Abstract
Maize (Zea mays [L.]) is a major staple food in many regions of the world. The maize weevil Sitophilus zeamais is a serious primary pest of maize in Nigeria. Laboratory investigations were carried out to compare the efficacy of the extracts of Curcuma longa rhizomes and Gnetum africanum leaves for the control of S. zeamais on stored maize grains. Three different solvents namely: petroleum ether, methanol and acetone were used to extract the essential oils from C. longa rhizomes and G. africanum leaves using a soxhlent extractor apparatus. The extracted oils were evaluated on S. zeamais for mortality effect. Weight loss of the maize grains was also assessed. The experiment was laid out in a completely randomized design (CRD) in four replications. The results obtained showed that the essential oil of C. longa extracted with petroleum ether evoked significantly (P ≤ 0.05) higher mortality (90%) in the maize weevil at 42 days after treatment (DAT). It also recorded a significant reduction in percentage weight loss when compared with the control treatments. No mortality was recorded in the control of all solvents and untreated control. C. longa extracted with petroleum ether was very effective in controlling S. zeamais in stored maize grains and can be incorporated for the control of S. zeamais in stored maize grains.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 3
Claim · model-written summary
Petroleum-ether extract of C. longa rhizomes caused significantly higher mortality of the maize weevil at 42 days than the untreated control.
- Treatment
- essential oil of C. longa extracted with petroleum ethere2
- Interactor
- Sitophilus zeamais
Sitophilus zeamaise1pest - Outcome
- mortalitye2
- Direction
- highere2
- Value
- 90%e2
- Qualifier
- at 42 days after treatment (DAT)e2
- Comparator
- untreated controle4
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The maize weevil Sitophilus zeamais is a serious primary pest of maize in Nigeria”
e2“the essential oil of C. longa extracted with petroleum ether evoked significantly (P ≤ 0.05) higher mortality (90%) in the maize weevil at 42 days after treatment (DAT)”
e4“No mortality was recorded in the control of all solvents and untreated control”
Claim · model-written summary
Petroleum-ether extract of C. longa rhizomes significantly reduced percentage weight loss of stored maize grains compared with control treatments.
- Treatment
- essential oil of C. longa extracted with petroleum ethere2
- Interactor
- Sitophilus zeamaisSitophilus zeamaise1pest
- Outcome
- percentage weight losse3
- Direction
- reductione3
- Comparator
- control treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The maize weevil Sitophilus zeamais is a serious primary pest of maize in Nigeria”
e2“the essential oil of C. longa extracted with petroleum ether evoked significantly (P ≤ 0.05) higher mortality (90%) in the maize weevil at 42 days after treatment (DAT)”
e3“It also recorded a significant reduction in percentage weight loss when compared with the control treatments”
Claim · model-written summary
The C. longa extract can be incorporated for control of S. zeamais in stored maize grains.
- Interactor
- S. zeamaisSitophilus zeamaise5pest
- Outcome
- control of S. zeamais in stored maize grainse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“can be incorporated for the control of S. zeamais in stored maize grains”
The same questions in other papers
ether · Sitophilus zeamais · Zea mays (maize)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Curcuma longa · Sitophilus zeamais · Zea mays (maize)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.