other food available, were effectively repelled 

 for 8 hours. Repellency appeared to be associ- 

 ated with the highly pungent odor of the oily 

 residue. 



126. Maxwell, F. G., and others. An ar- 

 restant and feeding stimulant for the boll wee- 

 vil in water extracts of cotton-plant parts. 

 Jour. Econ. Ent. 56: 449-454. 1963. 



J. N. Jenkins, J. C. Keller, and W. L. Parrott, 

 joint authors. 



A powerful arrestant and feeding stimulant 

 was found in water extracts of all cotton-plant 

 parts and square components investigated. 



All cotton-plant parts investigated were found 

 to contain the arrestant in sufficient concentra- 

 tion for bioassay. Flowers at the stage of 

 anthesis and whole squares contained the high- 

 est. In the square, the calyx contained the high- 

 est, and the amount progressively decreased 

 interiorly, with the lowest in the ovary. 



Presence of the arrestant and feeding stimu- 

 lant in germinated seed or seedlings indicated 

 they could be used as screening agents in host- 

 plant resistant programs, which obviates need 

 for fruiting plants. Correlation between weevil 

 feeding response and concentration was almost 

 direct, with the bottom limit at 10,000 p. p.m. 

 Agar plugs with small amounts of water ex- 

 tract from squares elicited a much higher 

 feeding response than a commonly used arti- 

 ficial adult-weevil diet. 



A biological assay method is given. 



127. Maxwell, F. G., and others. A boll 

 weevil feeding deterrent from the calyx of an 

 alternate host, Hibiscus syriacus. Jour. Econ. 

 Ent. 58: 985-988. 1965. 



W. L. Parrott, J. N. Jenkins, and H. H. La- 

 fever, joint authors. 



A biologically active material present in the 

 calyx of Rose-of-Sharon is responsible, in part, 

 for reducing boll weevil feeding significantly 

 on or ovipositing in the developing bud of this 

 plant. This feeding deterrent is water soluble 

 and readily extractable. The calyx extract 

 brushed on cotton buds reduced feeding thereon 

 significantly for 20 hours. When a mixture of 

 freeze-dried feeding deterrent and feeding 

 stimulant, containing 2V2 times more deterrent 

 than stimulant by weight, was formula f ed into 

 plugs containing 2 1/2 percent of agar, feeding 

 response of the boll weevil was completely 

 masked. In a 20-hour test, 10 weevils made only 

 two feeding punctures in 2V2 percent agar 

 plugs containing 0.00166 percent of feeding de- 

 terrent by weight as compared with 92 punc- 

 tures in plugs without the deterrent. 



128. Mayer, M. S., and Brazzel. J. R. Cer- 

 tain biological effects produced in the boll wee- 

 vil bv tagging it with P 32 . Jour. Econ. Ent. 54: 

 1197-1203. 1961. 



Boll weevils were tagged with radioactive 

 phosphorus by feeding P 32 to adults in solutions 

 or rearing them in larval diets in which H 3 P 32 4 



had been added in varying quantities. The rates 

 of loss of radioisotope were higher for those fed 

 P 3 - as adults than for those reared on the radio- 

 active larval diet. 



The fecundity, longevity, and length of ovi- 

 position and preoviposition periods were more 

 adversely affected in the weevils raised on 

 radioactive larval diets than in those fed P 32 as 

 adults. Females reared on the two highest dos- 

 ages in the diet failed to lay eggs. Larval 

 mortality increased in proportion to the amount 

 of radioactivity in the diet, and mortality was 

 always greater and began sooner for weevils 

 reared on the diet. 



129. Mayer, M. S., and Brazzel, J. R. Mat- 

 ing behavior of the boll weevil, Anthonomus 

 giandis. Jour. Econ. Ent. 56: 605-609. 1963. 



Studies were made to determine percentages 

 of weevils mating in various age groups and 

 time interval between repeat mating. The num- 

 ber of males mating increased as their ages 

 increased. The length of the interval of con- 

 finement and the age of the female had less 

 effect on the percentage increase of mating 

 than the age of the male. 



The female would attempt to repulse the 

 male if she had been mated within 24 hours 

 before the mating attempt. Males were found 

 to mate more frequently than females. 



Analyses were made of certain biological 

 phenomena of nonmated, once-mated, and 

 multiple-mated females. Nonmated females laid 

 a high percentage of eggs on the outside of the 

 cotton square, but mated females deposited the 

 majority of eggs on the inside of the square. 

 Once-mated females laid eggs normally for 

 about 19 to 21 days and then reverted to an 

 unmated behavior pattern. 



130. Merkl, M. E., and Meyer, J. M. Stud- 

 ies of resistance of cotton strains to the boll 

 weevil. Jour. Econ. Ent. 56: 860-862. 1963. 



This 4-year resistance study at Stoneville, 

 Miss., included these strains: M-8, D 2 -Smooth, 

 Pilose-Okra leaf, Nectariless, Glandless, Yugo- 

 slav-Early Upland, Red Plant, and Asiatic. The 

 Asiatic strain was significantly more resistant 

 than any of the others. Yugoslav-Early had the 

 earliest and greatest boll weevil infestation. 

 Do-Smooth, Glandless, and Nectariless had in- 

 termediate infestations, all of the same level. 

 Plant height, color, and growth characteristics 

 were factors affecting the percentage of 

 squares punctured. 



131. MiSTRiC, W. J., JR. Effectiveness of 

 rotenone and pyrethrins when mixed with 

 other chemicals for boll weevil control. Jour. 

 Econ, Ent. 57: 765-766. 1964. 



In 1962, a proprietary emulsion concentrate 

 containing rotenone, pyrethrins, and other 

 chemicals was widely publicized and offered for 

 sale on a large-scale experimental basis for boll 

 weevil control. No data were available. Field 

 tests run by the N. C. Agricultural Experiment 



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