289 



551. McCoy, J. R. 1975. Phenotypic deviants in the ebony genotype in the boll 

 weevil. J. Econ. Entomol. 68: 775-776. 



Three pheno-deviations of the ebony genotype isolated from a reproducing field 

 population of ebony boll weevils, Anthonomus grandis Boheman, were described. 

 Studies of the F, , F , and backcross progenies indicated that these deviations 

 are not genetically controlled but rather the result of variable expressively 

 of the ebony genotype. 



552. . 1979. High- insert: a dominant mutant in the boll weevil with 

 recessive lethal effect. J. Hered. 70: 349-350. 



An autosomal, dominant lethal mutant of the boll weevil, high- insert, is der*- 

 scribed. This mutation is characterized phenotypically by having the antennal 

 Insertion much nearer the eyes than normal. Matings between high-insert and 

 nonmutants result in a 1:1 mutant-nonmutant ratio, and mutant /mutant matings 

 yielded a 2:1 mutant-nonmutant ratio. In addition more than one-half of the 

 mutant females failed to oviposit. 



553. , and Lloyd, E. P. 1975. Evaluation of airflow systems for the col- 

 lection of boll weevils from cotton. J. Econ. Entomol. 68: 49-52. 



To develop a more rapid and efficient mechanical method of detecting low 

 level infestations of Anthonomus grandis Boheman, 4 mechanical collection 

 systems were compared with visual observation of adult boll weevils in cotton. 

 The McCoy Insect Collector (a dual directional blower and vacuum system) was 

 the most efficient system and had an efficiency of 130% compared with visual 

 detection. Field tests indicate that ca. 10% of the oviposition damaged squares 

 on the plants as well as adult weevils will be collected with the mechanical 

 sampling device. The McCoy Insect Collector is capable of detecting the pre- 

 sence of 2 adult weevils in 10 acres of cotton whether by collection of the 

 weeviis or by collection of infested squares. 



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