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1943 - Young, M. T., G. L. Garrison, and R. C. Gaines. Calcium arsenate with and with- 



out cube and nicotine for control of the boll weevil and the cotton aphid at Tal- 

 lulah, Louisiana, in 1942. J. Econ. Ent. 36(6):901 -903. 



Two experiments indicate that poisoning with calcium arsenate for a light 

 boll weevil infestation may result in reduced yield unless an aphicide is also 

 used. 



1944 - Annand, P. N., and others. Tests conducted by the Bureau of Entomology and 



Plant Quarantine to appraise the usefulness of DDT as an insecticide. J. Econ. 

 Ent. 37(1):125-159. 



(Ivy, E. E. - p. 142) A 2% DDT dust at a rate of 32 lbs. per acre, in the 

 laboratory, was completely ineffective against Anthonomus grandis Boh. 



1944 - Fife, L. C. Reduced dosages of calcium arsenate and cryolite for control of the 

 boll weevil and their effect on the cotton aphid. J. Econ. Ent. 37(1):19-21. 



The results are given of experiments in Texas in 1942 to determine the ef- 

 fect of reducing dosages of calcium arsenate and cryolite on the control of 

 Anthonomus grandis Boh. and on Aphis gossypii Glov. The tests were made in 

 fields planted about a month later than usual, and a general migration of the 

 weevil from early to late fields began on 15th July, after which infestation 

 rapidly increased in all plots, remaining high throughout the remainder of the 

 season. 



Only plots treated with calcium arsenate alone and with sulphur (1:2) showed 

 significant reductions in infestation by A. grandis. 



1944 - Gaines, J. C. Insecticide tests for bollworm control. J. Econ. Ent. 37(6):723- 

 727. 



Calcium arsenate proved profitable against the bollworm, but not as profit- 

 able as some of the other insecticides. Cryolite was effective against bollworms, 

 but yields were reduced when weevils occurred in injurious numbers. The smaller 

 yields were attributed to poor weevil control. 



Lead arsenate was more effective against weevils than cryolite and more 

 effective against the bollworms than calcium arsenate. When this poison was used 

 for both weevil and bollworm control, particularly if the latter were injurious, 

 yields were higher than when either of the other materials was used exclusively. 



In 1942, basic copper arsenate proved to be the most effective against boll- 

 worms of any of the insecticides included in the experiments. The high yields 

 resulting from the use of this insecticide appeared to be partially due to the 

 presence of copper. 



The two treatments resulting in highest gains were basic copper arsenate 

 and alternate applications of calcium arsenate with lead arsenate in a schedule 

 of applications for weevil and bollworm control. 



1944 - Ivy, E. E. Tests with DDT on the more important cotton insects. J. Econ. Ent. 

 37(1):142. 



A 2% DDT-pyrophyllite dust was comparatively ineffective against Alabama 

 agrillacea Hbn. (35.5% kill) and Anthonomus grandis Boh. (18.5% kill) when ap- 

 plied at the rate of 32 lbs. per acre and had little effect on Aphis gossypii Glov. 

 (15.4% mortality) in laboratory tests in which nicotine dusts (2%) gave 81% mor- 

 tality. 



1944 - Smith, G. L. Tests with DDT against the boll weevil. J. Econ. Ent. 37(1): 144. 



Pyrophyllite dusts containing 1% and 2% DDT, applied to caged cotton plants 

 infested with adults of Anthonomus grandis Boh. during July and August, both 

 gave 16% net mortality after 96 hours, as compared with 77% when calcium ar- 

 senate was used. 



1945 - Bondy, F. F., and C. F. Rainwater. Cotton insects investigations. S.C. Agr. Expt. 



Sta. 1943-1944 Rpt. 57:99-104. Clemson. 



Basic copper arsenate was as effective as calcium arsenate against the 

 weevil. Lead arsenate, magnesium arsenate, potassium fluosilicate, barium fluo- 

 silicate, and synthetic cryolite were less so. 



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