Wolf Prize in Agriculture (1157 Pages)

John C. Walker

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449. Williams, P. H., and. J. C. Walker. Inheritance of Rhizoctonia bottom rot

resistance in cabbage. Phytopathology 56: 367-368. 1966.

450. Darby, J. F., and J. C. Walker. Progress report of cabbage variety trials. 1965-

1966. Central Fla. Experiment Sta. 15 pp. 1966.

451. Patel, P. N., and. J. C. Walker. Inheritance of tolerance to halo blight in bean.

Phytopathology 56: 681-682. 1966.

452. Annon. Fellows of the American Phytopathological Society. Phytopathology

56: 380- 388. 1966.

453. Walker, J. C. Translation of Plant Pathology, 2nd ed., to Arabic. El Alwan

Press, Cairo. 1966.

454. Walker, J. C. The role of pest resistance in new varieties. In Plant Breeding, a

symposium held at Iowa State University (1965). K. J. Frey Ed. pp 219-242.

1966.

455. Dodman, R. L., K. R. Barker, and. J. C. Walker. Auxin production by Rhizoctonia

solani. Phytopathology 56: 875. 1966.

456. Dodman, R. L., and J. C. Walker. Modes of penetration of  different isolates of

Rhizoctonia solani. Phytopathology 56: 875. 1966.

457. Walker, J. C., and J. F. Derby. Black speck and bacterial diseases. Cabbage

variety trials 1966-1967. Central Fla. Agr. Exp. Sta. Mimeo Report CFES

67-1. 10 p. 1967.

458. Keen, N. T., P. H. Williams, and J. C. Walker. Characterization of a protease

produced Pseudomonas lachrymans. Phytopathology 57: 257-262. 1967.

459. Keen, N. T., P. H. Williams, and J. C. Walker. Protease of Pseudomonas

lachrymans in relation to cucumber angular leaf spot. Phytopathology 57:

263-271. 1967.

460. Struckmeyer, B. E., and J. C. Walker. The anatomy of internal tipburn of

cabbage. Amer. J. Bot. 54: 228-231. 1967.

461. Patel, P. N., and J. C. Walker. Changes in free amino acid and amide content

of bean, tobacco and oat leaves after infection with Pseudomonas phaseolicola,

P. tabaci, and. P. coronafaciens, respectively, and in leaves treated with toxins.

Intl. Symposium on Plant Pathology, New Delhi, India, Dec. 27, 1966-Jan. 1,

1967.

462. Walker, J. C. Concluding remarks. Intl. Symposium on virus diseases of rice.

Apr. 28, 1967. Intl. Rice Research Institute, Los Banos, P.1. In The Virus

Diseases of the Rice Plant. John Hopkins Press, 1969.

463. Dodman, R. L., K. R. Barker, and J. C. Walker. Modes of  penetration by

different isolates of Rhizoctonia solani. Phytopathology 58: 31-33. 1968.

464. Williams, P. H., J. C. Walker, and G. S. Pound. Hybelle and Sanibel multiple

disease-resistant F1 hybrid cabbage. Phytopathology 58: 791-796. 1968.

465. Dodman, R. L., K. R. Barker, and J. C. Walker. A detailed study of the different

modes of penetration by Rhizoctonia solani. Phytopathology 58: 1271-1276.

1968.

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Wolf Prize in Agriculture

466. Walker, J. C. Plant Pathology. 3rd. edition. McGraw-Hill Co., New York.

1969. Not bound herein.

467. Chand, J. N., and J. C. Walker. Relation of free amino acids in cucumber

leaves to the development of angular leaf spot. Phyt. Ztschr. 64: 94-97.

1969.

468. Walker, J. C. Plant Pathology, its background and importance. BSA McGraw-

Hill Tape. 1969.

469. Walker, J. C. The story of disease resistance in cabbage. Tape I. 1969.

470. Walker, J. C. The story of disease resistance in cabbage. Tape II. 1969.

471. Walker, J. C. Six decades with cabbage clubroot. Tape 1969.

472. Halloin, J. M., J. C. Walker, G. A. de Zoeten, and G. Gaard. Effects of tentoxin

on plastids of cucumber and cabbage. Phytopathology 59: 1028-1029. 1969.

473. Strandberg, J. O., J. F. Darby, J. C. Walker, and P. H. Williams. Black speck, a

nonparasitic disease of cabbage. Phytopathology 59: 1879-1883. 1969.

474. Halloin, J. M., G. A. de Zoeten, G. Gaard, and J. C. Walker. The effects of

tentoxin on chlorophyll synthesis and plastid structure in cuctumber and

cabbage. Plant Physiol. 45: 310-3l4. 1970.

475. Yoshii, K., and J. C. Walker. Production of indolacetic acid in culture by

Pythium debaryanum. Phytopathology 60: 1321. 1970.

476. Main, Charles E., and J. C. Walker. Physiological responses of susceptible and

resistant cucumber to Erwinia tracheiphila. Phytopathology 61: 518-522.

1971.

477. Walker, J. C. Fusarium wilt of  tomato. Amer. Phytopathol. Soc. Monograph

No. 6. 1971.

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Professor Sprague (a geneticist – plant breeder) has achieved world eminence in

the development of improved crop plants to the extent of greatly stabilizing the

culture, increasing yields, and improving the quality of a number of major vegetable

crops, and of maize – one of the world’s dominant grain crops. He has developed

novel and efficient methodology of breeding techniques and procedures. He was a

towering figure in contributing to both applied and basic research. He had most

enviable records of having trained scientific manpower for agriculture’s needs. His

students are to be found throughout the world, many of them having established

themselves as distinguished researchers, educators and/or administrators. He served

well the organizations of his respective science and agricultural industry, as well

as the governments of  the world.

In the annals of world agriculture, hybrid maize is the most spectacular example

of  the exploitation of  a genetic phenomenon heterosis for increasing food

production. Unquestionably Professor Sprague’s name ranks foremost in the

40-year-long history of this great achievement of agricultural science. Moreover,

many of the concepts, much of  the theory and, any of the breeding models, which

he developed for maize, have influenced the improvement of other crop plants.

Throughout his long and distinguished scientific career, Professor Sprague has

worked untiringly to link theoretical quantitative genetic theory to practical plant

breeding. Among his most fruitful basic studies was the development of  a

mathematical genetic model for selection that led to the development of an improved

1902–1998

George F. Sprague

University of Illinois

Urbana, Illinois, USA

k

1978 — for his research in plant

pathology, developing of

disease-resistant varieties of

major food plants.

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