effected good immediate kill of boll weevils but did not always prevent exces- 

 sive weevil damage when applied at the customary 5- day inter val. Chlorinated 

 hydrocarbon materials varied considerably in relative effectiveness at the 

 various locations but were generally the least effective of the insecticides 

 used. All insecticides except Sevin were combined with DDT for bollworm 

 control. 



1960 - Walker, J. K., Jr., and R. L. Hanna. Development of populations of the boll weevil 

 in cotton fields treated with various insecticides during 1959. Tex. Agr. Expt. 

 Sta. Prog. Rpt. 2152. Aug. 30. 



Seasonal records of boll weevil populations, cotton fruiting, and weevil dam- 

 age were obtained on a number of small fields which were treated with various 

 insecticides during 1959 in the same locality at College Station. Well-timed ap- 

 plications of 0.5 lb. per acre of methyl parathion and 0.25 lb. of methyl parathion 

 plus 1.5 lbs. of toxaphene reduced overwintered populations to such a degree that 

 boll weevils did not become a serious late-season problem. Sevin at 0.5 lb. was 

 not enough to control the boll weevils, but 1.25 lbs. per acre was effective for 

 late-season control. Kill of overwintered weevils with 2.0 lbs. of toxaphene-DDT 

 (2-1) was poor, but full season control with this material prevented serious dam- 

 age. Toxaphene and Strobane used without DDT were ineffective. 



I960 - Walker, J. K., Jr., and R. L. Hanna. Companion of toxaphene and strobane as 

 dusts, sprays, and sprays with DDT for boll weevil and bollworm control. Tex. 

 Agr. Expt. Sta. Prog. Rpt. 2147. July 6. 



A replicated small plot test did not reveal any differences in effectiveness 

 between toxaphene and strobane. The spray combinations with DDT were much 

 more effective for boll weevil than the 2 materials used alone. Yield differences 

 were not significant and no important differences in quality of lint or seed, due to 

 different levels of infestation, were shown. 



CONTROL - CULTURAL 



1896 - Howard, L. O. The Mexican cotton boll weevil. U. S. D. A., Bur. Ent. C. 14(2): 



8, fig. 1-5. 



While styled a revision of C. 6, this circular contains additional information 

 relative to distribution, natural history, habits, and natural enemies and parasites, 

 now worked out with substantial accuracy, incorporating the results of field 

 studies by E. A. Schwarz, Mr. Townsend, and the author of the circular. 



Under the head of remedies is the first suggestion of the great importance 

 of the cultural method of control, and especially the early fall destruction of the 

 cotton plants, together with the recommendation of early planting and clean culti- 

 vation. Trapping late beetles in fall and over-wintered beetles early in spring are 

 advised, together with the destruction of volunteer plants, the region infested up 

 to this time being fairly within the range of volunteer or seppa cotton. 



1897 - Anderson, J. D. After the boll weevil. Texas Stockman & Farmer 17(9):4. Dec. 8. 



Results of a meeting of farmers in Cuero, Tex. As a preventive against boll 

 weevil loss, the burning of the cotton stalks and trash in fields was recommended. 

 Certain "useless" proceedings were also recommended, such as use of light traps 

 and poisoning with various substances. 



1901 - Balestrier, L. de. Contra el picudo. El Progreso de Mexico, 8:481-482, May 22: 

 497-498, May 30:531-532. June 15:545-546. June 22. 



Discusses traps, collection of squares, burying of squares, rates of develop- 

 ment of weevils, early maturing cotton, occurrence of weevils in cotton seed, 

 destruction of stalks by burning and grazing, spread of the weevil, difficulties in 

 the application of cultural methods and their value are emphasized. 



