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Toxicity of Soil-Incorporated Trifluralin to Johnsongrass (Sorghum halepense) Rhizomes

Published online by Cambridge University Press:  12 June 2017

R. W. Millhollon
R. W. Millhollon*
Affiliation:
Res. Agron., Agric. Res. Serv., U. S. Dep. Agric., U. S. Sugarcane Field Lab., Houma, LA 70361
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Abstract

Rhizomes of johnsongrass [Sorghum halepense (L.) Pers.], cut into 2.5-cm or 15-cm lengths, were planted in the field within and below a 7.5-cm layer of soil mixed with trifluralin (a,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) at 0, 1.7, or 3.4 kg/ha. When planted 3.8- and 10-cm deep in nontreated soil, survival was 90% and 69%, respectively, for the longer rhizomes and only 39% and 10%, respectively, for the shorter ones. When planted within trifluralin-treated soil, 95% and 100% of the shorter rhizomes and 54% and 81% of the longer rhizomes were killed at 1.7 and 3.4 kg/ha, respectively. When planted below treated soil, only 11% or 19% of the longer rhizomes were killed. The shorter rhizomes planted below the treated soil survived at less than 10%.

Type
Research Article
Information
Weed Science , Volume 26 , Issue 2 , March 1978 , pp. 171 - 174
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

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