Abstract
The residual effect of natural insecticides was evaluated on adults of Sitophilus zeamais Mots. (Coleoptera: Curculionidae) on stored corn grains. Clove (Syzygium aromaticum L.), white pepper (Piper nigrum L.), neem (Azadirachta indica A. Juss) and silica dioxide powders were tested as well as neem, eucalyptus (Eucaliptus globulus Labill and Eucaliptus citriodora Hook.), eugenol, andiroba (Carapa guianensis Aubl.), rosemary (Lippia gracillis HBK.), cedar (Cedrela fissilis Vell.) and pequi (Caryocar brasiliense Camb.) oils. Powders were tested at concentration of 1kg/t in 50g-corn-plot and the oils at dosage of 50¿L in 20g-corn-plot. The plots infestation was accomplished using 20 and 8 adults (males and females) of S. zeamais being 0 to 15 days old, respectively, in the experiments with powders and oils. Silica dioxide caused 46.7, 38.3 and 37.5% of mortality, respectively, in the initial (soon after the treatment with the powders or oils) and at 60 and 120 days of storage periods, but the mortality induced by the other powders was inexpressive. In the three studied storage periods, silica dioxide was the more efficient in reducing adults emergency. At the initial storage period, all the oils caused mortality above 79%, however, after 60 and 120 days, mortality was lower than 2.5%. The adult emergency increased as stored period increased, although at 120 days the best performance was obtained using neem, followed by andiroba, cedar, rosemary and E. globulus oils.
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Claims 9
Claim · model-written summary
Silica dioxide caused 46.7% pest mortality initially.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- Silica dioxidee0
- Interactor
- Sitophilus zeamais
Sitophilus zeamaise2pest - Outcome
- mortalitye0
- Direction
- causede0
- Value
- 46.7e0
- Qualifier
- initiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silica dioxide caused 46.7, 38.3 and 37.5% of mortality, respectively, in the initial (soon after the treatment with the powders or oils) and at 60 and 120 days of storage periods”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
Silica dioxide caused 38.3% pest mortality after 60 days.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Silica dioxidee0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- mortalitye0
- Direction
- causede0
- Value
- 38.3e0
- Qualifier
- 60e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silica dioxide caused 46.7, 38.3 and 37.5% of mortality, respectively, in the initial (soon after the treatment with the powders or oils) and at 60 and 120 days of storage periods”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
Silica dioxide caused 37.5% pest mortality after 120 days.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Silica dioxidee0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- mortalitye0
- Direction
- causede0
- Value
- 37.5%e0
- Qualifier
- 120 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Silica dioxide caused 46.7, 38.3 and 37.5% of mortality, respectively, in the initial (soon after the treatment with the powders or oils) and at 60 and 120 days of storage periods”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
Other powders induced little mortality.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- other powderse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- mortalitye0
- Direction
- inexpressivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the mortality induced by the other powders was inexpressive.”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
Silica dioxide was most efficient in reducing adult emergence across three storage periods.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- silica dioxidee0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- adults emergencye0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the three studied storage periods, silica dioxide was the more efficient in reducing adults emergency.”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
All tested oils caused more than 79% pest mortality initially.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- all the oilse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- mortalitye0
- Direction
- abovee0
- Value
- 79%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the initial storage period, all the oils caused mortality above 79%”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
Oil-induced pest mortality was below 2.5% after 60 and 120 days.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- all the oilse1
- Interactor
- Sitophilus zeamaisSitophilus zeamaise3pest
- Outcome
- mortalitye0
- Direction
- lower thane0
- Value
- 2.5%e0
- Qualifier
- after 60 and 120 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after 60 and 120 days, mortality was lower than 2.5%.”
e1“all the oils”
e2“stored corn grains”
e3“Sitophilus zeamais”
Claim · model-written summary
Adult emergence increased with storage duration.
- Taxon
- cornZea mays subsp. mayse1
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- adult emergencye0
- Direction
- increasede0
- Qualifier
- stored period increasede0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The adult emergency increased as stored period increased”
e1“stored corn grains”
e2“Sitophilus zeamais”
Claim · model-written summary
Neem oil performed best at 120 days, followed by andiroba, cedar, rosemary and E. globulus oils.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- neeme0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise2pest
- Outcome
- best performancee0
- Direction
- beste0
- Qualifier
- 120 dayse0
- Comparator
- andiroba, cedar, rosemary and E. globulus oilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 120 days the best performance was obtained using neem, followed by andiroba, cedar, rosemary and E. globulus oils.”
e1“stored corn grains”
e2“Sitophilus zeamais”
The same questions in other papers
silicon dioxide · Sitophilus zeamais · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
botanical · Sitophilus zeamais · Zea mays (maize)Positive and negative results
112 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- no effect
113 papers more in this group
See all 117 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.