/ 



336 



65A. , and Taft, H. M. 1966. Host-plant selection by migrating boll 



weevils. J. Econ. Entoraol. 59: 390-392. 

 Field experiments were conducted at Florence, S.C, in 1963 and 1964 to study 

 the roles of odor and color in selection of host plants by the boll weevil, 

 Anthonomus grandis Boheman. Periodic removal of all or part of the fruiting 

 forms from cotton plants did not reduce their attractiveness to this insect. 

 Moreover, boll weevils were attracted to fruiting cotton plants in signifi- 

 cantly larger numbers than to cocklebur plants of similar size and color, or 

 to green- or red- painted plastic forms, indicating that under the conditions 

 of the tests the primary attractant of cotton plants to the insect is odor. 



655. , and Taft, H. M. 1966. Starvation method for obtaining diapausing 

 boll weevils able to survive the winter in hibernation. J. Econ. Entomol. 

 59: 55-57. 



Fall field-collected boll weevils, Anthonomus grandis Boheman, were separated 

 into diapausing and nondiapausing groups by withholding food for 1 to 3 weeks. 

 All nondiapausing weevils died during the starvation period. Records indicated 

 that weevils may not require large amounts of fat for winter survival. 



656. Mitchell, H. C. 1971. Behavior study of-«©verwintered boll weevils 

 *—etuplcying radioactive tags. Diss. Abstr. Int. B. 32: 2212B. 



Boll weevils, Anthonomus grandis Boheman, were successfully tagged using Zn 

 in the form of zlrtr oxide placed in butyrata dope and painted on the elytra of 

 the insect. A small syringe placed on an electric micro-applicator located 

 behind lead bricks was used in tagging the individual weevils at the tip of a no. 

 22 needle. Weevils which have approximately 100 uc of the isotope applied can 

 be detected 76 to 91 cm away by using a solid 1 in. x 1 in. Nal scintillation 

 probe. 



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