Abstract
The ideal time is more important than amount of insecticidal spraying to adequate the control of Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) in corn. This study aimed to evaluate lufenuron sequential sprayings effect and its rotation with other active ingredients on the population, damage caused by S. frugiperda and the impact on corn yield. The experiment was carried out in the field with six treatments: (1) one lufenuron spraying, (2) two lufenuron sprayings, (3) three lufenuron sprayings (4) four lufenuron sprayings, (5) sprayings with spinosad, lufenuron, thiamethoxam+lambdacyhalothrin and deltamethrin (in sequence, at ten days intervals) (6) control treatment. Sprayings started twenty days after the seedling had emerged and then every ten days for a maximum of four sprays. Both caterpillar population (20.9-21.7 larvae/plot) and index of damage (1.2-1.7) observed in corn plants were significantly lower in treated plots compared to control (untreated) (31.7 larvae/plot and index of damage 2.7), regardless of spraying amount. The results showed that multiple insecticide applications to control S. frugiperda do not guarantee higher yields in corn, ranging from 6375.2 to 7650.1 kg ha -1. Only one spraying of lufenuron was enough to prevent significant reduction in corn yield (6749.9 kg ha -1). © 2012 Asian Network for Scientific Information.
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Claims 4
Claim · model-written summary
Caterpillar population of Spodoptera frugiperda in corn was significantly lower in lufenuron-treated plots than in untreated control plots.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- lufenuron sequential sprayingse2
- Interactor
- Spodoptera frugiperda
.jpg?width=60)
Spodoptera frugiperdae0pest - Outcome
- caterpillar populatione1
- Direction
- lowere1
- Value
- 20.9-21.7 larvae/plote1
- Comparator
- control (untreated)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Corn Yield”
e0“control of Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) in corn”
e1“Both caterpillar population (20.9-21.7 larvae/plot) and index of damage (1.2-1.7) observed in corn plants were significantly lower in treated plots compared to control (untreated) (31.7 larvae/plot and index of damage 2.7), regardless of spraying amount”
e2“This study aimed to evaluate lufenuron sequential sprayings effect”
Claim · model-written summary
Index of damage by Spodoptera frugiperda in corn was significantly lower in lufenuron-treated plots than in untreated control plots.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- lufenuron sequential sprayingse2
- Interactor
- Spodoptera frugiperdaSpodoptera frugiperdae0pest
- Outcome
- index of damagee1
- Direction
- lowere1
- Value
- 1.2-1.7e1
- Comparator
- control (untreated)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Yield”
e0“control of Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) in corn”
e1“Both caterpillar population (20.9-21.7 larvae/plot) and index of damage (1.2-1.7) observed in corn plants were significantly lower in treated plots compared to control (untreated) (31.7 larvae/plot and index of damage 2.7), regardless of spraying amount”
e2“This study aimed to evaluate lufenuron sequential sprayings effect”
Claim · model-written summary
Multiple insecticide applications against Spodoptera frugiperda do not guarantee higher corn yields, which ranged from 6375.2 to 7650.1 kg/ha.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- multiple insecticide applicationse3
- Outcome
- yieldse3
- Direction
- do not guarantee highere3
- Value
- 6375.2 to 7650.1 kg ha -1e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Yield”
e3“The results showed that multiple insecticide applications to control S. frugiperda do not guarantee higher yields in corn, ranging from 6375.2 to 7650.1 kg ha -1”
Claim · model-written summary
One lufenuron spraying was enough to prevent a significant reduction in corn yield (6749.9 kg/ha).
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- one spraying of lufenurone4
- Outcome
- corn yielde4
- Direction
- prevent significant reductione4
- Value
- 6749.9 kg ha -1e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Yield”
e4“Only one spraying of lufenuron was enough to prevent significant reduction in corn yield (6749.9 kg ha -1)”
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