Paper · 1984 · Tropical Pest Management

Evaluation of herbicides for maize production in three ecological zones of Nigeria

W. B. Ndahi

2
claims
5
verbatim quotes
3
citations
2
research areas
—
Not open access

Abstract

Abstract Maize cultivation in Nigeria has increased rapidly in the last few years as fertilizers have become more readily available to farmers. Without the use of herbicides however, the area of land that can be brought under maize production will be limited. The following herbicides were evaluated in three ecological zones of Nigeria: atrazine and mixtures of atrazine and simazine, atrazine and metolachlor and atrazine and cyanazine. All herbicide treatments were applied at the rate of either 1.0 or 2.0 kg a.i./ha. The plots that received 1.0 kg a.i./ha also received one supplementary hand weeding. All treatments gave yields comparable to the weed free control, with the exception of the unweeded higher rate of the atrazine and cyanazine treatment which gave the lowest grain yield as a result of poor weed control.

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Claims 2

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

All herbicide treatments in maize gave yields comparable to the weed-free control.

Taxon
MaizeZea mayse1
Treatment
herbicide treatmentse2
Interactor
weede3weed
Outcome
yieldse3
Direction
comparablee3
Comparator
weed free controle3

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

e1

“Maize cultivation in Nigeria”

✓ located verbatim in the source · abstract, characters 9–37 · show in text ↑
e2

“All herbicide treatments were applied at the rate of either 1.0 or 2.0 kg a.i./ha”

✓ located verbatim in the source · abstract, characters 439–520 · show in text ↑
e3

“All treatments gave yields comparable to the weed free control, with the exception of the unweeded higher rate of the atrazine and cyanazine treatment which gave the lowest grain yield as a result of poor weed control”

✓ located verbatim in the source · abstract, characters 607–824 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The unweeded higher rate of atrazine and cyanazine gave the lowest maize grain yield, due to poor weed control.

Taxon
MaizeZea mayse1
Treatment
unweeded higher rate of the atrazine and cyanazine treatmente3
Interactor
weede3weed
Outcome
grain yielde3
Direction
loweste3
Qualifier
as a result of poor weed controle3
Comparator
All treatmentse3

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

e1

“Maize cultivation in Nigeria”

✓ located verbatim in the source · abstract, characters 9–37 · show in text ↑
e3

“All treatments gave yields comparable to the weed free control, with the exception of the unweeded higher rate of the atrazine and cyanazine treatment which gave the lowest grain yield as a result of poor weed control”

✓ located verbatim in the source · abstract, characters 607–824 · 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. positive
  2. positive
  3. positive

236 papers more in this group

See all 240 papers →

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

8 papers: 5 positive, 3 negative or no effect

2 papers in the same direction as this paper · 5 in the opposite direction

  1. positive
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

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

651 papers: 500 positive, 151 negative or no effect

499 papers in the same direction as this paper · 127 in the opposite direction · 24 reporting no difference from an alternative

  1. positive
  2. negative
  3. negative

647 papers more in this group

See all 651 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.