Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell)
A trial under laboratory conditions was carried out to study the possibility of decreasing the delivered dose of organophosphate insecticides without affecting their efficacy against California red scale (CRS). Aonidiella aurantii (Maskell), by reducing the volume of water used whilst maintaining th...
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| Format: | Artículo |
| Language: | Inglés |
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2017
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| Online Access: | http://hdl.handle.net/20.500.11939/5237 https://www.sciencedirect.com/science/article/abs/pii/S0261219411000627?via%3Dihub |
| _version_ | 1855491890095325184 |
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| author | Garcerá, Cruz Moltó, Enrique Chueca, Patricia |
| author_browse | Chueca, Patricia Garcerá, Cruz Moltó, Enrique |
| author_facet | Garcerá, Cruz Moltó, Enrique Chueca, Patricia |
| author_sort | Garcerá, Cruz |
| collection | ReDivia |
| description | A trial under laboratory conditions was carried out to study the possibility of decreasing the delivered dose of organophosphate insecticides without affecting their efficacy against California red scale (CRS). Aonidiella aurantii (Maskell), by reducing the volume of water used whilst maintaining the concentration of pesticide. In order to establish an optimal application volume, the coverage and the efficacy against different stages of development of CRS of two commercial organophosphate pesticides (chlorpyrifos 750 g kg(-1) WG [Dursban (R) 75 WG] and chlorpyrifos-methyl 224 g l(-1) EC [Reldan (R) E]) at four volumes of water (1, 2, 3 and 4 ml) were compared. Results showed that in general Chlorpyrifos-methyl-based product (CMBP) provided greater coverage and impact size, but did not achieve the highest efficacy. The minimum-deposited volume (1.01 mu l/cm(2)) produced 11% coverage with Chlorpyrifos-based product (CBP) and 22% with CMBP, reaching the highest efficacies (around 89-95%) against the youngest stages (N1 and N2 stages) with both products. To attain similar efficacy with males (prepupal and pupa stages), twice the volume (2.03 mu l/cm(2)) of the CBP was required, producing 28% coverage. The CMBP required higher deposited volumes (3.41 mu l/cm(2)) and higher coverage (51%). The maximum efficacy in the control of adult females (third instar and gravid female stages) was 70% with both pesticides. This level was attained with 3.41 mu l/cm(2) of CBP (36% coverage) and 4.72 mu l/cm(2) of CMBP (62% coverage). The research shows that greater coverage does not result in greater efficacy, so it would be possible to reduce the spray volume in field conditions. Further research will be carried out in order to check these results under real field conditions. |
| format | Artículo |
| id | ReDivia5237 |
| institution | Instituto Valenciano de Investigaciones Agrarias (IVIA) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | ReDivia52372025-04-25T14:45:44Z Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) Garcerá, Cruz Moltó, Enrique Chueca, Patricia Efficacy Deposition Bioassay Chlorpyrifos-methyl A trial under laboratory conditions was carried out to study the possibility of decreasing the delivered dose of organophosphate insecticides without affecting their efficacy against California red scale (CRS). Aonidiella aurantii (Maskell), by reducing the volume of water used whilst maintaining the concentration of pesticide. In order to establish an optimal application volume, the coverage and the efficacy against different stages of development of CRS of two commercial organophosphate pesticides (chlorpyrifos 750 g kg(-1) WG [Dursban (R) 75 WG] and chlorpyrifos-methyl 224 g l(-1) EC [Reldan (R) E]) at four volumes of water (1, 2, 3 and 4 ml) were compared. Results showed that in general Chlorpyrifos-methyl-based product (CMBP) provided greater coverage and impact size, but did not achieve the highest efficacy. The minimum-deposited volume (1.01 mu l/cm(2)) produced 11% coverage with Chlorpyrifos-based product (CBP) and 22% with CMBP, reaching the highest efficacies (around 89-95%) against the youngest stages (N1 and N2 stages) with both products. To attain similar efficacy with males (prepupal and pupa stages), twice the volume (2.03 mu l/cm(2)) of the CBP was required, producing 28% coverage. The CMBP required higher deposited volumes (3.41 mu l/cm(2)) and higher coverage (51%). The maximum efficacy in the control of adult females (third instar and gravid female stages) was 70% with both pesticides. This level was attained with 3.41 mu l/cm(2) of CBP (36% coverage) and 4.72 mu l/cm(2) of CMBP (62% coverage). The research shows that greater coverage does not result in greater efficacy, so it would be possible to reduce the spray volume in field conditions. Further research will be carried out in order to check these results under real field conditions. 2017-06-01T10:11:56Z 2017-06-01T10:11:56Z 2011 JUN 2011 article acceptedVersion Garcerá, C., Moltó, E., Chueca, P. (2011). Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell). Crop Protection, 30(6), 693-697. 0261-2194 http://hdl.handle.net/20.500.11939/5237 10.1016/j.cropro.2011.02.019 https://www.sciencedirect.com/science/article/abs/pii/S0261219411000627?via%3Dihub en openAccess Impreso |
| spellingShingle | Efficacy Deposition Bioassay Chlorpyrifos-methyl Garcerá, Cruz Moltó, Enrique Chueca, Patricia Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) |
| title | Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) |
| title_full | Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) |
| title_fullStr | Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) |
| title_full_unstemmed | Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) |
| title_short | Effect of spray volume of two organophosphate pesticides on coverage and on mortality of California red scale Aonidiella aurantii (Maskell) |
| title_sort | effect of spray volume of two organophosphate pesticides on coverage and on mortality of california red scale aonidiella aurantii maskell |
| topic | Efficacy Deposition Bioassay Chlorpyrifos-methyl |
| url | http://hdl.handle.net/20.500.11939/5237 https://www.sciencedirect.com/science/article/abs/pii/S0261219411000627?via%3Dihub |
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