Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-23T00:45:24.207Z Has data issue: false hasContentIssue false
  • English
  • Français

Growth of Johnsongrass Selections Under Different Temperatures and Dark Periods

Published online by Cambridge University Press:  12 June 2017

G. W. Burt  and
I. M. Wedderspoon
G. W. Burt
Affiliation:
Dep. of Agron., Univ. of Maryland, College Park, Maryland
I. M. Wedderspoon
Affiliation:
Weed Control Inspection, State Board of Agr., College Park, Maryland Dep. of Agron., Univ. of Maryland, College Park, Maryland 20742
Get access Rights & Permissions [Opens in a new window]

Abstract

The differential response of three selections of johnsongrass (Sorghum halepense (L.) Pers.) to different temperatures and dark periods was studied in two experiments conducted in growth chambers. The three selections of johnsongrass were obtained from locations representing different climates. At 20 C all three selections grew equally with respect to most parameters of growth studied; however, at 35 C the selection from the southern climate produced more total fresh weight than the other two selections. Rhizome production and the number of stems also were greater in the southern selection at 35 C. An 8-hr dark period prevented flowering in all three selections and significantly reduced rhizome production in two selections compared to the 12-hr dark period. Flowering occurred most rapidly in the selection from a northern climate and most slowly in the selection from a southern climate. The results are discussed in relation to the possible plant adaptive changes and the possibility of weed control through dark period interruption.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 4 , July 1971 , pp. 419 - 423
Copyright
Copyright © Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Anderson, L. E., Appleby, A. P., and Weseloh, J. W. 1960. Characteristics of johnsongrass rhizomes. Weeds 8:402–406.CrossRefGoogle Scholar
2. Bennett, H. W. 1940. Variations in Johnson and Dallis grass. Assoc. So. Agr. Workers Proc. 41:85–86.Google Scholar
3. Hamilton, K. C. and Tucker, H. 1964. Response of selected and random plantings of johnsongrass to dalapon. Weeds 12:220–222.CrossRefGoogle Scholar
4. Hamner, K. C. and Bonner, J. 1938. Photoperiodism in relation to hormones as factors in floral initiation. Bot. Gaz. 100:388–431.CrossRefGoogle Scholar
5. Hoagland, D. R. and Arnon, D. I. 1950. The water culture method of growing plants without soil. California Agr. Exp. Sta. Circ. 347. 32 p.Google Scholar
6. Holm, L. 1969. Weed Problems in Developing Countries. Weed Sci. 17:113–118.CrossRefGoogle Scholar
7. Hull, R. J. 1969. Translocation of assimilates and dalapon in established johnsongrass. Weed Sci. 17:314–320.CrossRefGoogle Scholar
8. Ingle, M. and Rodgers, B. J. 1961. The growth of a midwestern strain of Sorghum halepense under controlled conditions. Amer. J. Bot. 48:392–396.CrossRefGoogle Scholar
9. King, L. J. 1966. Weed ecotypes–a review. Proc. No. East. Weed Control Conf. 20:604–611.Google Scholar
10. McWhorter, C. G. 1961. Morphology and development of johnsongrass plants from seeds and rhizomes. Weeds 9:558–562.CrossRefGoogle Scholar
11. Oyer, E. B., Gries, G. A., and Rodgers, B. J. 1959. The seasonal development of johnsongrass plants. Weeds 7:13–19.CrossRefGoogle Scholar
12. Sturkie, D. G. 1930. The influence of various top-cutting treatments on rootstocks of johnsongrass (Sorghum halepense). J. Amer. Soc. Agron. 22:82–93.CrossRefGoogle Scholar
13. Taylorson, R. B. and McWhorter, C. G. 1969. Seed dormancy and germination in ecotypes of johnsongrass. Weed Sci. 17:359–361.CrossRefGoogle Scholar
14. Vinall, H. N. 1926. Johnsongrass: Its production for hay and pasturage. U. S. Dep. Agr. Farmers Bull. 1476. 21 p.Google Scholar
15. Woodman, R. M. 1939. Studies in the nutrition of vegetables. The effects of variation in the nitrogen supply on lettuce (v. May King) in sand culture. Ann. Bot. Land. ns. 3:649–656.CrossRefGoogle Scholar