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Kochia (Kochia scoparia) Interference in Sunflower (Helianthus annuus)

Published online by Cambridge University Press:  12 June 2017

Beverly R. Durgan ,
Alan G. Dexter  and
Stephen D. Miller
Beverly R. Durgan
Affiliation:
N.D. State Univ., Fargo, ND 58105
Alan G. Dexter
Affiliation:
N.D. State Univ., Fargo, ND 58105
Stephen D. Miller
Affiliation:
N.D. State Univ., Fargo, ND 58105
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Abstract

Field experiments were conducted in 1983 and 1984 at two locations to determine the influence of various densities and durations of kochia interference in sunflower. Sunflower achene yield and dry weight were reduced by all densities of kochia, averaged over locations and years. Season-long competition by kochia densities of 0.3, 1, 3, and 6 plants/m of row decreased sunflower achene yield 7, 10, 20, and 27%, respectively. Sunflower achene yield and sunflower dry weight decreased as weeks of kochia competition increased. Only 2 weeks of kochia competition after sunflower emergence decreased sunflower achene yield 6%. Sunflower achene yield loss increased as the duration of kochia competition increased. Sunflower 200 achene weight, oil content, and plant height were not influenced by various densities or durations of kochia competition.

Keywords

Kochia, Kochia scoparia (L.)Schrad. ♯3 KCHSCsunflower, Helianthus annuus L. var. ‘Seed Tech Hybrid 315’DensitydurationinterferenceKCHSC
Type
Research
Information
Weed Technology , Volume 4 , Issue 1 , March 1990 , pp. 52 - 56
Copyright
Copyright © 1990 Weed Science Society of America 

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References

Literature Cited

1. Chubb, W. O. 1975. Weed competition in sunflower. Manitoba Agron. Conf. (Winnipeg, Man.) Tech. Papers: 129–132.Google Scholar
2. Dahl, G. K., Dexter, A. G., and Nalewaja, J. D. 1982. Kochia competition and control in wheat. Proc. North Cent. Weed Control Conf. 37:15–16.Google Scholar
3. Davis, R. G., Johnson, W. C., and Wood, F. O. 1967. Weed root profile. Agron. J. 59:555–556.CrossRefGoogle Scholar
4. Durgan, B. S., and Miller, S. D. 1981. Wild oat competition in sunflower. Proc. North Cent. Weed Control Conf. 37:17–18.Google Scholar
5. Johnson, B. J. 1971. Effect of weed competition on sunflower. Weed Sci. 19:378–380.CrossRefGoogle Scholar
6. Knake, E. L., and Slife, F. W. 1962. Competition of Setaria faberii with corn and soybeans. Weeds 10:26–29.Google Scholar
7. Miller, S. D., and Nalewaja, J. D. 1982. Influence of tillage, herbicide, and previous crops on weeds in wheat. Abstr. Weed Sci. Soc. Am. No. 39.Google Scholar
8. Phillips, W. M., and Lauchbaugh, J. L. 1956. Preliminary studies of Kochia scoparia at Hays, Kansas. Weeds 6:18–23.Google Scholar
9. Rathmann, D. P., and Miller, S. D. 1981. Wild oat (Avena fatua) competition in soybean (Glycine max). Weed Sci. 29:410–414.CrossRefGoogle Scholar
10. Stevens, O. A. 1965. North Dakota Research Weed Development Notes. N.D. Res. Rep. No. 1. p. 8.Google Scholar
11. Weatherspoon, D. M., and Schweizer, E. E. 1969. Competition between kochia and sugarbeets. Weed Sci. 17:464–467.Google Scholar
12. Wiese, A. F., and Vanidiver, C. W. 1970. Soil moisture effects on competitive ability of weeds. Weed Sci. 18:518–519.Google Scholar
13. Woon, C. K., and Porter, O. A. 1985. Effect of two row spacing and hemp sesbania [Sesbania exaltata (Raf.)Rybd. ex. A. W. Hill]. Competition on sunflowers. Abstr. Weed Sci. Soc. Am. No. 62.Google Scholar