408 



that the necessary organization and cooperation can be achieved and an effec- j 



tive manag iment program accomplished. 



799. , and Jordan, L. B. 1973. A rescheduled reproductive-diapause con- 

 trol program for maximum suppression of potential overwintering boll 

 weevils in the Rolling Plains of Texas. Tex. Agric. Exp. Stn. Prog. 

 Rep. PR-3210, 1 p. 



A reproductive-diapause control program utilizing a revised application schedule f 

 proposed by Rummel and Adkisson (1971) was tested in eight cotton fields in 

 Dickens and Kent counties in 1972. Large numbers of newly emerged second and 



third generation boll weevils, Anthonomus grand is Boheman, were effectively | 



i 

 controlled beforp cviposition occurred. Oviposition was greatly reduced j 



during August and September by the revised control schedule. However, boll | 



weevil migration from surrounding untreated fields caused cortinuouS rein- i 



festation of the treated fields. The insecticide leptophos provided satis- 

 factory boll weevil control and also suppressed moderate bollworm, Heliothis 

 zea (Boddie) , populations. 



800. ; Jordan, L. B.; White, J. R. ; and Wade, L. J. 1977. Seasonal 

 variation in the height of boll weevil flight. Environ. Entomol. 

 6: 673-678. 



Pheromone traps placed at heigVits ranging from ground level-9.1 m were used to 

 study boll weevil flight in the vicinity of an infested cotton field during 

 1972-73. A definite seasonal variation in the height of boll weevil flight was 

 noted. During the spring, weevil flight from hibernation areas to cotton appear- 

 ed to be confined mostly to low levels. Over 90% of the overwintered weevils 

 were captured from ground level-4.6 m, with ca. 70-80% captured from ground 

 level-1.1 m. This low-level flight appears to be correlated with relatively 

 short-range movement by most overwintered weevils. During the late summer and 



