419 



resulted in very light honey stores. Consequently, there was a 35 percent over- 

 wintering: loss of hives In the eradication area. Exposure to pesticides caused 

 a loss in worker bees, especially the field force. This caused an immediate re- 

 duction in honey production which led to overwintering losses. Heavy bee kills 

 also made the colony more susceptible to natural enemies of the honey bee, espe- 

 cially to the wax moth, Galleria mellonella (L.). 



822. Singh, I. D., and Weaver, J. B., Jr. 1972. Growth and infestation of 

 boll weevils on normal-glanded, glandless, and high-gossypol strains 

 of cotton. J. Econ. Entomol. 65: 821-824. 



Field> cage, and laboratory tests with normal-glanded, glandless, and high- 

 gossypol strains of cotton, Gossypium hirsutum L., showed that Anthonomus 

 grandis Boheman preferred glandless or normal-glanded cotton to high-gossypol 

 cotton for feeding and oviposition. Boll weevils that emerged from punctured 

 squares of high-gossypol strains were smaller than those emerging from 

 squares of normal-glanded and glandless cotton. Results of this study 

 suggest that boll weevils show nonpreference for strains of cotton containing 

 a high level of gossypol in squares. 



823. Slatten, B. H., and Larson, A. D. 1967. Mechanism of pathogenicity 

 of Serratia narcescens . 1. Virulence for the adult boll weevil. J. 

 Invert«br. Pathol. 9: 78-81. 



The LDcn of the bacterium, Serratia marcescens , for the adult boll weevil, 

 Anthonomus grandis , was 5.1 ± 1 organisms per weevil by intrahemocoelic 

 inoculation. Ingestion of grossly contaminated food also infected the 

 weevils . 



\ ■ ■ -— -^ 



