Persistence and biological activity of four ALS-inhibiting herbicides in soil

M M  Franey; A  Walker; C D  Brown

Persistence and biological activity of four ALS-inhibiting herbicides in soil

M M Franey, A Walker, C D Brown

Environment and Geography

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The herbicides metsulfuron-methyl, flupyrsulfuron-methyl, iodosulfuronmethyl and propoxycarbazone-sodium were incubated in a sandy loam soil at 15degreesC and at a soil water potential of -33kPa. The general order of persistence was propoxycarbazone-sodium > metsulfuron-methyl > flupyrsulfuron-methyl > iodosulfuron-methyl with first-order half-lives ranging from 10 to 89 days. The herbicides were also incorporated into soil at logarithmically increasing concentrations from 0.1 to 25.6 mug/kg. Sugar beet, oilseed rape, winter beans and spring barley were grown in the treated soils for 21 to 28 days. There were marked differences between compounds and between crops in the doses required to reduce shoot fresh weights by 10 (ED10) or 50% (ED50). In general, metsulfuron-methyl and flupyrsulfuron-methyl were more active than the other compounds tested. On the basis of the half-lives and crop response data, the herbicide degradation model PERSIST was used to predict safe recrop intervals following normal spring application of the study compounds.

Original language	English
Title of host publication	PESTICIDE IN AIR, PLANT, SOIL & WATER SYSTEM
Editors	AAM DelRe, E Capri, L Padovani, M Trevisan
Place of Publication	27100 PAVIA
Publisher	LA GOLIARDICA PAVESE
Pages	239-246
Number of pages	8
ISBN (Print)	88-7830-359-3
Publication status	Published - 2003

Keywords

herbicides
persistence
soils
crop safety
modelling

Cite this

@inproceedings{c7df80b131344614b175462131447896,

title = "Persistence and biological activity of four ALS-inhibiting herbicides in soil",

abstract = "The herbicides metsulfuron-methyl, flupyrsulfuron-methyl, iodosulfuronmethyl and propoxycarbazone-sodium were incubated in a sandy loam soil at 15degreesC and at a soil water potential of -33kPa. The general order of persistence was propoxycarbazone-sodium > metsulfuron-methyl > flupyrsulfuron-methyl > iodosulfuron-methyl with first-order half-lives ranging from 10 to 89 days. The herbicides were also incorporated into soil at logarithmically increasing concentrations from 0.1 to 25.6 mug/kg. Sugar beet, oilseed rape, winter beans and spring barley were grown in the treated soils for 21 to 28 days. There were marked differences between compounds and between crops in the doses required to reduce shoot fresh weights by 10 (ED10) or 50% (ED50). In general, metsulfuron-methyl and flupyrsulfuron-methyl were more active than the other compounds tested. On the basis of the half-lives and crop response data, the herbicide degradation model PERSIST was used to predict safe recrop intervals following normal spring application of the study compounds.",

keywords = "herbicides, persistence, soils, crop safety, modelling",

author = "Franey, {M M} and A Walker and Brown, {C D}",

year = "2003",

language = "English",

isbn = "88-7830-359-3",

pages = "239--246",

editor = "AAM DelRe and E Capri and L Padovani and M Trevisan",

booktitle = "PESTICIDE IN AIR, PLANT, SOIL & WATER SYSTEM",

publisher = "LA GOLIARDICA PAVESE",

}

TY - GEN

T1 - Persistence and biological activity of four ALS-inhibiting herbicides in soil

AU - Franey, M M

AU - Walker, A

AU - Brown, C D

PY - 2003

Y1 - 2003

N2 - The herbicides metsulfuron-methyl, flupyrsulfuron-methyl, iodosulfuronmethyl and propoxycarbazone-sodium were incubated in a sandy loam soil at 15degreesC and at a soil water potential of -33kPa. The general order of persistence was propoxycarbazone-sodium > metsulfuron-methyl > flupyrsulfuron-methyl > iodosulfuron-methyl with first-order half-lives ranging from 10 to 89 days. The herbicides were also incorporated into soil at logarithmically increasing concentrations from 0.1 to 25.6 mug/kg. Sugar beet, oilseed rape, winter beans and spring barley were grown in the treated soils for 21 to 28 days. There were marked differences between compounds and between crops in the doses required to reduce shoot fresh weights by 10 (ED10) or 50% (ED50). In general, metsulfuron-methyl and flupyrsulfuron-methyl were more active than the other compounds tested. On the basis of the half-lives and crop response data, the herbicide degradation model PERSIST was used to predict safe recrop intervals following normal spring application of the study compounds.

AB - The herbicides metsulfuron-methyl, flupyrsulfuron-methyl, iodosulfuronmethyl and propoxycarbazone-sodium were incubated in a sandy loam soil at 15degreesC and at a soil water potential of -33kPa. The general order of persistence was propoxycarbazone-sodium > metsulfuron-methyl > flupyrsulfuron-methyl > iodosulfuron-methyl with first-order half-lives ranging from 10 to 89 days. The herbicides were also incorporated into soil at logarithmically increasing concentrations from 0.1 to 25.6 mug/kg. Sugar beet, oilseed rape, winter beans and spring barley were grown in the treated soils for 21 to 28 days. There were marked differences between compounds and between crops in the doses required to reduce shoot fresh weights by 10 (ED10) or 50% (ED50). In general, metsulfuron-methyl and flupyrsulfuron-methyl were more active than the other compounds tested. On the basis of the half-lives and crop response data, the herbicide degradation model PERSIST was used to predict safe recrop intervals following normal spring application of the study compounds.

KW - herbicides

KW - persistence

KW - soils

KW - crop safety

KW - modelling

M3 - Conference contribution

SN - 88-7830-359-3

SP - 239

EP - 246

BT - PESTICIDE IN AIR, PLANT, SOIL & WATER SYSTEM

A2 - DelRe, AAM

A2 - Capri, E

A2 - Padovani, L

A2 - Trevisan, M

PB - LA GOLIARDICA PAVESE

CY - 27100 PAVIA

ER -