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| Format: | Artículo científico |
| Language: | en |
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Universidade Estadual de Maringá
2015
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| Online Access: | https://www.redalyc.org/articulo.oa?id=303042425004 |
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Table of Contents:
- The mixture volume sprayed by hydraulic and centrifugal energy nozzles for the control of Asian soybean rust Lilian Lúcia Costa Marcelo da Costa Ferreira Henrique Borges Neves Campos Giorge Gomes França de Carvalho José Calos Barbosa Agrociencias coverage deposition Glycine max Spray nozzle disease severity The objective of this work was to evaluate a means of controlling ASR ( Phakopsora pachyrhizi H. Sydow & P. Sydow ) by applying reduced fungicide volumes in association with spray nozzles using either hydraulic or centrifugal en ergy. Two experiments resulted from that objective: soybean plants ( Glycine max (L.) Merril) of the ‘BRS Valiosa RR’ cultivar were grown at the Experimental Farm of the University of São Paulo State (Unesp) in Jaboticabal, Brazil. The treatments were distributed in the field according to a randomized complete block design with four replications. The tr eatments consisted of the volumes of 50, 100, and 150 L ha -1 (droplets resulting from hydraulic energy) and 17, 35, and 50 L ha -1 (droplets resulting from ce ntrifugal energy). An additional treatment was applied without fungicide (i.e., baseline treatment). The volume of 150 L ha -1 with droplets formed by hydr aulic energy permitted the best pathogen control using the fungicide azoxystrobina and cyproconazole in comparison with the other treatments. The volume of 17 L ha -1 with the droplets formed by cent rifugal energy was the least efficient and resulted in the highest rust severity and the lowest grain yield. 2015 artículo científico 1679-9275 https://www.redalyc.org/articulo.oa?id=303042425004 en http://www.redalyc.org/revista.oa?id=3030 Acta Scientiarum. Agronomy application/pdf Universidade Estadual de Maringá Acta Scientiarum. Agronomy (Brasil) Num.4 Vol.37