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Johnsongrass Control in Soybeans with Dalapon and Preemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

J. V. Parochetti
J. V. Parochetti*
Affiliation:
Dep. of Agron., Univ. of Maryland, College Park, MD 20742
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Abstract

Treatments were applied to heavily infested johnsongrass [Sorghum halepense (L.) Pers.] in the field for 3 years. Half of each treated plot was cultivated 5 weeks after planting soybeans [Glycine max (L.) Merr.]. Dalapon (2,2-dichloropropionic acid) applied to johnsongrass foliage 7 to 10 days before plowing plus either of the following three preplant incorporated herbicides, trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine), nitralin [4-(methylsulfonyl)-2,6-dinitro-N,N-dipropylaniline], or vernolate (S-propyl dipropylthiocarbamate), gave 85, 68, and 82% johnsongrass control, respectively, at the end of a 3 year study. The preemergence incorporated herbicides applied following plowing and two diskings resulted in poor (35 to 50%) johnsongrass control with significant yield reductions in 2 of the 3 years. When the preemergence incorporated herbicides were applied following two diskings and eight rototillings, johnsongrass control was 62% after 3 years which was significantly less than the 79% control resulting from dalapon plus preemergence herbicides. Cultivation 5 weeks after planting soybeans increased johnsongrass control 22, 35, and 36% and soybean yields 439, 370, and 320 kg/ha in 1969, 1970, and 1971, respectively, over comparable plots without cultivation.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 5 , September 1973 , pp. 426 - 428
Copyright
Copyright © 1973 Weed Science Society of America 

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References

Literature Cited

1. Andrews, H. T., Morgan, T. H. Jr., and Kemp, K. W. 1968. Two year results of growing corn, cotton and soybeans in soil heavily infested with johnsongrass. Proc. S. Weed Conf. 21:152.Google Scholar
2. Frans, R. E. 1966. Johnsongrass control in soybeans and residual effect on succeeding crops. Proc. S. Weed Conf. 18:137–146.Google Scholar
3. Hicks, R. D. 1965. Fall applications of dalapon for preplant control of johnsongrass in row crops. Proc. S. Weed Conf. 18:110–114.Google Scholar
4. Hicks, R. D. 1966. Controlling johnsongrass (Sorghum halepense (L.) Pers.) in row crops. Proc. S. Weed Conf. 19:148–194.Google Scholar
5. Hicks, R. D. and Fletchall, O. H. 1967. Control of johnsongrass in corn. Weeds 15:16–20.CrossRefGoogle Scholar
6. Holm, L. 1969. Weed problems in developing countries. Weed Sci. 17:113–118.CrossRefGoogle Scholar
7. Kerr, H. D., Fletchall, O. H., and Caulder, J. 1969. Controlling johnsongrass for soybean production. Proc. S. Weed Conf. 22:98–99.Google Scholar
8. Millhollon, R. W. 1972. Phytotoxicity of soil incorporated trifluralin. Proc. S. Weed Sci. Soc. 25:49.Google Scholar
9. McWhorter, C. G. and Hartwig, E. E. 1965. Effectiveness of preplanting tillage in relation to herbicides in controlling johnsongrass for soybean production. Agron. J. 57:385–389.Google Scholar
10. McWhorter, C. G. 1972. Factors affecting johnsongrass rhizome production and germination. Weed Sci. 20:41–45.Google Scholar
11. McWhorter, C. G. and Hartwig, E. E. 1972. Competition of johnsongrass and cocklebur with six soybean varieties. Weed Sci. 20:56–59.Google Scholar
12. Standifer, L. C. and Thomas, O. H. 1965. Response of johnsongrass to soil incorporated trifluralin. Weeds 13: 302–306.CrossRefGoogle Scholar
13. Reed, C. F. and Hughes, R. 1970. Selected weeds of the United States. Agricultural Handbook No. 366. Agr. Res. Serv., U.S. Dep. of Agr. 463 pp.Google Scholar
14. Steel, R. G. and Torrie, J. H. 1960. Principles and procedures of statistics. McGraw-Hill Book Co., Inc., New York. 481 pp.Google Scholar