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new experimental strains of cotton, when planted in high density culture, seem to 

 escape weevil damage and reduce winter carryover. 



956. ; Niles, G. A.; Gannaway, J. K.; Bradshaw, R. D.; and Glodt, R. E. 1976. 

 Narrow row planting of cotton genotypes and boll weevil damage. J. Econ. 

 Entomol. 69: 249-253. 



Studies of the relationship of Anthonomus grandis Boheman to short season cottons 

 cultured in different planting arrangements were carried out in Texas for 3 

 seasons; a single experiment was conducted in each season. Effective blooming 

 periods of ca. 30 days before buildup of 2nd generation boll weevil populations 

 resulted in yields of 600-800 lb lint/acre from certain genotypes. This in- 

 creased production was associated with the ability of a genotype to retain a 

 high percent of its flowers during the blooming period. Maximum earliness 

 and yields were recorded with genotypes planted 2 drills on 40-in. beds or 

 single drills on 26 2/3-in. beds. 



957. Warner, R. E. 1966. Taxonomy of the subspecies of Anthonomus grandis 

 (Coleoptera: Curculionidae) . Ann. Entomol. Soc. Am. 59: 1073-1080. 



In the years since the thurberia weevil, Anthonomus grandis thurberiae Pierce, 

 was described, attempts to separate it from the boll weevil, A. ^. grandis 

 Boheman, by using the characters noted by Pierce have met with indifferent 

 success. In an intensive study of specimens clearly representative of the 2 

 named subspecies of grandis , 3 characters were found to distinguish thurberiae 

 from grandis , namely, curvature of the setae of the pronotrum, sculpture of the 

 metepistemum, and shape and sculpture of the scutellum. When these characters 

 were used to define the limits of distribution of thurberiae and grandis , not 

 only was the distribution of the 2 weevils revealed, but also some populations 

 were f oimd to differ from typical forms of both. The name Anthonomus grandis 

 grandis is used for the boll weevil of the Southeastern United States; the 



