/ 



428 



control for this group of insects, prior to the development of resistant types, 

 has been through use of chemicals. Marked progress has been achieved in develop- 

 ing commerically useful host-resistance to this group of insects with the 

 exception of the cotton bollworm and boll weevil. Even here types differing 

 in various components of resistance have been identified but the combination 

 of these characteristics into an acceptable commercial variety remains to be 

 accomplished. Increased emphasis is being placed on host-plant resistance. 

 Success in such efforts requires the close cooperation of entomologists, 

 geneticists, and breeders. 



839. Sprott, J. M.; Lacewell, R. D.; Niles, G. A.; Walker, J. K.; and 



Gannaway, J. R. 1976. Agronomic, economic, energy and environment impli- 

 cations of short-season, narrow-row cotton production. Tex. Agric. Exp. 

 Stn. Misc. Publ. MP-1250C, 23 pp. 

 The agronomic, environmental, energy use and economic implications of narrow-row, 

 short-season cotton production were evaluated, based on data from a study con- 

 ducted in Frio County, Texas in 1974. Short-season, narrow-row cotton produc- 

 tion reduced the energy use per acre from 3,624,453 kcal to 2,445,378 kcal, or 

 a savings of 33 percent. More dramatically, the kcal required per pound of lint 

 declined from 7,249 kcal to 3, 197 kcal, -ftr a savings of 56 percent. This pro- 

 «-4«ctiGn technique also required 26 percent fewer pounds of active ingredients in 

 insecticides and herbicides per acre. Economic evaluations indicated a potential 

 savings in cost per pound of lint of 43 percent, from 47.6(;:/lb. under "typical" 

 Frio County production techniques to 26.9c/lb. using the narrow-row, short- 

 season technique. Overall, a short-season system is in harmony with environ- 

 mental and energy use goals, in addition to being attractive to the producer. 

 Consumers ultimately should benefit through reduced retail price of cotton 

 fibers, in addition to the environmental protection afforded by the narrow- 

 row, short-season cotton production technique. 



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