465 



9'.5. . 1972. A better boll weevil trap. Agric. Res. 20(10): 11. 

 A new inexpensive trap for boll weevils captured twice as many of these 

 ,otton pests as did standard sticky traps in several test locations. 

 Designated the Leggett trap after is principal designer Joseph E. Leggett, 

 the trap adapts a paper mache liner used for cut flowers and is painted a 

 bright yellow to attract boll weevils from the field. Live, caged weevils 

 or grandlure, a synthetic sex attractant, placed at the narrow end of the 

 cone lure the pests into a plastic or screen cage. The insects can then be 

 collected or killed by a small amount of insecticide. 



916. . 1974. Boll weevil sterility. Agric. Res. 23(5): 15. 



A simple behavioral test has helped to determine quickly and accurately the 

 degree of sterility in laboratory reared male boll weevils. Locomotion as 

 a measure of vigor can predict the efficiency of the chemosterilant busulfan. 

 The more physically active the weevils are, the less sterile they are judg^a 

 to be. The locomotor test developed by ARS research entomologist was used 

 successfully during the 1973 phase of the Pilot Boll Weevil Eradication 

 Experiment. 



917. . 1974. Nematode [sic] parasitized boll weevil. Agric. Res. 22(8): 11. 

 A new genus of a nematode that parasitizes the boll weevil has been found for 

 the first time in North America. A natural enemy of the boll weevil, it is a 

 worralike parasite which penetrates the body cavity of the insect and kills it. 

 The nematode causes the weevil to emerge from hibernation sites abnormally 

 early. Especially hungry because the parasites have depleted their stored 

 fat, the weevils invade the cotton fields In late March, 4 to 6 weeks before 

 the cotton is planned. Finding no cotton, they die, meanwhile releasing the 

 female nematodes in the soil to infest later generations of weevils. 



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