489 



1976 season. The new trap retains several advantages of the widely used 

 Leggett trap, but operates on an entirely different principle and shows pro- 

 mise of being more efficiency in capturing boll weevils. A modified version 

 of the Leggett trap also was tested and proved superior to the standard Leggett 

 design. 



966. Whitten, C. J., and Bull, D. L. 1978. In vivo effect of a juvenile hor- 

 mone analogue on the nonspecific esterases of the boll weevil. Southwest. 

 Entomol. 3: 226-231. 



Topical applications of a juvenile hormone analogue (Zoecon 1330-193A, (E^.E^)- 

 9-(3,3-dimethyloxiranyl)-N,N-diethyl-3, 7-diraethyl-2, 6-nonadienamide) to newly 

 formed pupae of the boll weevil, Anthonomus grandis Boheman, resulted in integu- 

 mental defects of varying degrees in a proportion of the insects. Quantitative 

 and qualitative comparisons of the nonspecific esterase and crude protein com- 

 positions among treated and untreated insects revealed differences between 

 categories of treated inc^ects and between treated and untreated insects. The 

 greater the severity of the disruption of the normal metamorphical processes 

 among the treated insects, the greater was the deviation of biochemical pro- 

 perties from that of the untreated insects. 



967. Whitten, M. T., and Foster, G. G. 1975. Genetical methods of pest control. 

 Annu. Rev. Entomol. 20: 461-476. 



Current status of the sterile insect release method including the scre^vworm, 

 coldling moth and boll weevil is discussed. 



968. Widemann, H. T.; Slosser, J. E.; and Cross, B. T. 1979. Tree uprooting 

 with a low-energy grubber for shelterbelt thinning. Trans. ASAE 22: 

 1275-1279. 



A small crawler tractor with a hydraulic-activated root-cutting blade uprooted 

 large trees very effectively. In trees with a mean trunk diameter of 26 cm 



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