tent of cotton plants to insect resistance. Jour. 

 Econ. Ent. 57 : 283-285. 1964. 



In field and greenhouse tests, glandless ex- 

 perimental cotton strain 30-8 was eaten in 

 preference to either glanded Acala or Pima 

 varieties by beet armyworms, bollworms, a 

 black fleahopper, grape colaspis, cutworms, pill- 

 bugs, and rodents. The toxic effect of gossypol 

 was demonstrated in spray tests against cotton 

 aphids, lygusbugs, salt-marsh caterpillars, and 

 thurberia weevils and in tests with bollworms 

 reared on media containing gossypol. Chemical 

 analyses showed roughly three and four and 

 one-half times more gossypol in glanded Acala 

 4-42-77 seedlings and leaves, respectively, than 

 in comparable samples of glandless 4-42-77. 



15. Boyer, W. P., Warren, L. 0., and Lin- 

 coln, C. Cotton insect scouting in Arkansas. 

 Ark. Agr. Expt. Sta. Bui. 656, 40 pp. 1962. 



History of the boll weevil and of the scouting 

 program in Arkansas is given. Techniques of 

 scouting for the boll weevil, bollworm eggs and 

 larvae, aphids, plant bugs, and spider mites 

 and methods of recording and reporting results 

 are described. Tables and graphs show the re- 

 sults of the scouting program. 



16. Brady, U. E., Jr., and Arthur, B. W. 

 Metabolism of 0,0-dimethyl 0-[4-(methylthio)- 

 m-toly-] phosphorothioate by white rats. Jour. 

 Econ. Ent. 54: 1232-1236. 1961. 



Metabolism of the P 32 labeled insecticide 

 was studied in the house fly, German cock- 

 roach, and the boll weevil. The house fly ab- 

 sorbed the chemical more readily at 4 hours 

 than did the other two insects. The boll weevil 

 hydrolyzed a greater percentage of the ab- 

 sorbed dose than did the other two. Data are 

 given also for investigations with the insecti- 

 cide in white rats and in the cotton plant. 



17. Brady, U. E., Jr., and Arthur, B. W. 

 Absorption and metabolism of Ruelene by 

 arthropods. Jour. Econ. Ent. 55: 833-836. 

 1962. 



The absorption and metabolism of P 32 labeled 

 Ruelene was studied in 16 species of arthropods. 

 The house fly, stable fly, yellow meal worm, and 

 American cockroach absorbed greater than 80 

 percent of the topically applied dose by 24 

 hours after treatment, whereas the boll weevil, 

 Gulf Coast tick, and brown dog tick absorbed 

 less than 25 percent of the applied dose. 



18. Brady, U. E., Jr., Rawson, J. W., and 

 Arthur, B. W. Systemic effectiveness of in- 

 secticides against boll weevil larvae and other 

 cotton pests. Jour. Econ. Ent. 56: 74-76. 

 1963. 



Bayer 31757, Bayer 30749, Gen.Chem. 3583, 

 and Gen.Chem. 4072 applied to the foliage of 

 cotton plants at 4 pounds technical per acre 

 were effective in controlling boll weevil larvae 

 in infested cotton squares. However, these ma- 

 terials were not highly effective against natural 

 infestations of boll weevil adults or the boll- 



worm. Several organophosphates were effective 

 against the spider mite. 



19. Bragassa, C. B., and Brazzel, J. R. In- 

 heritance of resistance to endrin in the boll 

 weevil. Jour. Econ. Ent. 54: 311-314. 1961. 



Genetic aspects of endrin resistance in the 

 boll weevil were investigated by subjecting the 

 following strains and crosses to scalar doses of 

 endrin: (a) endrin-resistance and endrin-sus- 

 ceptible strains, and (b) the F x and F 2 progeny 

 of reciprocal crosses of these strains. Results 

 indicated that endrin resistance was genetically 

 controlled in these strains. From the data at 

 hand the indications are that the endrin re- 

 sistance in these strains and crosses was con- 

 trolled by more than one pair of additive auto- 

 somal genes. 



20. Brazzel, J. R. Boll weevil resistance to 

 insecticides in Texas in 1960. Tex. Agr. Expt. 

 Sta. Prog. Rpt. 2171, 4 pp. 1961. 



Boll weevils were collected from 20 areas of 

 the State and treated with endrin and toxa- 

 phene. Results indicated four general areas with 

 resistance levels sufficient to prevent economic 

 control with these insecticides. The central and 

 north-central Texas areas appeared to be inter- 

 mediate insofar as resistance was concerned. 

 Weevils obtained from the rest of the State were 

 susceptible. There was evidence of a considera- 

 ble reversion to susceptibility in the Mumford 

 area, the first in which resistance was observed 

 in 1956. The results of this investigation are 

 based on limited data. 



21. Brazzel, J. R. Destruction of diapause 

 boll weevils as a means of boll weevil control. 

 Tex. Agr. Expt. Sta. Misc. Pub. 511, 22 pp. 

 1961. 



Preliminary experiments indicated that 

 methyl parathion applied at 10- to 12-day inter- 

 vals in the fall will kill boll weevils before they 

 attain diapause. Field experiments indicate an 

 insecticide program of two to four applications 

 applied immediately before and during harvest 

 period, followed by destruction of food and 

 breeding sites by the frost or by chemical or 

 mechanical means, materially reduce, and pos- 

 sibly eradicate, the overwintering boll weevil 

 populations. 



22. Brazzel, J. R. A cotton insect control 

 program based on fall destruction of the boll 

 weevil. Tex. Agr. Expt. Sta. Prog. Rpt. 2250, 

 [5 pp.] 1962. 



Large-scale experiments were conducted in 

 Brazoria and Maverick counties to test the 

 feasibility of incorporating a diapause boll 

 weevil control program during the harvest 

 period in a complete cotton insect control pro- 

 gram. The basis for the experiments was to 

 destroy sufficient weevils in the fall to eliminate 

 the necessity for insecticidal control during the 

 following growing period. This would enable 

 better control by natural factors, such as pred- 

 ators and parasites, on such midseason and 



