Peanut Yield Loss in the Presence of Defoliation Caused by Late or Early Leaf Spot

Late and early leaf spot, respectively caused by Nothopassalora personata and Passalora arachidicola, are damaging diseases of peanut (Arachis hypogaea) capable of defoliating canopies and reducing yield. Although one of these diseases may be more predominant in a given area, both are important on a...

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Veröffentlicht in:Plant disease. - 1997. - 104(2020), 5 vom: 05. Mai, Seite 1390-1399
1. Verfasser: Anco, Daniel J (VerfasserIn)
Weitere Verfasser: Thomas, James S, Jordan, David L, Shew, Barbara B, Monfort, W Scott, Mehl, Hillary L, Small, Ian M, Wright, David L, Tillman, Barry L, Dufault, Nicholas S, Hagan, Austin K, Campbell, H Lee
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article Arachis hypogaea digging groundnut harvest inversion quantitative synthesis senescence
Beschreibung
Zusammenfassung:Late and early leaf spot, respectively caused by Nothopassalora personata and Passalora arachidicola, are damaging diseases of peanut (Arachis hypogaea) capable of defoliating canopies and reducing yield. Although one of these diseases may be more predominant in a given area, both are important on a global scale. To assist informed management decisions and quantify relationships between end-of-season defoliation and yield loss, meta-analyses were conducted over 140 datasets meeting established criteria. Slopes of proportion yield loss with increasing defoliation were estimated separately for Virginia and runner market type cultivars. Yield loss for Virginia types was described by an exponential function over the range of defoliation levels, with a loss increase of 1.2 to 2.2% relative to current loss levels per additional percent defoliation. Results for runner market type cultivars showed yield loss to linearly increase 2.2 to 2.8% per 10% increase in defoliation for levels up to approximately 95% defoliation, after which the rate of yield loss was exponential. Defoliation thresholds to prevent economic yield loss for Virginia and runner types were estimated at 40 and 50%, respectively. Although numerous factors remain important in mitigating overall yield losses, the integration of these findings should aid recommendations about digging under varying defoliation intensities and peanut maturities to assist in minimizing yield losses
Beschreibung:Date Completed 05.05.2020
Date Revised 05.05.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:0191-2917
DOI:10.1094/PDIS-11-19-2286-RE