1954 - Fenton, F. A., J. R. Dogger, and G. A. Bieberdorf. Boll weevil and bollworm 

 control with insecticides. Okla. Agr. Expt. Sta. B. B-441, 22 p. Nov. 



Five years' results with 14 insecticides were evaluated as sprays or dusts. 

 There was no difference in effectiveness between sprays or dusts. 



1954 - Fife, E. C, and R. L. Walker. Comparative effectiveness of various phosphorus 

 and chlorinated hydrocarbon insecticides for control of cotton pests. J. Econ. 

 Ent. 47(5):803-807. 



Several phosphorus compounds and chlorinated hydrocarbon insecticides 

 were tested against the boll weevil, Anthonomus grandis Boh., the cotton aphid, 

 Aphis gossypii Glov., the cotton leafworm, Alabama argillacea (Hbn.), the desert 

 spider mite, Tetranychus desertorum Banks, and the two-spotted spider mite, 

 T. bimaculatus Harvey, at Florence, S.C., in 1953. 



The new insecticides, methyl parathion, chlorthion, EPN, endrin, isodrin, 

 and Strobane were compared with the recommended insecticides BHC, heptachlor, 

 toxaphene, aldrin, and dieldrin. 



Methyl parathion applied at 0.25 pound or more per acre, both in a dust or 

 spray, and a 2.5 percent chlorthion dust gave satisfactory control of the over- 

 wintering brood of boll weevils but were less effective against the summer broods 

 than the standard insecticides applied at the recommended rates. 



At 0.35 and 0.5 pound per acre chlorthion in a dust, and methyl parathion, in 

 both dusts and sprays, usually gave good seasonal control of the boll weevil. 



In 2 out of 3 experiments, yields were lower in the chlorthion-treated plots, 

 regardless of the dosage used, than in plots treated with the chlorinated hydro- 

 carbon insecticides. 



The results with EPN were somewhat erratic; at 0.5 pound per acre, in both 

 a dust and spray, it was effective against the overwintering brood of boll weevils 

 but against the summer-brood weevils the results were not consistent. 



Strobane at 2 pounds per acre gave effective seasonal control of the boll 

 weevil. In 2 experiments the addition of DDT to Strobane increased the effective- 

 ness of the treatment. 



Endrin gave good seasonal boll weevil control at 0.2 pound per acre, and at 

 0.3 pound it was outstanding. 



Isodrin compared favorably with endrin at the same dosage level for boll 

 weevil control. 



1954 - Hanna, R. L. Application schedules for control of cotton insects. J. Econ. Ent. 

 47(6):1 129-1 131. 



Small-plot test of factorial design conducted to evaluate early-season and 

 late-season application schedules for cotton insect control showed a significantly 

 lower population of thrips and a higher yield as a result of 3 early-season appli- 

 cations of insecticide. Seven late -season applications at 5 -day intervals resulted 

 in significantly higher yield than 5 late-season applications at 7-day intervals. 

 A replicated large-plot test designed to test the relative effectiveness of 1, 2, and 

 3 early-season applications of insecticides showed a significant reduction of 

 numbers of thrips due to 3 early-season applications of insecticides but no appre- 

 ciable increase in yield. 



1954 - Ivy, E. E., A. L. Scales, and L. J. Gorzycki. Three new phosphate insecticides 

 for the systemic control of cotton insects. J. Econ. Ent. 47(6): 1 148- 1 149. 



Three compounds, TM 12008, TM 12009, and TM 12013, were applied to cot- 

 ton seed at the rate of 4 pounds per 100 pounds of seed. Results of tests against 

 the boll weevil and the cotton leafworm are presented. Each compound was highly 

 effective on seedlings infested 1 week after treatment, but TM 12008 (0,0-diethyl 

 S-isopropyl mere apt om ethyl dithiophosphate) retained its toxicity for the longest 

 time. 



1954 - Merkl, M. E., and E. W. Dunnam. Tests against cotton pests with some new dust 

 and spray formulations. J. Econ. Ent. 47(5):869-871. 



At Stoneville, Miss., several organic insecticides formulated with a new 

 chemically treated calcium carbonate had excellent dusting qualities and gave 



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