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Dormancy and Field Burial of Cowpea (Vigna unguiculata) Seed

  • Tim R. Murphy (a1), Billy J. Gossett (a1) and Joe E. Toler (a2)


Seed dormancy and soil longevity characteristics of three weedy cowpea [Vigna unguiculata (L.) Walp.] cultivars were investigated. Seed germination was maximum at 40 C; however, ‘Clay’ had greater germination than ‘Black’ or ‘Red Ripper’ cowpea at temperatures ≥ 20 C. Concentrated sulfuric acid soaks, hot (70 C)-water soaks, and piercing the seed coat promoted germination. Seed with an initial water content of 12.3% were stored at relative humidities ranging from 0 to 60% at 25 C. After 4 weeks of storage at relative humidities of 0 to 50%, seed water content varied from 4.6 to 11.4%. Germination and hard seed content was 11% or more and 89% or less, respectively, for seed with water content ranging from 6.9 to 11.4%. Except for seed with an initial water content of 6.9%, cowpea seed water content increased after 3 weeks of storage in a 70% relative humidity environment. Rehydration increased germination for seed with initial water content of 9.2% or more, but not for seed with initial water content of 8.4% or less. In mid-November 1981 and 1982, Black, Clay, Red Ripper, and sicklepod (Cassia obtusifolia L. # CASOB) seed were buried at soil depths of 2.5, 7.5, and 15 cm for 3, 6, and 9 months. Seed survival of Black and Red Ripper was similar to that of sicklepod; however, longevity of Clay seed was less than sicklepod. Survival was greater for seed buried in 1981 than in 1982 because of low seed water content of the 1981 seedlots.



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1. Baciu-Miclaus, Doina. 1970. Contribution to the study of hard seed and seed coat structure properties of soybean. Proc. Int. Seed Test. Assoc. 35:599615.
2. Ballard, L.A.T. 1973. Physical barriers to germination. Seed Sci. Technol. 1:285303.
3. Barton, L. V. 1965. Dormancy in seeds imposed by the seed coat. Pages 727745 in Ruhland, W., ed. Encyclopedia of Plant Physiology. Vol. 15/2. Springer-Verlag, Berlin-Heidelberg-New York.
4. Bewley, J. D. and Black, M. 1982. Dormancy. Pages 60125 in Bewley, J. D. and Black, M., eds. Physiology and Biochemistry of Seeds in Relation to Germination. Vol. 2. Springer-Verlag, Berlin-Heidelberg-New York.
5. Creel, J. M. Jr., Hoveland, C. S., and Buchanan, G. A. 1968. Germination, growth, and ecology of sicklepod. Weed Sci. 16: 396400.
6. Eastin, E. Ford. 1984. Drummond rattlebox (Sesbania drummondi) germination as influenced by scarification, temperature, and seeding depth. Weed Sci. 32:223225.
7. Egley, G. H. 1976. Germination of developing prickly sida seeds. Weed Sci. 24:239243.
8. Egley, G. H. 1979. Seed coat impermeability and germination of showy crotalaria (Crotalaria spectabilis) seeds. Weed Sci. 27:355361.
9. Egley, G. H. and Chandler, J. M. 1978. Germination and viability of weed seeds after 2.5 years in a 50-year buried seed study. Weed Sci. 26:230239.
10. Ellis, R. H., Osei-Bonsu, K., and Roberts, E. H. 1982. The influence of genotype, temperature, and moisture on seed longevity in chickpea., cowpea, and soya-bean. Ann. Bot. 50:6982.
11. Hagon, M. W. 1971. The action of temperature fluctuations on hard seeds of subterraneum clover. Aust. J. Exp. Agric. Anim. Husb. 11:440443.
12. Harrington, J. F. 1949. Hard seeds in beans and other legumes. Seed World 64:4244.
13. Hyde, E.O.C. 1954. The function of the hilum in some Papilonaceae in relation to ripening of seed and the permeability of the testa. Ann. Bot. 18:241256.
14. International Seed Testing Association. 1966. International rules for seed testing. Proc. Int. Seed Test. Assoc. 31:1152.
15. Johnston, S. K., Walker, R. H., and Murray, D. S. 1979. Germination and emergence of hemp sesbania (Sesbania exaltata). Weed Sci. 27:290293.
16. Kowithayakorn, L. and Hill, M. J. 1982. A study of lucerne seed development and some aspects of hard seed content. Seed Sci. Technol. 10:179186.
17. Lebedeff, G. A. 1943. Heredity and environment in the production of hard seeds in common beans (Phaseolus vulgaris). Puerto Rico (Rio Pedras) Univ. Agric. Exp. Stn. Res. Bull. 4:27 pp.
18. Lush, W. M. and Evans, L. T. 1980. The seed coats of cowpeas and other grain legumes: Structure in relation to function. Field Crops Res. 3:267286.
19. Lush, W. M., Evans, L. T., and Wien, H. C. 1980. Environmental adaptation of wild and domesticated cowpeas [Vigna unguiculata (L.) Walp.]. Field Crops Res. 3:173187.
20. Mann, R. K., Rosser, S. W., and Witt, W. W. 1983. Biology and control of tall ironweed (Veronia altissima). Weed Sci. 31:324328.
21. Martin, J. H., Leonard, W. H., and Stamp, D. L. 1976. Cowpeas. Pages 714721 in Martin, J. H., Leonard, W. H., and Stamp, D. L., eds. Principles of Field Crop Production. 3rd ed. The MacMillan Co., New York.
22. Murphy, T. R. and Gossett, B. J. 1984. Control of cowpea (Vigna unguiculata) in soybean (Glycine max) with acifluorfen. Weed Sci. 32:427431.
23. Piper, C. V. 1912. Agricultural varieties of the cowpea and immediately related species. USDA Bur. Plant Industry Bull. 229.
24. Quinlivan, B. J. 1968. The softening of hard seeds of sandplain lupin (Lupinus varius L.) Aust. J. Agric. Res. 19:507515.
25. Robocker, W. C., Williams, M. C., Evans, R. A., and Torell, P. J. 1969. Effects of age, burial, and region on germination and viability of halogeton seed. Weed Sci. 17:6365.
26. Rolston, M. Philip. 1978. Water impermeable seed dormancy. Bot. Rev. 44:365396.
27. Solomon, M. E. 1951. Control of humidity with potassium hydroxide, sulphuric acid, or other solutions. Bull. Entomol. Res. 42:543554.
28. Taylorson, R. B. 1970. Changes in dormancy and viability of weed seeds in soils. Weed Sci. 18:265269.


Dormancy and Field Burial of Cowpea (Vigna unguiculata) Seed

  • Tim R. Murphy (a1), Billy J. Gossett (a1) and Joe E. Toler (a2)


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