Abstract
Sitophilus zeamais is considered one of the most important pests of stored grain. In order to search alternative methods for controlling this pest the action of neem was evaluated in laboratory (Azadirachta indica A. juss.) in the behavioral and food processes of adults of S. zeamais. In this study extracts produced from three parts of the neem tree (leaves, seeds and peels) were tested. In the verification of the extracts in relation to the repellent, three arenas formed by five plastic boxes connected by polyethylene hose were used. In the test were used 40g of corn treated with 6g of the extracts from leaves, seeds and peels of neem. The verification of the effect of the extracts studied was based on the number of present insects on the test plant (treated containers), and on the number of insects present on the control plant (untreated container). In the repellency analysis, leaves and seeds showed satisfactory results, with repellency indexes (RI) equals to 0.5 and 0.3, respectively, being characterized as repellent plant. The repellency index of the peel extract was 1.1, qualifying the plant as attractive one, to present RI > 1. Therefore, the leaves and seed extracts from neem can be considered as a viable alternative for controlling the Sitophilus zeamais in stored corn. DOI: http://dx.doi.org/10.14685/rebrapa.v1i1.4
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Claims 4
Claim · model-written summary
Neem leaf extract repelled S. zeamais in stored corn with RI 0.5.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- leavese0
- Interactor
- Sitophilus zeamais
Sitophilus zeamaist0pest - Outcome
- repellency indexese0
- Direction
- repellente0
- Value
- 0.5e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaves and seeds showed satisfactory results, with repellency indexes (RI) equals to 0.5 and 0.3, respectively, being characterized as repellent plant”
t0“Sitophilus zeamais (Coleoptera: Curculionidae) in stored corn”
Claim · model-written summary
Neem seed extract repelled S. zeamais in stored corn with RI 0.3.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- seedse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- repellency indexese0
- Direction
- repellente0
- Value
- 0.3e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaves and seeds showed satisfactory results, with repellency indexes (RI) equals to 0.5 and 0.3, respectively, being characterized as repellent plant”
t0“Sitophilus zeamais (Coleoptera: Curculionidae) in stored corn”
Claim · model-written summary
Neem peel extract attracted the stored corn pest, with RI 1.1.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- peel extracte0
- Interactor
- Sitophilus zeamaisSitophilus zeamaist0pest
- Outcome
- repellency indexe0
- Direction
- attractivee0
- Value
- 1.1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The repellency index of the peel extract was 1.1, qualifying the plant as attractive one, to present RI > 1”
t0“Sitophilus zeamais (Coleoptera: Curculionidae) in stored corn”
Claim · model-written summary
The authors consider neem leaf and seed extracts a viable control option for S. zeamais in stored corn.
- Taxon
- cornZea mays subsp. mayse0
- Interactor
- Sitophilus zeamaisSitophilus zeamaise0pest
- Outcome
- viable alternative for controlling the Sitophilus zeamaise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaves and seed extracts from neem can be considered as a viable alternative for controlling the Sitophilus zeamais in stored corn”
The same questions in other papers
botanical · Sitophilus zeamais · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 113 in the opposite direction
- positive
- positive
- positive
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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.