Abstract
Sitophilus zeamais and Prostephanus truncatus can cause weight loss of about 20 to 90% of untreated stored maize seeds. This study assesses four plants (Lantana camara, Moringa oleifera, Citrus sinensis and Hyptis suaveolens) extracts as seed maize protectants against the two insects in Ghana. The study was laid out in a CRD with three replications. Dried powders (5 and 10% w/w) and aqueous extracts (0.05 and 0.1 g/mL) of the botanicals were evaluated for their insecticidal activity with untreated control and Actellic included as checks. Oviposition and survivorship of insects decreased in grains treated with plant extracts. The phytochemical analysis revealed that compounds such as alkaloids, saponins, tannins and phenolic, steroids, flavonoids, anthraquinones, phlobatannins, cardiac glycosides and terpenoids were recorded in all four plant extracts. These compounds may have caused lower progeny emergence, inhibitory effect, repellent action and antifeedant effect to S. zeamais and P. truncatus in grains treated with the botanicals. Maize seeds treated with botanicals after 10 weeks in cribs recorded a reduction in the percentage of seeds damaged and weight loss caused by the two insects compared to the untreated seeds. The study proposes that the botanicals tested, especially H. suaveolens have the potential to enhance quality seed production thereby boosting growth in the seed industry. The botanicals are recommended for use by seed producers and farmers to control P. truncatus and S. zeamais in stored maize seeds.
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Claims 6
Claim · model-written summary
Plant extracts reduced insect oviposition in treated maize grain.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oviposition and survivorship of insects decreased in grains treated with plant extracts.”
t0“maize”
Claim · model-written summary
Plant extracts reduced insect survivorship in treated maize grain.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oviposition and survivorship of insects decreased in grains treated with plant extracts.”
t0“maize”
Claim · model-written summary
All four plant extracts contained multiple classes of phytochemicals.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compounds such as alkaloids, saponins, tannins and phenolic, steroids, flavonoids, anthraquinones, phlobatannins, cardiac glycosides and terpenoids were recorded in all four plant extracts.”
t0“maize”
Claim · model-written summary
Botanical treatment reduced stored maize seed damage after ten weeks relative to untreated seeds.
- Treatment
- botanicalse0
- Outcome
- percentage of seeds damagede0
- Direction
- reductione0
- Qualifier
- after 10 weeks in cribse0
- Comparator
- untreated seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize seeds treated with botanicals after 10 weeks in cribs recorded a reduction in the percentage of seeds damaged and weight loss caused by the two insects compared to the untreated seeds.”
t0“maize”
Claim · model-written summary
Botanical treatment reduced stored maize seed weight loss after ten weeks relative to untreated seeds.
- Treatment
- botanicalse0
- Outcome
- weight losse0
- Direction
- reductione0
- Qualifier
- after 10 weeks in cribse0
- Comparator
- untreated seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize seeds treated with botanicals after 10 weeks in cribs recorded a reduction in the percentage of seeds damaged and weight loss caused by the two insects compared to the untreated seeds.”
t0“maize”
Claim · model-written summary
The authors recommend botanicals to control stored-maize seed pests.
- Outcome
- botanicals are recommended for use by seed producers and farmerse0
- Qualifier
- to control P. truncatus and S. zeamaise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The botanicals are recommended for use by seed producers and farmers to control P. truncatus and S. zeamais in stored maize seeds.”
t0“maize”
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