Preparation of square powder from three- 

 fourth ton of cotton squares involves freeze- 

 drying, extraction with acetone, grinding in 

 gallon-sized blenders, and draining and squeez- 

 ing with aid of a large screw press. 



Germinated cottonseed puree preparation 

 utilizes a hand-turned stainless steel double 

 roller device. Hulls and seeds are separated by 

 means of water, and meats are pureed in a 

 Waring Blender. Thirty to forty pounds of seed 

 per hour can be hulled as compared with 1 

 pound per hour by handsqueezing. 



With the adult diet press 75 feet of i/i-inch 

 diet cylinders can be formed. 



A motorized cotton-boll slicer prepares bolls 

 for extraction of approximately 65 percent of 

 eggs present. The average hatch of mechani- 

 cally collected eggs is 95 percent. 



A mechanized egg planter, with 78 hypoder- 

 mic needles and the forces of vacuum and 

 compressed air, can plant more eggs in 5 min- 

 utes than can be done by hand in 4 1 /! hours, and 

 with less contamination. 



70. Graves, J. B., and Roussel, J. S. Status 

 of boll weevil resistance to insecticides in 

 Louisiana during 1961. Jour. Econ. Ent. 55: 

 938-940. 1962. 



Expansion of areas in Louisiana infested 

 with chlorinated hydrocarbon resistant boll 

 weevils has occurred yearly since 1955, with 

 the result that all cotton-producing areas of the 

 State are now affected. Considerable reversion 

 to susceptibility has occurred in field popula- 

 tions, but resistance remains at a level suf- 

 ficiently great to prevent effective control with 

 these insecticides. After 5 or 6 years of inten- 

 sive use of organic phosphorus insecticides or 

 toxaphene-DDT mixtures in certain areas, 

 there has been no measurable change in re- 

 sponse of the boll weevil to these insecticides. 

 Under laboratory conditions, a tenfold to 

 twelvefold increase in the LD-50 of a boll wee- 

 vil culture to toxaphene-DDT mixture was ob- 

 tained in 22 generations. 



71. Hanna, R. L., and Walker, J. K., Jr. 

 Youden square as an experimental design for 

 the field evaluation of boll weevil insecticides. 

 Jour. Econ. Ent. 56: 586-588. 1963. 



Youden square plot arrangement has advan- 

 tages when comparing large numbers of 

 insecticidal treatments. Guthion was the most 

 consistently effective insecticide against the 

 boll weevil during the trials in 1959-60. 



72. Hedin, P. A., Cody, C. P., and Thomp- 

 son, A. C, Jr. Antifertility effect of the 

 chemosterilant apholate on the male boll weevil. 

 Jour. Econ. Ent. 57: 270-272. 1964. 



Effectiveness of apholate in decreasing the 

 sperm viability of the male boll weevil was de- 

 termined by allowing the weevils to feed on 

 a diet containing from 0.001 to 0.020 percent 

 of the chemosterilant and on plants sprayed 

 with 0.5 and 2.5 percent solutions of it. After 



both treatments, virgin females mated to 

 treated males oviposited eggs with decreased 

 hatchability and emergence of the Fi progeny. 

 At the higher levels of treatment longevity of 

 males was reduced. Repeated spray applica- 

 tions of the chemosterilant to plants, especi- 

 ally at the higher levels, caused phytotoxicity 

 manifested by leaf necrosis, stunting of 

 growth, and cessation of square production. 



73. HOLLINGS WORTH, J. P., WRIGHT, R. L., 



and Lindquist, D. A. Spectral response char- 

 acteristics of the boll weevil. Jour. Econ. Ent. 

 57: 38-41. 1964. 



A Y-tube test chamber was used in group- 

 response studies with adult boll weevils to de- 

 termine relative attractiveness of equal energy, 

 narrow-band stimuli in the spectral region 

 from 315 to 665 mu.. Maximum response was 

 obtained for wavelengths in the blue-green 

 (490 to 515 m/x) region of the spectrum, with 

 decreased response indicated for both shorter 

 and longer wavelengths. 



74. Hopkins, A. R., and Taft, H. M. Field 

 experiments for control of the boll weevil, boll- 

 worm spp., and the cotton aphid on cotton in 

 1960-62. Jour. Econ. Ent. 57:509-511. 1964. 



In field experiments in Florence, S. C, 

 Geigy G-30494-DDT, Methyl Trithion-DDT, 

 Monsanto CP-40294-DDT, Stauffer R-1504- 

 DDT, and toxaphene-DDT gave control of the 

 boll weevil equal to Guthion-DDT. Results for 

 the other insects named are given. 



75. Hopkins, A. R., and Taft, H. M. Con- 

 trol of certain cotton pests with a new systemic 

 insecticide, UC-21149. Jour. Econ. Ent. 58: 

 746-749. 1965. 



An experimental systemic insecticide, Union 

 Carbide UC-21149, was compared with Di-Sys- 

 ton and phorate in granular formulations ap- 

 plied at planting as in-furrow treatments for 

 control of early-season cotton insects. Addi- 

 tional tests were conducted with UC-21149 as 

 seed treatment or sidedress applied at various 

 stages of cotton plant growth for control of 

 the boll weevil. 



Mortality of overwintered boll weevils was 

 significantly greater with UC-21149 and phor- 

 ate than with Di-Syston. Sidedress treatments 

 produced significant mortality of boll weevil 

 larvae developing within the squares and bolls 

 and of adults feeding on terminal growth. 



76. Hunter, R. C, and others. Evaluation 

 of a selected cross-section of cottons for resist- 

 ance to the boll weevil (Anthonomus grandis 

 Boh.) Ark. Agr. Expt. Sta, Bui. 700, 38 pp. 

 1965. 



T. F. Leigh, C. Lincoln, B. A. Waddle, and 

 L. A. Bariola, joint authors. 



Selected cotton stocks of diverse origin and 

 growth patterns were obtained from obsolete 

 cultivars maintained at Stoneville, Miss., from 

 primitive types collected in Mexico and Central 

 America and maintained at College Station, 



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