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Title: Yellow nutsedge (Cyperus esculentus L. ) control with herbicides: the role of tuberization

Abstract

Trials were carried out under greenhouse, growth chamber, laboratory, outdoor pot, and field conditions to characterize stages of yellow nutsedge tuberization and to investigate the influence of herbicides. The effects of herbicides on tuberization and phytotoxicity at several growth stages, as well as on sprouting, growth characteristics, and survival of new tubers were determined. Tuberization was a continuous process, but was modulated by plant age and environmental conditions. The growth stage that included the time of first tuber initiation was the best for applying glyphosate (N-(phosphonomethyl)glycine) and oxyfluorfen (2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluromethyl)benzene). Plant-age and length of period after spraying influenced glyphosate and oxyfluorfen absorption and translocation. Addition of unlabelled oxyfluorfen as a tank mixture can glyphosate increased absorption of /sup 14/C-glyphosate to 27% after 1 day and 46% after 8 days and increased translocation into other plant parts. Timing of postemergence herbicide applications relative to tuberization is crucial for overall control of yellow nutsedge. When soil applied herbicides were compared in the field, consecutive applications of dichlobenil (2,6-dichlorobenzonitrile) and metolachlor (2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide) for two years provided the best control of nutsedge.

Authors:
Publication Date:
Research Org.:
Oregon State Univ., Corvallis (USA)
OSTI Identifier:
7169644
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 59 BASIC BIOLOGICAL SCIENCES; CARBON 14 COMPOUNDS; UPTAKE; HERBICIDES; BIOLOGICAL EFFECTS; AGE DEPENDENCE; BENCH-SCALE EXPERIMENTS; BIOCHEMISTRY; FIELD TESTS; OXYFLUORIDES; PLANT GROWTH; TRANSLOCATION; TUBERS; CHEMISTRY; FLUORINE COMPOUNDS; GROWTH; HALOGEN COMPOUNDS; LABELLED COMPOUNDS; OXYGEN COMPOUNDS; PESTICIDES; TESTING; 560300* - Chemicals Metabolism & Toxicology; 550201 - Biochemistry- Tracer Techniques

Citation Formats

Pereira, W. Yellow nutsedge (Cyperus esculentus L. ) control with herbicides: the role of tuberization. United States: N. p., 1985. Web.
Pereira, W. Yellow nutsedge (Cyperus esculentus L. ) control with herbicides: the role of tuberization. United States.
Pereira, W. Tue . "Yellow nutsedge (Cyperus esculentus L. ) control with herbicides: the role of tuberization". United States.
@article{osti_7169644,
title = {Yellow nutsedge (Cyperus esculentus L. ) control with herbicides: the role of tuberization},
author = {Pereira, W.},
abstractNote = {Trials were carried out under greenhouse, growth chamber, laboratory, outdoor pot, and field conditions to characterize stages of yellow nutsedge tuberization and to investigate the influence of herbicides. The effects of herbicides on tuberization and phytotoxicity at several growth stages, as well as on sprouting, growth characteristics, and survival of new tubers were determined. Tuberization was a continuous process, but was modulated by plant age and environmental conditions. The growth stage that included the time of first tuber initiation was the best for applying glyphosate (N-(phosphonomethyl)glycine) and oxyfluorfen (2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluromethyl)benzene). Plant-age and length of period after spraying influenced glyphosate and oxyfluorfen absorption and translocation. Addition of unlabelled oxyfluorfen as a tank mixture can glyphosate increased absorption of /sup 14/C-glyphosate to 27% after 1 day and 46% after 8 days and increased translocation into other plant parts. Timing of postemergence herbicide applications relative to tuberization is crucial for overall control of yellow nutsedge. When soil applied herbicides were compared in the field, consecutive applications of dichlobenil (2,6-dichlorobenzonitrile) and metolachlor (2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide) for two years provided the best control of nutsedge.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Thesis/Dissertation:
Other availability
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