Identification of environmental factors limiting plant uptake of metaldehyde seed treatments under field conditions

Louise Simms, Julian James Charles Dawson, Graeme Iain Paton, Michael John Wilson

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Slugs are serious pests of oilseed rape ( canola) and wheat with most damage occurring just after sowing and seedling emergence. As an alternative to the use of bait pellets, molluscicidal seed treatments have been shown to protect seeds and seedlings from slug damage in laboratory and semi- field experiments. However, protection offered to plants in field trials was diminished and short-lived in comparison with laboratory experiments. To determine why field efficacy was reduced, we grew seedlings under a range of environmental conditions, with appropriate controls, that simulated differences between laboratory and field experiments. We then measured the metaldehyde content of plant seedlings using a previously unpublished methodology described herein, which, unlike previous methods, did not first depolymerize the metaldehyde to acetaldehyde. We confirmed that naturally abundant plant- derived acetaldehyde could not interfere with our measurements of metaldehyde, even if depolymerization took place within the column. Our data suggest that reduced field efficacy results from microbial breakdown and/ or loss of active ingredient caused by percolating soil water. Once the seedlings had emerged, neither volatalization nor simulated rainwater reduced the metaldehyde content of seedlings. Our findings will help develop superior seed treatment formulations to overcome these constraints.

Original languageEnglish
Pages (from-to)3646-3650
Number of pages4
JournalJournal of Agricultural and Food Chemistry
Volume54
Issue number10
DOIs
Publication statusPublished - 2006

Keywords

  • metaldehyde
  • seed treatments
  • field efficacy
  • microbial degradation
  • slug

Cite this

Identification of environmental factors limiting plant uptake of metaldehyde seed treatments under field conditions. / Simms, Louise; Dawson, Julian James Charles; Paton, Graeme Iain; Wilson, Michael John.

In: Journal of Agricultural and Food Chemistry, Vol. 54, No. 10, 2006, p. 3646-3650.

Research output: Contribution to journalArticle

@article{5d8df17febbd40408df381eec5fe97cd,
title = "Identification of environmental factors limiting plant uptake of metaldehyde seed treatments under field conditions",
abstract = "Slugs are serious pests of oilseed rape ( canola) and wheat with most damage occurring just after sowing and seedling emergence. As an alternative to the use of bait pellets, molluscicidal seed treatments have been shown to protect seeds and seedlings from slug damage in laboratory and semi- field experiments. However, protection offered to plants in field trials was diminished and short-lived in comparison with laboratory experiments. To determine why field efficacy was reduced, we grew seedlings under a range of environmental conditions, with appropriate controls, that simulated differences between laboratory and field experiments. We then measured the metaldehyde content of plant seedlings using a previously unpublished methodology described herein, which, unlike previous methods, did not first depolymerize the metaldehyde to acetaldehyde. We confirmed that naturally abundant plant- derived acetaldehyde could not interfere with our measurements of metaldehyde, even if depolymerization took place within the column. Our data suggest that reduced field efficacy results from microbial breakdown and/ or loss of active ingredient caused by percolating soil water. Once the seedlings had emerged, neither volatalization nor simulated rainwater reduced the metaldehyde content of seedlings. Our findings will help develop superior seed treatment formulations to overcome these constraints.",
keywords = "metaldehyde, seed treatments, field efficacy, microbial degradation, slug",
author = "Louise Simms and Dawson, {Julian James Charles} and Paton, {Graeme Iain} and Wilson, {Michael John}",
year = "2006",
doi = "10.1021/jf060231a",
language = "English",
volume = "54",
pages = "3646--3650",
journal = "Journal of Agricultural and Food Chemistry",
issn = "0021-8561",
publisher = "American Chemical Society",
number = "10",

}

TY - JOUR

T1 - Identification of environmental factors limiting plant uptake of metaldehyde seed treatments under field conditions

AU - Simms, Louise

AU - Dawson, Julian James Charles

AU - Paton, Graeme Iain

AU - Wilson, Michael John

PY - 2006

Y1 - 2006

N2 - Slugs are serious pests of oilseed rape ( canola) and wheat with most damage occurring just after sowing and seedling emergence. As an alternative to the use of bait pellets, molluscicidal seed treatments have been shown to protect seeds and seedlings from slug damage in laboratory and semi- field experiments. However, protection offered to plants in field trials was diminished and short-lived in comparison with laboratory experiments. To determine why field efficacy was reduced, we grew seedlings under a range of environmental conditions, with appropriate controls, that simulated differences between laboratory and field experiments. We then measured the metaldehyde content of plant seedlings using a previously unpublished methodology described herein, which, unlike previous methods, did not first depolymerize the metaldehyde to acetaldehyde. We confirmed that naturally abundant plant- derived acetaldehyde could not interfere with our measurements of metaldehyde, even if depolymerization took place within the column. Our data suggest that reduced field efficacy results from microbial breakdown and/ or loss of active ingredient caused by percolating soil water. Once the seedlings had emerged, neither volatalization nor simulated rainwater reduced the metaldehyde content of seedlings. Our findings will help develop superior seed treatment formulations to overcome these constraints.

AB - Slugs are serious pests of oilseed rape ( canola) and wheat with most damage occurring just after sowing and seedling emergence. As an alternative to the use of bait pellets, molluscicidal seed treatments have been shown to protect seeds and seedlings from slug damage in laboratory and semi- field experiments. However, protection offered to plants in field trials was diminished and short-lived in comparison with laboratory experiments. To determine why field efficacy was reduced, we grew seedlings under a range of environmental conditions, with appropriate controls, that simulated differences between laboratory and field experiments. We then measured the metaldehyde content of plant seedlings using a previously unpublished methodology described herein, which, unlike previous methods, did not first depolymerize the metaldehyde to acetaldehyde. We confirmed that naturally abundant plant- derived acetaldehyde could not interfere with our measurements of metaldehyde, even if depolymerization took place within the column. Our data suggest that reduced field efficacy results from microbial breakdown and/ or loss of active ingredient caused by percolating soil water. Once the seedlings had emerged, neither volatalization nor simulated rainwater reduced the metaldehyde content of seedlings. Our findings will help develop superior seed treatment formulations to overcome these constraints.

KW - metaldehyde

KW - seed treatments

KW - field efficacy

KW - microbial degradation

KW - slug

U2 - 10.1021/jf060231a

DO - 10.1021/jf060231a

M3 - Article

VL - 54

SP - 3646

EP - 3650

JO - Journal of Agricultural and Food Chemistry

JF - Journal of Agricultural and Food Chemistry

SN - 0021-8561

IS - 10

ER -