255 



quail, Coturnlx coturnix japonlca (Teininek & Schlegel), to assess the effects 

 of the toxicity of busulfan ingested, chemosterilized weevils on certain species 

 of wildlife. The acute toxicity of busulfan to quail chicks at age 1 week was 

 162.7 mg/kg. Toxicity for males and females at age 8 weeks was 160.3 and 174.3 

 ros/l^g* respectively. Gland weights of testes and ovaries were affected at LDc^ 

 or at a higher dose. Quail chicks were fed chemosterilized weevils. Eggs of 

 these quail and their offspring were analyzed for egg production, fertility, 

 hatchability, shell thickness, abdomen, and yolk contents. Chemosterilized 

 weevils had no significant effect on the reproductive performance of Coturnix 

 quail. 



487. Lacewell, R. D.; Bottrell, D. G.; Billingsley, R. V.; Rummel, D. R.; and 

 Larson, J. L. 1974. Impact of the Texas High Plains diapause boll weevil 

 control program. Tex. Agric. Exp. Stn. Misc. Publ. MP-1165, 16 pp. 

 Cotton producers on the Texas High Plains in cooperation with the U.S. Depart- 

 ment of Agriculture have been carrying out an area-wide boll weevil suppression 

 program. The purpose of the program has been to prevent the boll weevil from 

 becoming established on the Texas High Plains. With ^he program in effect, 

 an estimated 2.2 million pounds of insecticide are applied annually to cotton 

 on the High Plains and the Rolling Plains. Based on 1969, 1970 and 1971 sta- 

 tistics, about 1.7 million bales were produced annually. With the suppression 

 program discontinued, it was estimated that insecticide use would increase be- 

 tween 8 and 20 million pounds annually, cotton output would decline between 

 75,000 and 125,000 bales and total production costs would increase between 

 $12 and $20 million over the total area (High Plains and Rolling Plains). The 

 estimated increase in insecticides applied was primarily because producers 

 would use toxaphene and methyl parathion to control boll weevils that establish 



