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Disappearance of DIBOA-glucoside, DIBOA, and BOA from Rye (Secale cereale L.) Cover Crop Residue

Published online by Cambridge University Press:  12 June 2017

Joseph P. Yenish ,
A. Douglas Worsham  and
W. Scott Chilton
Joseph P. Yenish
Affiliation:
Dep. Crop Sci., and Dep. of Bot., N.C. State Univ., Raleigh, NC 27695
A. Douglas Worsham
Affiliation:
Dep. Crop Sci., and Dep. of Bot., N.C. State Univ., Raleigh, NC 27695
W. Scott Chilton
Affiliation:
Dep. Crop Sci., and Dep. of Bot., N.C. State Univ., Raleigh, NC 27695
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Abstract

Disappearance of rye cover crop residue and allelochemicals from rye residue were evaluated in a field study at Clayton, NC, in 1992 and 1993. The aerial portion of rye biomass declined linearly over time with 50% of the residue disappearing by 105 d after clipping. Extrapolations indicated all residue would disappear approximately 200 d after rye clipping. Total content of DIBOA and two related compounds, DIBOA-glucoside and BOA, in the residue also was measured over time. Fifty percent of the 0-d content of the compounds disappeared from residue 10 and 12 d after kill for 1992 and 1993, respectively. Extrapolations indicated content reached 0121 and 168 d after kill for 1992 and 1993, respectively. Reported duration of weed suppression by rye cover crops more closely follows disappearance of allelochemicals from rye residue than disappearance of the residue.

Keywords

BOA, benzoxazolin-2-oneDIBOA, 2,4-dihydroxy-1,4-benzoxazin-3(4H)-oneDIBOA-glucoside, 2-(2,4-dihydroxy-1,4(2H)-benzoxazin-3(4H)-one)-β-D-glucopyranosiderye, Secale cereale L. ‘Wren's Abruzzi.’Allelopathycyclic hydroxamic acids
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 43 , Issue 1 , March 1995 , pp. 18 - 20
Copyright
Copyright © 1995 by the Weed Science Society of America 

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