Abstract
To find an alternative to environmentally harmful chemical pesticides, the methanolic extracts of Plectranthus glandulosus leaves were evaluated for mortality and F1 offspring production of Sitophilus zeamais. Delvap Super® was applied as a reference insecticide at the recommended dose (0.1 g / kg), while the extracts were used at four doses (5, 10, 20 and 40 g / kg). Adult mortality was recorded daily for 14 days post-treatment. One day after exposure, Delvap Super® killed 100 % of the weevils, and the extracts caused 96.66 % mortality with the highest dose (40 g / kg). The LD50 value in four days was 3.72 g / kg. From the smallest (5 g / kg) to the largest dose (40 g / kg), the extracts significantly reduced the emergence of offspring respectively 43.87 to 100 %. Considering these results, these extracts could be recommended as alternatives to synthetic insecticides against S. zeamais in storage.
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Claims 5
Claim · model-written summary
Delvap Super killed all weevils one day after exposure.
- Treatment
- Delvap Super®e0
- Interactor
- Sitophilus zeamais
Sitophilus zeamaist1pest - Outcome
- weevilse0
- Direction
- killede0
- Value
- 100 %e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“One day after exposure, Delvap Super® killed 100 % of the weevils”
t0“Maize”
t1“Sitophilus zeamais F1 in Maize Protection”
Claim · model-written summary
At 40 g / kg, Plectranthus leaf extracts caused 96.66 % weevil mortality after one day.
- Treatment
- extractse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist1pest
- Outcome
- mortalitye0
- Direction
- causede0
- Value
- 96.66 %e0
- Qualifier
- 40 g / kge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the extracts caused 96.66 % mortality with the highest dose (40 g / kg).”
t0“Maize”
t1“Sitophilus zeamais F1 in Maize Protection”
Claim · model-written summary
Extract LD50 after four days was 3.72 g / kg.
- Interactor
- Sitophilus zeamaisSitophilus zeamaist1pest
- Outcome
- LD50e0
- Value
- 3.72 g / kge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The LD50 value in four days was 3.72 g / kg.”
t0“Maize”
t1“Sitophilus zeamais F1 in Maize Protection”
Claim · model-written summary
Extract doses from 5 to 40 g / kg significantly reduced weevil offspring emergence by 43.87 to 100 %.
- Treatment
- extractse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist1pest
- Outcome
- emergence of offspringe0
- Direction
- reducede0
- Value
- 43.87 to 100 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From the smallest (5 g / kg) to the largest dose (40 g / kg), the extracts significantly reduced the emergence of offspring respectively 43.87 to 100 %.”
t0“Maize”
t1“Sitophilus zeamais F1 in Maize Protection”
Claim · model-written summary
The authors recommend the extracts as alternatives to synthetic insecticides for stored maize weevil control.
- Interactor
- S. zeamaisSitophilus zeamaise0pest
- Outcome
- alternatives to synthetic insecticidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these extracts could be recommended as alternatives to synthetic insecticides against S. zeamais in storage.”
t0“Maize”
t1“Sitophilus zeamais F1 in Maize Protection”
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.