Addition of mancozeb to the fungicide mixtures DMI + QoI and SDHI + QoI on the control of wheat leaf blights
Wheat leaf blights caused by Drechslera siccans, D. tritici-repentis, especially D. tritici-repentis, are difficult to be controlled by site-specific fungicide mixtures. Due to development of resistance, the use of double site-specific mixtures has shown control inferior to 50%. In an experiment con...
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| Acceso en línea: | http://ri.agro.uba.ar/files/download/articulo/2019reis.pdf LINK AL EDITOR |
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| 024 | |a 10.1590/0100-5405/179192 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 100 | 1 | |9 7504 |a Reis, Erlei Melo |u Universidad de Buenos Aires. Facultad de Agronomía. Buenos Aires, Argentina. | |
| 245 | 0 | 0 | |a Addition of mancozeb to the fungicide mixtures DMI + QoI and SDHI + QoI on the control of wheat leaf blights |
| 246 | 0 | 0 | |a Adição de mancozebe às misturas de fungicidas IDMs + IQes e IQes + ISDHs no controle das manchas foliares do trigo |
| 520 | |a Wheat leaf blights caused by Drechslera siccans, D. tritici-repentis, especially D. tritici-repentis, are difficult to be controlled by site-specific fungicide mixtures. Due to development of resistance, the use of double site-specific mixtures has shown control inferior to 50%. In an experiment conducted in the field with the wheat cultivar Jadeite 11, in 3 x 6 m plots and four replicates, the effect of a muli-site fungicide added to fungicide mixtures on the control of leaf blights was evaluated. The effect of the following mixtures was evaluated: picoxystrobin + cyproconazole, kresoxim-methyl + epoxiconazole, azoxystrobin + cyproconazole, pyraclostrobin + epoxiconazole, pyraclostrobin + fluxapyroxad, trifloxystrobin + prothioconazole and zoxystrobin + propiconazole, added of five mancozeb levels, 0; 1.5; 2.0; 2.5 and 3.0 kg/ha. The first application occurred after 30% Reis, E. M.; Zanatta, M.; Forcelini, C.A. Addition of mancozeb to the fungicide mixtures DMI + QoI and SDHI + QoI on the control of wheat leaf blights. Summa Phytopathologica, v.45, n.1, p.23-27, 2019. leaf incidence, and the remaining two occurred at 15 and 18-day intervals. The fungicides were applied with a backpack sprayer pressurized by CO2, delivering 180 L/ha. Leaf blights severity was quantified, control was calculated, the percentage of chlorophyll in flag leaves was determined, and grain yield was assessed. The mean control of leaf blights by the mixtures without addition of the multi-site fungicide was 44%. The disease severity reduced as a function of the addition of mancozeb levels for all treatments. Control superior to 80% was obtained with the mixtures resoxim methyl + epoxiconazole and pyraclostrobin + epoxiconazole, both added at least 2.0 kg/ha mancozeb. There was a positive reflex on the increase in wheat grain yield as a function of control, varying from 3005 kg/ha for the best treatment to 2026 kg/ha for control. | ||
| 653 | |a DRECHSLERA SICCANS | ||
| 653 | |a D. TRITICI-REPENTIS | ||
| 653 | |a MANGANESE ETHYLENE–BIS-DITHIOCARBAMATE | ||
| 653 | |a TRIAZOLES | ||
| 653 | |a STROBILURINS | ||
| 653 | |a CARBOXAMIDES | ||
| 653 | |a ETILENOBISDITIOCARBAMATO DE MANGANÊS | ||
| 653 | |a FALHA DE CONTROLE | ||
| 653 | |a TRIAZÓIS | ||
| 653 | |a ESTROBILURINAS | ||
| 653 | |a CARBOXAMIDAS | ||
| 700 | 1 | |a Zanatta, Mateus |u Agroservice - Pesquisa e consultoria agrícola. Passo Fundo - RS, Brasil. |9 69724 | |
| 700 | 1 | |a Forcelini, Carlos Alberto |u Universidade de Passo Fundo. Faculdade de Agronomia. Passo Fundo - RS, Brasil. |9 69725 | |
| 773 | |t Summa phytopathologica |g vol.45, n.1 (2019), p.23-27, tbls., grafs. | ||
| 856 | |f 2019reis |i En Internet: |q application/pdf |u http://ri.agro.uba.ar/files/download/articulo/2019reis.pdf |x ARTI201911 | ||
| 856 | |u http://www.summanet.com.br/ |z LINK AL EDITOR | ||
| 942 | |c ARTICULO | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||