446 



detection tool; traps must be combined with other techniques when used in an 

 integrated control program. 



874. ; Hopkins, A. R.; and Agee, H. R. 1969. Response of overwintered boll 

 weevils to reflected light, odor, and electromagnetic radiation. J. 

 Econ. Entomol. 62: 419-424. 



Overwintered adult Anthonomus grandis Boheman were studied to determine how 

 they locate cotton when they leave hibernation sites. Attractant stimuli that 

 might be produced by cotton that were examined were light, odor, or electrostatic 

 field. The numbers of weevils responding to the stimuli indicated that weevils 

 distinguish colors and respond in significantly greater numbers to wavelengths 

 of light in the blue-green region (500-525 nanometers) than in others. They 

 were not attracted by light in the red region of the spectrum (600-650 nanometers) 

 or by the odor of cotton or cocklebur plants. There was an indication in 1 

 experiment that the weevils could detect differences between grounded and 

 ungrounded plants. 



875. ; Hopkins, A. R. ; James, W.; and Moore, R. F., Jr. 1973. Boll weevils: 

 time of entry into hibernation sites and variations in survival and 

 emergence. J. Econ. Entomol. 66: 254-256. 



A method of determining the time of entry of boll weevils, Anthonomus grandis 

 Boheman into hibernation sites was devised. No relationship was found between 

 the time weevils entered hibernation sites in the fall and the time they emerged 

 in the spring. Surviving weevils lived from 4 to 127 days but the means from 

 the 8 entry dates were not significantly different. 



876. ; Hopkins, A. R.; Jernigan, C. E.; and Webb, J. C. 1969. A new 8-row 

 ground sprayer with auxiliary air for ULV application of pesticides to 

 cotton. J. Econ. Entomol. 62: 570-574. 



A ground sprayer that uses the principle of the air blast to deliver ultra low 



/■ 



