Abstract
The population of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) and its damage to pod/seed in pigeonpea was monitored upon treatment with formulated neem seed oil (F-NSO) and synthetic pyrethroid-cypermethrin. The experiment was conducted at the Postgraduate Teaching and Research Farm, Department of Crop Science and Technology, Federal University of Technology, Owerri, beginning from May 2009, repeated in May 2010 and July 2010. The experiment was laid out in 5 × 3 factorial comprising three rates of neem seed oil, 4.2 ℓ ha−1, 8.3 ℓ ha−1, 12.5 ℓ ha−1 with untreated control (0ℓ ha−1), and synthetic pyrethroid-cypermethrin 1.5 ℓ ha−1 as check plots and three intervals of application: once a week, once in two weeks, and once in three weeks. Results revealed that application of F-NSO at highest dose of 12.5 ℓ ha-1 and at four regime spraying intervals of once a week significantly reduced the population resulting in reduced pod and seed damage irrespective of the planting seasons. However, applying the control measure during July planting season when the population of the H. armigera was the most minimal further enhanced the performance of the early maturing pigeonpea cultivar based on the better seed quality obtained (% wholesome seeds) compared with that of May planting season.
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Claims 5
Claim · model-written summary
Weekly 12.5 ℓ ha-1 neem oil significantly reduced Helicoverpa armigera population across seasons.
- Taxon
- pigeonpea
Cajanus cajant0 - Treatment
- F-NSO at highest dose of 12.5 ℓ ha-1e0
- Interactor
- Helicoverpa armigera
_gusano_cogollero.png?width=60)
Helicoverpa armigerat0pest - Outcome
- populatione0
- Direction
- reducede0
- Qualifier
- once a weeke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_gusano_cogollero.png?width=500)
Verbatim
e0“application of F-NSO at highest dose of 12.5 ℓ ha-1 and at four regime spraying intervals of once a week significantly reduced the population resulting in reduced pod and seed damage irrespective of the planting seasons.”
t0“Helicoverpa armigera on pigeonpea”
Claim · model-written summary
Weekly 12.5 ℓ ha-1 neem oil reduced pigeonpea pod damage.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- F-NSO at highest dose of 12.5 ℓ ha-1e0
- Interactor
- Helicoverpa armigeraHelicoverpa armigerat0pest
- Outcome
- pod and seed damagee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of F-NSO at highest dose of 12.5 ℓ ha-1 and at four regime spraying intervals of once a week significantly reduced the population resulting in reduced pod and seed damage irrespective of the planting seasons.”
t0“Helicoverpa armigera on pigeonpea”
Claim · model-written summary
Weekly 12.5 ℓ ha-1 neem oil reduced pigeonpea seed damage.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- F-NSO at highest dose of 12.5 ℓ ha-1e0
- Interactor
- Helicoverpa armigeraHelicoverpa armigerat0pest
- Outcome
- seed damagee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of F-NSO at highest dose of 12.5 ℓ ha-1 and at four regime spraying intervals of once a week significantly reduced the population resulting in reduced pod and seed damage irrespective of the planting seasons.”
t0“Helicoverpa armigera on pigeonpea”
Claim · model-written summary
Helicoverpa armigera population was lowest in the July planting season.
- Taxon
- pigeonpeaCajanus cajant0
- Interactor
- H. armigeraHelicoverpa armigerae0pest
- Outcome
- population of the H. armigerae0
- Direction
- most minimale0
- Qualifier
- July planting seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during July planting season when the population of the H. armigera was the most minimal”
t0“pigeonpea”
Claim · model-written summary
Control during July planting produced better wholesome seed quality than May planting.
- Taxon
- pigeonpeaCajanus cajane0
- Treatment
- control measuree0
- Interactor
- H. armigeraHelicoverpa armigerae0pest
- Outcome
- seed quality obtained (% wholesome seeds)e0
- Direction
- bettere0
- Comparator
- May planting seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying the control measure during July planting season when the population of the H. armigera was the most minimal further enhanced the performance of the early maturing pigeonpea cultivar based on the better seed quality obtained (% wholesome seeds) compared with that of May planting season.”
The same questions in other papers
botanical · Helicoverpa armigera · Cajanus cajan (pigeon pea)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
5 papers more in this group
See all 9 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.