Abstract
Five botanical fine dusts, ash and sulfur powders were tested for their biological performance activity against the rice weevil Sitophilus oryza. Their toxicities and delayed effect on the treated insect were determined. The insect was exposed to treated rice grain with each of the evaluated materials and bioassayed for different intervals extended form 3 to 30 days. The insecticidal activity was expressed in terms of the adult insects-mortality due to the contact with the tested materials. The effect of these materials on the inspected damage in rice grains and/or resulted F1 progeny post-treatment had been investigated and expressed in terms of productivity inhibition percentage (PIP). The complete control of treated insects (100% kill) was recorded at the doses of 0.25 and 0.5 g of black pepper fine dust/50 g rice grains after 21 and 14 days post exposure, consequently. Furthermore, at the higher dose of 0.5 g material/50 g rice grains, camphor and black pepper pronounced complete control of the exposed adult-insects giving 100% kill after an exposure period of 30 days, while Latania fine dust was the least efficient tested material. The results were also confirmed by the deduced dependent positive strong relationship between the recorded insect mortality and the time needed to cause 50 % kill of the exposed insects (LT50) at all the different used doses.Based onLT50 values, the superior insecticidal effect was recorded for black pepper, followed by orange peel, then camphor and the other tested materials. Meanwhile, clove and Lataniafine dusts were the leastefficient materials at all used doses (w/w). The results proved that camphor fine dust was the most potent material in preventing grains perforation and reducing the damage that can be caused by the adult-weevils of S. oryzae followed by black pepper fine dust. Although, the clove fine dust was less toxic, it showed a potent delayed and completely inhibited the raise of F1 progeny post-parents treatment (100%) at its higher tested dose of 0.5 g powder /50 g rice. There was also a good correlation between the insecticidal activity of black pepper fine dust, either picked up or contacted the exposed insects and its effect on prevention or reduction of grains damage and/or its ability in suppressing the raised individuals of F1 progeny.
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Claims 9
Claim · model-written summary
Black pepper dust at 0.25 g per 50 g rice killed all exposed insects after 21 days.
- Taxon
- rice
Oryza sativae0 - Treatment
- 0.25e0
- Outcome
- treated insectse0
- Direction
- complete controle0
- Value
- 100% kille0
Not reportedInteractorComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The complete control of treated insects (100% kill) was recorded at the doses of 0.25 and 0.5 g of black pepper fine dust/50 g rice grains after 21 and 14 days post exposure, consequently.”
Claim · model-written summary
Black pepper dust at 0.5 g per 50 g rice killed all exposed insects after 14 days.
- Taxon
- riceOryza sativae0
- Treatment
- 0.5 g of black pepper fine dust/50 g rice grainse0
- Outcome
- treated insectse0
- Direction
- complete controle0
- Value
- 100% kille0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The complete control of treated insects (100% kill) was recorded at the doses of 0.25 and 0.5 g of black pepper fine dust/50 g rice grains after 21 and 14 days post exposure, consequently.”
Claim · model-written summary
Camphor dust at the higher dose completely controlled exposed adults after 30 days.
- Taxon
- riceOryza sativae0
- Treatment
- camphore0
- Outcome
- exposed adult-insectse0
- Direction
- complete controle0
- Value
- 100% kille0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the higher dose of 0.5 g material/50 g rice grains, camphor and black pepper pronounced complete control of the exposed adult-insects giving 100% kill after an exposure period of 30 days”
Claim · model-written summary
Black pepper dust at the higher dose completely controlled exposed adults after 30 days.
- Taxon
- riceOryza sativae0
- Treatment
- black peppere0
- Outcome
- exposed adult-insectse0
- Direction
- complete controle0
- Value
- 100% kille0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the higher dose of 0.5 g material/50 g rice grains, camphor and black pepper pronounced complete control of the exposed adult-insects giving 100% kill after an exposure period of 30 days”
Claim · model-written summary
Latania dust was the least efficient treatment for adult insect control.
Not reportedTaxon
Verbatim
e0“while Latania fine dust was the least efficient tested material.”
Claim · model-written summary
Black pepper ranked highest in insecticidal effect by LT50.
Not reportedTaxon
Verbatim
e0“Based onLT50 values, the superior insecticidal effect was recorded for black pepper, followed by orange peel, then camphor and the other tested materials.”
Claim · model-written summary
Clove and Latania dusts had the lowest insecticidal efficiency across doses.
Not reportedTaxon
Verbatim
e0“Meanwhile, clove and Lataniafine dusts were the leastefficient materials at all used doses (w/w).”
Claim · model-written summary
Camphor dust best prevented rice grain perforation and weevil damage, followed by black pepper.
- Treatment
- camphor fine duste0
- Interactor
- S. oryzae
Sitophilus oryzaee0pest - Outcome
- grains perforatione0
- Direction
- preventinge0
- Comparator
- black pepper fine duste0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“camphor fine dust was the most potent material in preventing grains perforation and reducing the damage that can be caused by the adult-weevils of S. oryzae followed by black pepper fine dust.”
Claim · model-written summary
Clove dust fully inhibited F1 weevil progeny at its highest dose.
- Taxon
- riceOryza sativae0
- Treatment
- 0.5 g powder /50 g ricee0
- Outcome
- F1 progenye0
- Direction
- completely inhibitede0
- Value
- 100%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the clove fine dust was less toxic, it showed a potent delayed and completely inhibited the raise of F1 progeny post-parents treatment (100%) at its higher tested dose of 0.5 g powder /50 g rice.”
The same questions in other papers
camphor · pest · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
camphor · Sitophilus oryzae · Oryza sativa (rice)Results agree
2 papers in the same direction as this paper
- positive
- positive
botanical · pest · Oryza sativa (rice)Positive and negative results
77 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
82 papers more in this group
See all 86 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.