Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity
Significant crop losses are due to plant-parasitic nematodes. Nematicides are expensive and potentially toxic to men, the environment, and plants. This study evaluated the hidden phytotoxicity effects of nematicides in soybeans. Two soybean cultivars (8473RSF and M7198IPRO) were evaluated with five...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | AgriEngineering |
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| Online Access: | https://www.mdpi.com/2624-7402/5/4/107 |
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| author | Ernane Miranda Lemes Maria Amélia dos Santos Lísias Coelho Samuel Lacerda de Andrade Aline dos Santos Oliveira Igor Diniz Pessoa João Paulo Arantes Rodrigues Cunha |
| author_facet | Ernane Miranda Lemes Maria Amélia dos Santos Lísias Coelho Samuel Lacerda de Andrade Aline dos Santos Oliveira Igor Diniz Pessoa João Paulo Arantes Rodrigues Cunha |
| author_sort | Ernane Miranda Lemes |
| collection | DOAJ |
| description | Significant crop losses are due to plant-parasitic nematodes. Nematicides are expensive and potentially toxic to men, the environment, and plants. This study evaluated the hidden phytotoxicity effects of nematicides in soybeans. Two soybean cultivars (8473RSF and M7198IPRO) were evaluated with five nematicide treatments (biological, cadusaphos, abamectin, fluensulfone, and an untreated control) for changes in chlorophylls, biometrics, and spectral (TGI visible spectral index captured with a smartphone camera) variables to determine and anticipate the identification of plant stresses. Evaluations occurred 33, 47, and 66 days after sowing (DAS). The <i>a</i>/<i>b</i> chlorophyll proportion was greatest for M7198IPRO and cadusaphos. The chlorophyll variables did not present significant interactions or differences at 47 DAS, indicating that possible nematicide effects were transient and should be evaluated earlier than 33 DAS. Leaf area, leaf mass, and shoot mass were smaller for 8473RSF and outstanding for abamectin and fluensulfone. The response of the spectral index did not present significant interaction among the factors; however, at 33 and 47 DAS, the index was low for 8473RSF and lowest for cadusaphos only at 33 DAS. The correlations between the spectral index and other variables were significant and moderate for soybean total leaf area. Although no apparent phytotoxicity symptoms caused by nematicides were observed, the visible vegetation index generated using a smartphone camera can still improve crop management solutions. |
| first_indexed | 2024-03-08T21:04:20Z |
| format | Article |
| id | doaj.art-42ea2d710c494cf59dc25ee493657a15 |
| institution | Directory Open Access Journal |
| issn | 2624-7402 |
| language | English |
| last_indexed | 2024-03-08T21:04:20Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | AgriEngineering |
| spelling | doaj.art-42ea2d710c494cf59dc25ee493657a152023-12-22T13:45:45ZengMDPI AGAgriEngineering2624-74022023-10-01541737175310.3390/agriengineering5040107Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide PhytotoxicityErnane Miranda Lemes0Maria Amélia dos Santos1Lísias Coelho2Samuel Lacerda de Andrade3Aline dos Santos Oliveira4Igor Diniz Pessoa5João Paulo Arantes Rodrigues Cunha6Institute of Agricultural Sciences (ICIAG), Federal University of Uberlândia (UFU), Uberlândia 38400-902, BrazilInstitute of Agricultural Sciences (ICIAG), Federal University of Uberlândia (UFU), Uberlândia 38400-902, BrazilInstitute of Agricultural Sciences (ICIAG), Federal University of Uberlândia (UFU), Uberlândia 38400-902, BrazilInstitute of Geography (IG), Federal University of Uberlândia (UFU), Monte Carmelo 38500-000, BrazilInstitute of Agricultural Sciences (ICIAG), Federal University of Uberlândia (UFU), Uberlândia 38400-902, BrazilInstitute of Agricultural Sciences (ICIAG), Federal University of Uberlândia (UFU), Uberlândia 38400-902, BrazilInstitute of Agricultural Sciences (ICIAG), Federal University of Uberlândia (UFU), Uberlândia 38400-902, BrazilSignificant crop losses are due to plant-parasitic nematodes. Nematicides are expensive and potentially toxic to men, the environment, and plants. This study evaluated the hidden phytotoxicity effects of nematicides in soybeans. Two soybean cultivars (8473RSF and M7198IPRO) were evaluated with five nematicide treatments (biological, cadusaphos, abamectin, fluensulfone, and an untreated control) for changes in chlorophylls, biometrics, and spectral (TGI visible spectral index captured with a smartphone camera) variables to determine and anticipate the identification of plant stresses. Evaluations occurred 33, 47, and 66 days after sowing (DAS). The <i>a</i>/<i>b</i> chlorophyll proportion was greatest for M7198IPRO and cadusaphos. The chlorophyll variables did not present significant interactions or differences at 47 DAS, indicating that possible nematicide effects were transient and should be evaluated earlier than 33 DAS. Leaf area, leaf mass, and shoot mass were smaller for 8473RSF and outstanding for abamectin and fluensulfone. The response of the spectral index did not present significant interaction among the factors; however, at 33 and 47 DAS, the index was low for 8473RSF and lowest for cadusaphos only at 33 DAS. The correlations between the spectral index and other variables were significant and moderate for soybean total leaf area. Although no apparent phytotoxicity symptoms caused by nematicides were observed, the visible vegetation index generated using a smartphone camera can still improve crop management solutions.https://www.mdpi.com/2624-7402/5/4/107<i>Glycine max</i>smartphone cameratriangular greenness indexchlorophyllsleaf areadry biomass |
| spellingShingle | Ernane Miranda Lemes Maria Amélia dos Santos Lísias Coelho Samuel Lacerda de Andrade Aline dos Santos Oliveira Igor Diniz Pessoa João Paulo Arantes Rodrigues Cunha Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity AgriEngineering <i>Glycine max</i> smartphone camera triangular greenness index chlorophylls leaf area dry biomass |
| title | Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity |
| title_full | Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity |
| title_fullStr | Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity |
| title_full_unstemmed | Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity |
| title_short | Use of Visible Spectral Index and Soybean Plant Variables to Study Hidden Nematicide Phytotoxicity |
| title_sort | use of visible spectral index and soybean plant variables to study hidden nematicide phytotoxicity |
| topic | <i>Glycine max</i> smartphone camera triangular greenness index chlorophylls leaf area dry biomass |
| url | https://www.mdpi.com/2624-7402/5/4/107 |
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