hibernation sites are limited. It now seems that lack of hibernation sites 

 rather than more severe winter temperatures is the main reason for lower boll 

 weevil populations in the northern than in the southern areas of West 

 Tennessee. Cotton growers north of area 1 may never have the annual boll 

 weevil pressures that exist in this area but they should know that the pest 

 survives their winters. Cotton in these areas should be inspected for boll 

 weevil infestations earlier than the normal migration period (mid-August). 



156. ; Pendergrass, J. E.; Bryan, J. M. ; and Goddard, R. J. 1973. Boll 

 weevil population suppression with late-season insecticide applications. 

 Tenn. Farm & Home Sci. Prog. Rep. 86: 11-13. 



Results from the 4 year study at Ames Plantation, Tenn., indicate that spring 

 boll weevil populations can be reduced by applying insecticides late in the 

 previous season. In-season control can be delayed by 2 to 4 weeks the follow- 

 ing season. Results are better when the treated cotton acreage is well isolated 

 from untreated cotton. Further research is needed on the summer and fall 

 biology and population dynamics of the boll weevil under Tennessee cotton 



