Abstract
Fine powders of orange peel (Citrus sinensis), scent leaf (Ocimum gratissimum), morinda leaf (Morinda lucida) and lemongrass (Cymbopogon citratus) were applied against 2-day-old maize weevils, Sitophilus zeamais with a view to identifying non-chemical control agent(s) of the weevils. Growth rate, antioviposition effect, repelling efficacy and mortality due to each powder were determined. It took an average of 35.4 days for weevils to develop from egg to adult and none of the powders had adverse effect on growth rate. The powders repelled maize weevils significantly, being strongest in C. citratus. However, M. lucida did not achieve an effective antioviposition effect like the other three plants. Percent weevil mortality was higher in maize grains treated with C. citratus and M. lucida within the first one week of application but the effect remained stronger in the former beyond this period. The plant materials, especially C. citratus, showed potential for protecting maize grains against the storage pest.
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Claims 9
Claim · model-written summary
Weevils developed from egg to adult in an average of 35.4 days.
- Interactor
- Sitophilus zeamais
Sitophilus zeamaist0pest - Outcome
- weevils to develop from egg to adulte0
- Value
- 35.4 dayse0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It took an average of 35.4 days for weevils to develop from egg to adult”
t0“maize weevil, Sitophilus zeamais”
Claim · model-written summary
None of the powders adversely affected weevil growth rate.
- Treatment
- powderse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- growth ratee0
- Direction
- nonee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“none of the powders had adverse effect on growth rate”
t0“maize weevil, Sitophilus zeamais”
Claim · model-written summary
The powders significantly repelled maize weevils.
- Treatment
- powderse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- repelled maize weevilse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The powders repelled maize weevils significantly”
t0“Sitophilus zeamais”
t1“maize”
Claim · model-written summary
C. citratus powder was the strongest repellent.
- Treatment
- C. citratuse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- strongeste0
- Direction
- strongeste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“being strongest in C. citratus”
t0“maize weevil, Sitophilus zeamais”
Claim · model-written summary
M. lucida lacked effective antioviposition action relative to the other powders.
- Treatment
- M. lucidae0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- antioviposition effecte0
- Direction
- did not achievee0
- Comparator
- other three plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M. lucida did not achieve an effective antioviposition effect like the other three plants”
t0“maize weevil, Sitophilus zeamais”
Claim · model-written summary
C. citratus treated maize had higher weevil mortality in the first week.
- Treatment
- C. citratuse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- Percent weevil mortalitye0
- Direction
- highere0
- Qualifier
- within the first one week of applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percent weevil mortality was higher in maize grains treated with C. citratus and M. lucida within the first one week of application”
t0“Sitophilus zeamais”
Claim · model-written summary
M. lucida treated maize had higher weevil mortality in the first week.
- Treatment
- M. lucidae0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- Percent weevil mortalitye0
- Direction
- highere0
- Qualifier
- within the first one week of applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percent weevil mortality was higher in maize grains treated with C. citratus and M. lucida within the first one week of application”
t0“Sitophilus zeamais”
Claim · model-written summary
C. citratus retained stronger mortality action beyond the first week.
- Treatment
- C. citratust1
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- effecte0
- Direction
- strongere0
- Qualifier
- beyond this periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect remained stronger in the former beyond this period”
t0“maize weevil, Sitophilus zeamais”
t1“treated with C. citratus and M. lucida within the first one week of application”
Claim · model-written summary
The authors identify plant materials, especially C. citratus, as potential protectants for maize grains.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plant materials, especially C. citratus, showed potential for protecting maize grains against the storage pest”
The same questions in other papers
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.