Abstract
Abstract Although neem ( Azadirachta indica ) and rosemary ( Rosmarinus officinalis ) oils have repellent properties against stored grain insects, their effectiveness is limited due to their volatility and sensitivity to heat and light, which causes them to be released from grains quickly. In this study, a bioinsecticide was formulated by impregnating optimally silica, derived from rice husk ash, with mechanically extracted oil from neem and hydro-distilled rosemary. The resulting formulation was tested for its ability to control Sitophilus zeamais (Motschulsky) during storage of maize grain. The silica, which had some surface functional groups, controlled the populations of S. zeamais in stored maize grains within 12 days of exposure. Compounding the silica with neem and rosemary oils further maintained these functional groups and produced a synergistic effect in controlling the pests in stored maize grains. These results were only comparable to those obtained with the use of synthetic pesticides after 5 days of application. The results indicate that the inert surface functional groups caused the cuticles of the insect pests to dehydrate, ultimately leading to their death. Overall, silica derived from rice husk ash and impregnated with neem and rosemary oils could be a promising alternative to synthetic pesticides for storing maize grains, as it retained more than 85% of their germinative capacity even after prolonged storage.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Rice-husk-derived silica controlled populations of S. zeamais in stored maize grains within 12 days of exposure.
- Treatment
- silicae0
- Interactor
- S. zeamais
Sitophilus zeamaise0pest - Outcome
- populations of S. zeamaise0
- Direction
- controllede0
- Qualifier
- within 12 days of exposuree0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The silica, which had some surface functional groups, controlled the populations of S. zeamais in stored maize grains within 12 days of exposure”
Claim · model-written summary
Compounding the silica with neem and rosemary oils produced a synergistic effect in controlling pests in stored maize grains.
- Treatment
- neem and rosemary oilse0
- Outcome
- controlling the pestse0
- Direction
- synergistice0
- Comparator
- silicae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compounding the silica with neem and rosemary oils further maintained these functional groups and produced a synergistic effect in controlling the pests in stored maize grains”
Claim · model-written summary
The effect of the formulation on stored maize pests was only comparable to synthetic pesticides after 5 days of application.
- Outcome
- only comparablee0
- Direction
- comparablee0
- Qualifier
- after 5 days of applicatione0
- Comparator
- synthetic pesticidese0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stored maize”
e0“These results were only comparable to those obtained with the use of synthetic pesticides after 5 days of application”
Claim · model-written summary
The authors attribute pest death to inert surface functional groups dehydrating the cuticles of the insect pests.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“stored maize”
e0“the inert surface functional groups caused the cuticles of the insect pests to dehydrate, ultimately leading to their death”
Claim · model-written summary
Silica derived from rice husk ash and impregnated with neem and rosemary oils retained more than 85% of the germinative capacity of stored maize grains even after prolonged storage.
- Treatment
- silica derived from rice husk ash and impregnated with neem and rosemary oilse0
- Outcome
- germinative capacitye0
- Direction
- retainede0
- Value
- more than 85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silica derived from rice husk ash and impregnated with neem and rosemary oils could be a promising alternative to synthetic pesticides for storing maize grains, as it retained more than 85% of their germinative capacity even after prolonged storage”
Claim · model-written summary
The authors propose the oil-impregnated rice husk silica as a promising alternative to synthetic pesticides for storing maize grains.
- Outcome
- promising alternative to synthetic pesticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“silica derived from rice husk ash and impregnated with neem and rosemary oils could be a promising alternative to synthetic pesticides for storing maize grains, as it retained more than 85% of their germinative capacity even after prolonged storage”
The same questions in other papers
Salvia rosmarinus · growth · Zea mays (maize)Positive and negative results
1 in the opposite direction
- no effect
Oryza sativa · growth · Zea mays (maize)Positive and negative results
30 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
31 papers more in this group
See all 35 papers →silicon dioxide · Sitophilus zeamais · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
Salvia rosmarinus · pest · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
silicon dioxide · growth · Zea mays (maize)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →botanical · pest · Zea mays (maize)Positive and negative results
77 papers in the same direction as this paper · 12 in the opposite direction
- negative
- negative
- negative
86 papers more in this group
See all 90 papers →botanical · growth · Zea mays (maize)Positive and negative results
197 papers in the same direction as this paper · 140 in the opposite direction · 2 reporting no difference from an alternative
- negative
- negative
- no effect
336 papers more in this group
See all 340 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.