Paper · 2001 · Proceedings of the New Zealand Weed Control Conference

Weed seedbank dynamics in maize under different herbicide regimes

A. Rahman; T.K. James; J. Mellsop; et al.

6
claims
11
verbatim quotes
7
citations
3
research areas
✓
Open access

Abstract

The influence of different herbicide regimes on the size and composition of the soil weed seedbank in maize was studied over three years Preemergence atrazine alachlor atrazine alachlor or no herbicide treatments were imposed on the same plots each year Soil samples to 100 mm depth were collected each autumn and spring and the seedbank was estimated by seed extraction and seedling emergence Data showed strong positive correlation between the two methods Soil seedbank increased dramatically by each autumn but declined by spring The total seedbank increased over three years in the no herbicide treatment Good weed control by atrazine alachlor kept seedbank density at low levels However seed numbers increased particularly in the first two years with only partial weed control using atrazine or alachlor singly A sharp increase of fathen (Chenopodium album) seeds illustrated the danger of building seedbanks of weeds which become tolerant to the strategies used

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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 6

Method / resourceobservedoriginal resultpositivemeasured

Claim · model-written summary

Seedbank extraction and seedling emergence methods were strongly positively correlated.

Outcome
strong positive correlatione1
Comparator
the two methodse1

Verbatim

e1

“Data showed strong positive correlation between the two methods”

✓ located verbatim in the source · abstract, characters 394–457 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The soil seedbank in maize increased dramatically each autumn but declined by spring.

Taxon
maizeZea mayst0
Outcome
Soil seedbanke2
Qualifier
increased dramatically by each autumne2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Weed seedbank dynamics in maize under different herbicide regimes”

✓ located verbatim in the source · title, characters 0–65 · show in text ↑
e2

“Soil seedbank increased dramatically by each autumn but declined by spring”

✓ located verbatim in the source · abstract, characters 458–532 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The total seedbank increased over three years in the no herbicide treatment of maize.

Taxon
maizeZea mayst0
Treatment
no herbicidee3
Outcome
total seedbanke3
Direction
increasede3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Weed seedbank dynamics in maize under different herbicide regimes”

✓ located verbatim in the source · title, characters 0–65 · show in text ↑
e3

“The total seedbank increased over three years in the no herbicide treatment”

✓ located verbatim in the source · abstract, characters 533–608 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Atrazine plus alachlor kept seedbank density at low levels in maize.

Taxon
maizeZea mayst0
Treatment
atrazine alachlore4
Outcome
seedbank densitye4
Direction
kepte4

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Weed seedbank dynamics in maize under different herbicide regimes”

✓ located verbatim in the source · title, characters 0–65 · show in text ↑
e4

“Good weed control by atrazine alachlor kept seedbank density at low levels”

✓ located verbatim in the source · abstract, characters 609–683 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed numbers increased in maize with partial weed control using atrazine or alachlor singly, particularly in the first two years.

Taxon
maizeZea mayst0
Treatment
atrazine or alachlor singlye5
Outcome
seed numberse5
Direction
increasede5
Qualifier
particularly in the first two yearse5

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

t0

“Weed seedbank dynamics in maize under different herbicide regimes”

✓ located verbatim in the source · title, characters 0–65 · show in text ↑
e5

“However seed numbers increased particularly in the first two years with only partial weed control using atrazine or alachlor singly”

✓ located verbatim in the source · abstract, characters 684–815 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

A sharp increase of fathen (Chenopodium album) seeds occurred in the maize seedbank.

Taxon
maizeZea mayst0
Interactor
Chenopodium albumChenopodium albume6weed
Outcome
sharp increase of fathen (Chenopodium album) seedse6

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗
Chenopodium album
Chenopodium album · InteractorOlivier Pichard · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“Weed seedbank dynamics in maize under different herbicide regimes”

✓ located verbatim in the source · title, characters 0–65 · show in text ↑
e6

“A sharp increase of fathen (Chenopodium album) seeds illustrated the danger of building seedbanks of weeds which become tolerant to the strategies used”

✓ located verbatim in the source · abstract, characters 816–967 · show in text ↑

atrazine · yield · Zea mays (maize)Results differ

240 papers: 205 positive, 35 negative or no effect

34 papers in the same direction as this paper · 205 in the opposite direction

  1. negative
  2. positive
  3. positive

236 papers more in this group

See all 240 papers →

alachlor · yield · Zea mays (maize)Positive and negative results

27 papers: 20 positive, 7 negative or no effect

6 papers in the same direction as this paper · 20 in the opposite direction

  1. positive
  2. positive
  3. positive

23 papers more in this group

See all 27 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.