Use of azoxystrobin and triazoles mixtures to control late season diseases in soybean crop
Widely spread in Argentina, late season diseases [LSD], cause yield losses and seed quality changes. Leaf application of fungicides is an effective procedure to manage LSD under the current cropping conditions [monocrop and no-till system]. The aims of the present study were 1] to determine causal agents of LSD, 2] to evaluate yield reduction caused by LSD and 3] to evaluate the efficiency of mixtures containing triazoles and strobirulins, sprayed during R3 or R5 reproductive stages to control LSD. Four experiments were carried out in a randomized complete block design, with four replicates in Armstrong, Santa Fe, Argentina, in a soybean cultivation area in the Pampeana Region. Two assays were performed in 2004/2005, and the remaining ones in 2005/2006 growing seasons. Two azoxystrobin mixtures, one with cyproconazole and the other with difenoconazole, and a mixture of the latter two were tested. The following pathogens were detected: Cercospora kikuchii, Colletotrichum truncatum, Septoria glycines, Glomerella glycines y Phomopsis sojae. All treatments presented higher yield than control, with 5 percent of statistic significance. It can be concluded that, under the present experimental conditions, characterized by frequent rains between R1 and R5.5, the tested mixtures efficiently controlled LSD.
| Main Authors: | , , , , |
|---|---|
| Format: | Texto biblioteca |
| Language: | spa |
| Subjects: | FUNGICIDES, SOYBEAN DISEASES, STROBILURINS, TRIAZOLES, CERCOSPORA KIKUCHII, COLLETOTRICHUM, COLLETOTRICHUM TRUNCATUM, DIAPORTHE PHASEOLORUM VAR. SOJAE, GLOMERELLA GLYCINES, GLYCINE MAX, SEPTORIA GLYCINES, |
| Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46646 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Widely spread in Argentina, late season diseases [LSD], cause yield losses and seed quality changes. Leaf application of fungicides is an effective procedure to manage LSD under the current cropping conditions [monocrop and no-till system]. The aims of the present study were 1] to determine causal agents of LSD, 2] to evaluate yield reduction caused by LSD and 3] to evaluate the efficiency of mixtures containing triazoles and strobirulins, sprayed during R3 or R5 reproductive stages to control LSD. Four experiments were carried out in a randomized complete block design, with four replicates in Armstrong, Santa Fe, Argentina, in a soybean cultivation area in the Pampeana Region. Two assays were performed in 2004/2005, and the remaining ones in 2005/2006 growing seasons. Two azoxystrobin mixtures, one with cyproconazole and the other with difenoconazole, and a mixture of the latter two were tested. The following pathogens were detected: Cercospora kikuchii, Colletotrichum truncatum, Septoria glycines, Glomerella glycines y Phomopsis sojae. All treatments presented higher yield than control, with 5 percent of statistic significance. It can be concluded that, under the present experimental conditions, characterized by frequent rains between R1 and R5.5, the tested mixtures efficiently controlled LSD. |
|---|