Abstract
A field experiment was conducted during 2012-13, 2013-14 and 2014-15 at Agricultural Research Station, Darsi, Prakasam district, Andhra Pradesh to evaluate Bt liquid formulations and other biopesticides against gram pod borer, Helicoverpa armigera and spotted pod borer, Maruca vitrata in pigeonpea. There were 10 treatments (2 strains of Bt liquid formulation each at two doses, powdered Bt formulation, two doses of Beauvera bassiana, neem formulation, chemical check) including untreated control. Pooled analysis of three years data revealed that two sprays of chlorpyriphos 0.25% at fortnightly interval was significantly superior over other treatments in suppressing the larval population of H. armigera (av. 0.81 larvae/plant) and M. vitrata (av. 0.80 larvae/ inflorescence) on pigeon pea and recorded minimum pod (5.07%) and seed (3.24 %) damage with maximum 16.9 q/ha yield. It was however, at par with the Bt strain NBAII-BtG4 @ 2% in respect of pod damage (5.30%), seed damage (3.91%) and yield (15.3 q/ha). The Bt strain NBAII-BtG4 @ 2% ranked next best to the insecticidal spray in recording surviving larval population of H. armigera (av. 1.01 larvae / plant) and M. vitrata (av. 1.10 larvae / inflorescence). Moreover, the treatment PDBC-BT1 @ 2% was also found to be equally effective to superior ones. It is therefore biopesticides should be encouraged as eco-friendly insecticides.
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Claims 12
Claim · model-written summary
Chlorpyriphos spray suppressed H. armigera larvae to 0.81 per plant.
- Taxon
- pigeonpea
Cajanus cajant0 - Treatment
- two sprays of chlorpyriphos 0.25%e0
- Interactor
- H. armigera
_gusano_cogollero.png?width=60)
Helicoverpa armigerae0pest - Outcome
- larval population of H. armigerae0
- Direction
- suppressinge0
- Value
- 0.81 larvae/plante0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_gusano_cogollero.png?width=500)
Verbatim
e0“two sprays of chlorpyriphos 0.25% at fortnightly interval was significantly superior over other treatments in suppressing the larval population of H. armigera (av. 0.81 larvae/plant)”
t0“pigeonpea”
Claim · model-written summary
Chlorpyriphos spray suppressed M. vitrata larvae to 0.80 per inflorescence.
- Taxon
- pigeonpeaCajanus cajant0
- Interactor
- M. vitrata
Maruca vitratae0pest - Outcome
- M. vitratae0
- Value
- 0.80 larvae/ inflorescencee0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M. vitrata (av. 0.80 larvae/ inflorescence)”
t0“pigeonpea”
Claim · model-written summary
Chlorpyriphos spray produced minimum pod damage of 5.07%.
- Taxon
- pigeonpeaCajanus cajant0
- Outcome
- pode0
- Direction
- minimume0
- Value
- 5.07%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“minimum pod (5.07%) and seed (3.24 %) damage with maximum 16.9 q/ha yield”
t0“pigeonpea”
Claim · model-written summary
Chlorpyriphos spray produced minimum seed damage of 3.24%.
- Taxon
- pigeonpeaCajanus cajant0
- Outcome
- seede0
- Direction
- minimume0
- Value
- 3.24 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“minimum pod (5.07%) and seed (3.24 %) damage with maximum 16.9 q/ha yield”
t0“pigeonpea”
Claim · model-written summary
Chlorpyriphos spray produced maximum yield of 16.9 q/ha.
- Taxon
- pigeonpeaCajanus cajant0
- Outcome
- yielde0
- Direction
- maximume0
- Value
- 16.9 q/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum 16.9 q/ha yield”
t0“pigeonpea”
Claim · model-written summary
Bt strain NBAII-BtG4 at 2% was at par with insecticide for pod damage of 5.30%.
Not reportedTaxonComparatorDirection
Verbatim
e0“at par with the Bt strain NBAII-BtG4 @ 2% in respect of pod damage (5.30%)”
Claim · model-written summary
Bt strain NBAII-BtG4 at 2% was at par for seed damage of 3.91%.
- Taxon
- pigeonpeaCajanus cajant0
- Outcome
- seed damagee0
- Value
- 3.91%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed damage (3.91%)”
t0“pigeonpea”
Claim · model-written summary
Bt strain NBAII-BtG4 at 2% was at par for yield of 15.3 q/ha.
- Taxon
- pigeonpeaCajanus cajant0
- Outcome
- yielde0
- Value
- 15.3 q/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield (15.3 q/ha)”
t0“pigeonpea”
Claim · model-written summary
Bt strain NBAII-BtG4 at 2% left 1.01 H. armigera larvae per plant.
- Taxon
- pigeonpeaCajanus cajant0
- Interactor
- H. armigeraHelicoverpa armigerae0pest
- Outcome
- surviving larval population of H. armigerae0
- Value
- 1.01 larvae / plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surviving larval population of H. armigera (av. 1.01 larvae / plant)”
t0“pigeonpea”
Claim · model-written summary
Bt strain NBAII-BtG4 at 2% left 1.10 M. vitrata larvae per inflorescence.
- Taxon
- pigeonpeaCajanus cajant0
- Interactor
- M. vitrataMaruca vitratae0pest
- Outcome
- M. vitratae0
- Value
- 1.10 larvae / inflorescencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M. vitrata (av. 1.10 larvae / inflorescence)”
t0“pigeonpea”
Claim · model-written summary
PDBC-BT1 at 2% was equally effective as the superior treatments.
- Taxon
- pigeonpeaCajanus cajant0
- Treatment
- PDBC-BT1 @ 2%e0
- Outcome
- equally effectivee0
- Direction
- equally effectivee0
- Comparator
- superior onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment PDBC-BT1 @ 2% was also found to be equally effective to superior ones”
t0“pigeonpea”
Claim · model-written summary
The authors recommend encouraging biopesticides as eco-friendly insecticides.
- Taxon
- pigeonpeaCajanus cajant0
- Outcome
- biopesticides should be encouraged as eco-friendly insecticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biopesticides should be encouraged as eco-friendly insecticides”
t0“pigeonpea”
The same questions in other papers
chlorpyrifos · Helicoverpa armigera · Cajanus cajan (pigeon pea)Results agree
1 paper in the same direction as this paper
- positive
application · Helicoverpa armigera · Cajanus cajan (pigeon pea)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 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.