Tepa was the only chloroform-soluble metab- 

 olite of thiotepa recovered from the insects. 

 The amount of thiotepa decreased with time 

 after treatment in all insects except the boll 

 weevil. 



147. Parker, R. E., and others. Effective- 

 ness of a USDA-developed middle flamer on boll 

 weevil {Anthonomus grandis) destruction in- 

 side cotton squares. U.S. Agr. Res. Serv. ARS 

 42-104, 12 pp. 1964. 



E. C. Burt, F. E. Fulgham, and M. E. Merkl, 

 joint authors. 



Once-a-week flame applications with a hooded 

 burner satisfactorily controls weeds in the mid- 

 dle of cotton rows at a cost of 20 to 40 cents 

 per acre per application. 



From results of controlled tests it was con- 

 cluded that boll weevils inside fallen cotton 

 squares can be reduced by approximately two- 

 thirds by flaming the squares with a standard 

 hooded burner traveling at a speed of one- 

 fourth mile per hour. With the hood extended 

 to 34 inches the same results were obtained at 

 one-half mile per hour. 



From results it is theorized that lethal tem- 

 peratures of boll weevils depend upon the boll 

 weevil's stage of development. 



148. Pfrimmer, T. R., and Merkl, M. E. 

 Field insecticide tests against several cotton 

 pests. Jour. Econ. Ent. 55 : 121-124. 1962. 



Tests were made against the thrip, tarnished 

 plant bug, boll weevil, bollworm, and spider 

 mite. Geigy 30494, Methyl Trithion, Trithion, 

 Sevin wettable powder, and mixtures of DDT 

 with endrin, toxaphene, methyl parathion, 

 Strobane, or Guthion all gave good control of 

 the boll weevil and the bollworm. 



149. Rexjhen, P. L., Sankaran, T., and 

 Atri, S. P. Mexican cotton boll weevil and 

 measures to prevent its entry into India. In- 

 dian Cotton Growing Rev. 16: 319-323. 1962. 



India must guard against bringing the boll 

 weevil into the country with the large quantity 

 of raw cotton imported from the United States. 



A life cycle of the boll weevil and a resume 

 of pesticide acts and quarantine measures are 

 given. Unginned cotton may not be imported. 

 Restrictions are put on importation of ginned 

 cotton. Fumigation of imported cotton is com- 

 pulsory. 



150. Ridgway, R. L., and Gorzycki, L. J. 

 Evaluation of some experimental phosphorus 

 and carbamate compounds as systemic insecti- 

 cides. U.S. Agr. Res. Serv. ARS 33-106, 6 pp. 

 1965. 



Five experimental compounds, Bayer 30237, 

 Bayer 30554, CL-47031, NIA-10242, and UC- 

 21149, were evaluated as systemic insecticides 

 against the boll weevil, cotton aphid, and car- 

 mine spider mite in the laboratory, greenhouse, 

 and field. When all methods of application were 

 considered, UC-21149 and CL-47031 were the 

 most promising against these pests. UC-21149 



was slightly better than CL-47031 under field 

 conditions. 



151. Ridgway, R. L., Gorzycki, L. J., and 

 Lindquist, D. A. Evaluation of systemic in- 

 secticides for cotton insect control. Jour. 

 Econ. Ent. 58: 666-669. 1965. 



Four experimental systemic insecticides, 

 American Cyanamid compounds CL-47031, 

 CL-47470, CL-43064, and E. I. 47772, were 

 compared in one or more tests with phorate, 

 Di-Syston, Bidrin, phosphamidon, demeton, 

 methyl parathion, and Guthion-Ethyl Guthion 

 for cotton insect control. When applied in or 

 near the seed furrow, as sidedressings to estab- 

 lished plants, directly to the stem, or as foliar 

 sprays, one or more of the experimental com- 

 pounds was equal or superior to currently 

 available compounds. The insects used for bio- 

 logical evaluation included the boll weevil. 



152. Ridgway, R. L., Jones, S. L., and 

 Lindquist, D. A. Effect of American cyana- 

 mid CL-47031 on fecundity and longevity of 

 the boll weevil. Jour. Econ. Ent. 58: 790-791. 

 1965. 



American Cyanamid experimental insecti- 

 cide CL-47031 (cyclic ethylene (diethoxyphos- 

 phinyl) dithioimidocarbonate) and two other 

 organophosphorus insecticides fed to the boll 

 weevil greatly reduced egg production. Low 

 levels of CL-47031 fed to boll weevils also pro- 

 duced high mortalities. 



153. Ridgway, R. L., Lindquist, D. A., and 

 Bull, D. L. Effect of method of application 

 on uptake of Di-Syston by the cotton plant. 

 Jour. Econ. Ent. 58: 349-352. 1965. 



P 32 labeled Di-Syston was applied to the soil 

 with and without irrigation and at several lo- 

 cations in relation to the cotton plant. Results 

 indicated that irrigation, deep placement, and 

 sidedressing on both sides instead of on one 

 side of the drill row increased uptake. Radio- 

 assay of different parts of the cotton plant after 

 applications were made to the soil indicated 

 that greater quantities of radioactivity accu- 

 mulated in the leaves than elsewhere. After 

 application to the stem, Di-Syston did not 

 translocate to other parts of the plant to the 

 extent reported for some other systemic insec- 

 ticides. Laboratory-reared insects, including boll 

 weevils, were used for bioassays. 



Studies indicated that stem treatments with 

 the more water-soluble metabolites of Di-Syston 

 were more effective against the boll weevil than 

 the less soluble Di-Syston. 



154. Shipp, O. E., and Brazzel, J. R. Dis- 

 tribution of C 14 labeled dieldrin in dieldrin- 

 resistant and susceptible boll weevils, Anthon- 

 omus grandis. Jour. Econ. Ent. 57: 174-175. 

 1964. 



The relation of total fat content of an insect- 

 body part to the distribution of topically ap- 

 plied C 14 labeled dieldrin in the boll weevil was 

 studied. Results revealed no apparent relation 



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