Abstract
The effect of spatial arrangement and maize population in maize-soybean mixture on maize earworm attack was studied at Nsukka, Nigeria for four years, 1997-2000. The treatment consisted of three maize population densities of 40,000, 60,000 and 80,000 plants ha-1, and three row-arrangements of maize: soybean mixtures of 1:1. 1:2 and 1:3 in all possible combinations. There were also three sole crop populations of maize and one of soybean. This resulted in 13 treatments which were laid out in field plots in a Randomized Complete Block Design (RCBD) with three replications. The result showed that intercropping maize and soybean did not reduce maize earworm infestation. Maize population at 80,000 plants ha-1 significantly reduced the infestation by maize earworm and maize cob sizes compared to populations at 40,000 or 60,000 plants ha-1 (P = 0.05). Highly significant positive correlations were established in all the years between earworm population and maize ear sizes. The correlation between damage incidence and severity were inconsistent Land equivalent ratios (LER) at 40,000 and 60,000 maize ha-1 were significantly higher than LER at 80,000 maize ha-1. The differences among the spatial arrangement and its interaction with maize population did not attain any level of statistical significance. . Keywords: Maize earworm, Spatial arrangement, Maize population, Maize-Soybean mixture Agro-Science Vol. 4 (1) 2005: pp. 60-65
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Claims 7
Claim · model-written summary
Intercropping maize and soybean did not reduce maize earworm infestation.
- Treatment
- intercropping maize and soybeane0
- Interactor
- maize earworme0pest
- Outcome
- maize earworm infestatione0
- Direction
- did not reducee0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercropping maize and soybean did not reduce maize earworm infestation.”
Claim · model-written summary
A maize density of 80,000 plants per hectare significantly reduced earworm infestation relative to lower densities.
- Treatment
- 80,000 plants ha-1e0
- Interactor
- maize earworme0pest
- Outcome
- infestation by maize earworme0
- Direction
- reducede0
- Comparator
- 40,000 or 60,000 plants ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize population at 80,000 plants ha-1 significantly reduced the infestation by maize earworm and maize cob sizes compared to populations at 40,000 or 60,000 plants ha-1 (P = 0.05).”
Claim · model-written summary
A maize density of 80,000 plants per hectare significantly reduced cob size relative to lower densities.
- Treatment
- 80,000 plants ha-1e0
- Outcome
- maize cob sizese0
- Direction
- reducede0
- Comparator
- 40,000 or 60,000 plants ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize population at 80,000 plants ha-1 significantly reduced the infestation by maize earworm and maize cob sizes compared to populations at 40,000 or 60,000 plants ha-1 (P = 0.05).”
Claim · model-written summary
Earworm population and maize ear sizes correlated positively in every year.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highly significant positive correlations were established in all the years between earworm population and maize ear sizes.”
Claim · model-written summary
The correlation of damage incidence and severity varied.
- Outcome
- damage incidence and severitye0
Not reportedTaxonInteractorDirection
Verbatim
e0“The correlation between damage incidence and severity were inconsistent”
Claim · model-written summary
Land equivalent ratios at 40,000 and 60,000 maize plants per hectare exceeded those at 80,000.
- Treatment
- 40,000 and 60,000 maize ha-1e0
- Outcome
- Land equivalent ratios (LER)e0
- Direction
- highere0
- Comparator
- 80,000 maize ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Land equivalent ratios (LER) at 40,000 and 60,000 maize ha-1 were significantly higher than LER at 80,000 maize ha-1.”
Claim · model-written summary
Spatial arrangement and its interaction with maize population had no significant differences.
- Outcome
- differences among the spatial arrangement and its interaction with maize populatione0
Not reportedTaxonDirection
Verbatim
e0“The differences among the spatial arrangement and its interaction with maize population did not attain any level of statistical significance.”
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