1954 - Young, M. T., and R. C. Gaines. Control of insects and spider mites on cotton 



in 1953. Assoc. So. Agr. Workers Proc., 51:94. 



Calcium arsenate, various organic insecticides, and mixtures of these 

 materials were tested in l/10-acre plots at Tallulah, La., in 1953 for control 

 of the boll weevil, the bollworm, the cotton aphid, the cotton fleahopper, and 2 

 species of spider mites. All mixtures containing either BHC, heptachlor, aldrin, 

 dieldrin, methyl parathion, and chlorthion plus DDT applied either as dusts or 

 sprays satisfactorily controlled the boll weevil, cotton aphid, bollworm, and the 

 cotton fleahopper. Metacide spray controlled the boll weevil but when used as a 

 2% dust was not very effective. Dusts with Strobane 20%, toxaphene 20%, toxa- 

 phene 20% plus sulfur 20%, 3-5-40 alternated with calcium arsenate, and endrin 

 spray satisfactorily controlled the boll weevil, bollworm, and the cotton flea- 

 hopper. 



1955 - Dogger, James R. Solutions of insecticides in an isoparaffinic oil for cotton in- 



sect control. J. Econ. Ent. 48(4):422-424. 



An oil known as HFA No. 1, or Soltrol 180, was not phytotoxic to cotton when 

 applied in the field at rates up to 7.5 gallons per acre. Insofar as cotton insect 

 control was concerned, no decrease in effectiveness of dieldrin-DDT, endrin, and 

 heptachlor was evident when they were applied in a solution of this oil. Rates of 

 application for oil solutions of 2 to 4 gallons per acre appeared to be effective on 

 cotton under Oklahoma conditions. 



While the oil itself proved nonphytotoxic, solutions of the various insecti- 

 cides in the oil had various detrimental effects on the plants. Toxaphene in HFA 

 No. 1 solution, at rates normally applied under field conditions, was highly injuri- 

 ous to cotton plants. Heptachlor in the oil solution caused moderate injury to 

 young cotton plants from which they were able to recover. Older plants showed 

 less injury when sprayed at practical field rates. 



Aldrin, dieldrin plus DDT, and endrin in HFA No. 1 solutions were nonphy- 

 totoxic to cotton at practical rates of application. 



1955 - Ivy, E. E., J. R. Brazzel, A. E. Scales, and D. F. Martin. Two new phosphate 

 insecticides for cotton insect control. J. Econ. Ent. 48(3):293-295. 



Bayer 17147, a benzotriazine derivative of a methyl dithiophosphate, ap- 

 peared promising in laboratory tests against the boll weevil, cotton aphid, spider 

 mite, bollworm, cotton leafworm, brown cotton leafworm, flower thrips, cotton 

 fleahopper, and pink bollworm. 



Bayer 16259, a benzotriazine derivative of an ethyl dithiophosphate, in labo- 

 ratory tests was more effective than 17147 against the salt-marsh caterpillar, 

 cotton aphid, and spider mite, but was less effective against the boll weevil. 



The residual toxicity of Bayer 17147 was greater than that of toxaphene. 



1955 - McGarr, R. E. Weekly applications of insecticides for control of the pink boll- 

 worm and the boll weevil. J. Econ. Ent. 48(l):95-96. 



Tests near San Benito, Tex., consisted of 4 series of spray tests. DDT was 

 used with endrin, methyl parathion, heptachlor, BHC, chlorthion, and a mixture 

 of endrin and methyl parathion. Demeton was also used in some tests. Although 

 boll weevils were light in 2 of the series, the DDT-endrin and endrin-methyl 

 parathion mixtures seemed promising. 



A single large-scale test was conducted at San Fernando, Mex,, in which 

 endrin was compared with a mixture of dieldrin, DDT, and parathion. Eight appli- 

 cations were made at weekly intervals using emulsifiable concentrates. Both 

 treatments gave very good control of the boll weevil and good yield increases 

 under rather severe conditions. 



1955 - Robertson, R. E., and F. S. Arant. Effect of Bayer 17147 on boll weevil. J. Econ. 

 Ent. 48(5):604-605. 



Experiments were conducted to determine the effect of Bayer 17147 on adults 

 of the boll weevil. Five percent Bayer 17147 and 20% toxaphene were applied to 

 foliage of cotton in the field as dusts at the rates of 10 and 20 pounds per acre. 



67 



