266 



507. Lincoln, C. 1969. The effect of agricultural practices on insect habi- 

 tats in a typical Delta community. Proc. Tall Timbers Conf. Ecol. 

 Animal Control Habitat Manage. 1: 13-18. 



The Jefferson community in Desha County, Arkansas has undergone two revolu- 

 tionary habitat changes in the past 20 years. The synthetic organic insecti- 

 cides made possible great increases in cotton yields. By destruction of 

 beneficial as well as pest insects they required additional insecticide 

 inputs. An appreciation and knowledge of these beneficial insects led to 

 an effective program of integrated control. 



508. . 1976. Seasonal development of the boll weevil. Ix^ Boll Weevil 

 Suppression, Management, and Elimination Technology. Proceedings of a 

 Conference, February 13-15, 1974, Memphis, Tennessee. U.S. Agric. Res. 

 Serv. [Rep.] ARS-S-71, p. 9. 



A given field may provide abundant squares for weevil development for 6 to 9 

 weeks, depending on soil fertility, variety, weather, irrigation, etc. At 2.5- 

 fold rate of weekly increase, the seasonal population increase would be 100- 

 fold in 6 weeks and 1,600-fold in 9 weeks. A boll weevil control program, as 

 presently practiced, utilizes the actual rate of increase in deciding whether 

 or not to apply insecticides. In a boll weevil elimination program, it would 

 be prudent to assume the maximum rate of increase. 



509. . 1978. Discussion and evaluation of alternative approaches to boll 

 weevil management. In Boll Weevil: Management Strategies. South. Coop. 

 Ser. Bull. 228, pp. 126-130. 



Immediately available management strategies practiced to varying degrees 

 are: 1) off-season suppression or avoidance of heavy carry-over populations 

 by use of insecticides for diapause control, destruction of favorable hiber- 

 nation sites where they are limited in area, growing of cotton in low-hazard 



..V 



