Meta‐analysis of fungicide efficacy on soybean target spot and cost–benefit assessment

Target spot of soybean has spread in Brazil, the southeastern United States and Argentina in the last decade. A collaborative network of field Uniform Fungicide Trials (UFT) in Brazil was created in 2011 to study the target spot control efficacy of fungicides, including azoxystrobin + benzovindiflupyr (AZ_BF), carbendazim (CZM), fluxapyroxad + pyraclostrobin (FLUX_PYRA), epoxiconazole + FLUX_PYRA (EPO_FLUX_PYRA), mancozeb (MZB) and prothioconazole + trifloxystrobin (PROT_TRIF). Network meta‐analysis was used to conduct a quantitative synthesis of UFT data collected from 2012 to 2016 and to evaluate the effects of disease pressure (DP, low ≤ 35% target spot severity in the nontreated control < high) and year of experiment on the overall mean efficacy and yield response to each of the tested fungicides. Based on mean percentage control of target spot severity, the tested fungicides fall into three efficacy groups (EG): high EG, FLUX_PYRA (76.2% control relative to the nontreated control) and EPO_FLUX_PYRA (75.7% control); intermediate EG, PROT_TRIF (66.5% control) and low EG, MZB (49.6% control), AZ_BF (46.7% control) and CZM (32.4% control). DP had a significant effect on yield response. At DPLow, the highest response was due to PROT_TRIF (+342 kg ha−1, +12.8%) and EPO_FLUX_PYRA (+295.5 kg ha−1, +11.2%), whereas at DPHigh, EPO_FLUX_PYRA and FLUX_PYRA outperformed the other treatments, with yield responses of 503 kg ha−1 (+20.2%) and 469 kg ha−1 (+19.1%), respectively. The probability of a positive return on fungicide investment ranged from 0.26 to 0.56 at DPLow and from 0.34 to 0.66 at DPHigh.

Bibliographic Details

Main Authors:	Edwards Molina, Juan Pablo, Paul, Pierce A., Amorim, Lilian, da Silva, Luis Henrique Carregal Pereira, Siqueri, Fabiano Victor, Borges, Edson Pereira, Campos, H.D., Nunes Júnior, José, Meyer, Maurício Conrado, Martins, Mônica Cagnin, Balardin, Ricardo Silveiro, Carlin, Valtemir José, Grigolli, José Fernando, Belufi, Luana Maria de Rossi, Godoy, Claudia Vieira
Format:	info:ar-repo/semantics/artículo biblioteca
Language:	eng
Published:	Wiley 2018-10-19T12:42:16Z
Subjects:	Soja, Glycine Max, Rendimiento, Corynespora Cassiicola, Rentabilidad, Fungicidas, Soybeans, Yields, Profitability, Fungicides, Network Meta-analysis,
Online Access:	http://hdl.handle.net/20.500.12123/3642 https://onlinelibrary.wiley.com/doi/abs/10.1111/ppa.12925 https://doi.org/10.1111/ppa.12925
Tags:	Add Tag No Tags, Be the first to tag this record!