76 



equally toxic to the tobacco budworm at 0.05 percent. Cela S-2957, Chevron 

 RE-12420, Chevron RE-13913, Hercules A-16434, Sumitomo K-9, Sumitomo S -A084 

 and Vero Beach Bay 88941 were equally or more toxic against the fall armyworm 

 than methyl parathion at 0.01 percent sprays. Chevron RE-11776, DuPont 1410, 

 3M MBR-6168, Monsanto 856, Sumitomo S-4084, Upjohn V-34013 and Mobam were more 

 toxic to the boll weevil than azinphosmethyl at 0.25 percent. Cela K-673, Cela 

 S-2957, Chevron RE-12420, Chevron RE-13913, DuPont 1410, Hercules A-16434, 

 Hercules 18009, Hercules 18010, Sandoz 52092, Sandoz 52097, Sandoz 52114, Sandoz 

 52117, Sandoz 52118, Stauffer R-16374-B, Stauffer R-15206, Stauffer R-15644, 

 and Vero Beach Bay 88941 w^ere more toxic to the two-spotted spider mite than 

 malathion at 0.01 percent. Hercules 17414, Sandoz 52097, Sandoz 52114, Sandoz 

 52117 and Stauffer R-16374-B were more toxic as a systemic against this mite 

 than dsmeton at 1 part per million. In topical application tests, the greatest 

 LDcQ obtained with methyl parathion against tobacco budworm larvae from a 

 Brownsville, Texas field culture was 16X greater in 1970 than in 1969. 



138. , and Wolfenbarger, D. A. 1973. Effectiveness of experimental 



insecticides against the tobacco budworm, boll weevil, fall armyworm 

 and two-spotted spider mite. Tex. Agric. Exp. Stn. Dep. Entomol. Tech. 

 Rep. 73-20, pp. 26-31. 

 Sprays (0.05 percent concentration) of methyl parathion. Shell SD-24073, and 

 SD-24905 were about equally toxic to the tobacco budworm. Sprays (0.01 per- 

 cent of Cela S-2956, Shell SD-24052, SD-24073, SD-24074, SD-24905, and SD- 

 25735 were equally or more toxic to the fall armyworm than an equivalent 

 spray of methyl parathion. Sprays (0.25 percent wt/v) of Cela S-2956 and 

 Mobil MC-3815 were more toxic to boll weevils than an equivalent spray of 

 azinphosmethyl. Sprays (0.01 percent) of Ansul AN-57000 and AN-57003; Cela 

 S-2956; Ciba C-17475; Hercules 16801 and 20656; Mobil MC-3427, MC03470, MC- 



