Effects of Reduced Tillage, Resistant Cultivars, and Reduced Fungicide Inputs on Progress of Early Leaf Spot of Peanut (Arachis hypogaea)

Field experiments were conducted in 2000 and 2001 on Georgia Green, Florida MDR-98, and C-99R peanut (Arachis hypogaea) cultivars in Tifton, GA, to determine the effects of tillage practices on early leaf spot (Cercospora arachidicola) epidemics under standard fungicide regimes and fungicide regimes...

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Veröffentlicht in:Plant disease. - 1997. - 88(2004), 8 vom: 20. Aug., Seite 858-864
1. Verfasser: Monfort, W S (VerfasserIn)
Weitere Verfasser: Culbreath, A K, Stevenson, K L, Brenneman, T B, Gorbet, D W, Phatak, S C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Plant disease
Schlagworte:Journal Article conservation tillage deep turning integrated disease management partial resistance
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520 |a Field experiments were conducted in 2000 and 2001 on Georgia Green, Florida MDR-98, and C-99R peanut (Arachis hypogaea) cultivars in Tifton, GA, to determine the effects of tillage practices on early leaf spot (Cercospora arachidicola) epidemics under standard fungicide regimes and fungicide regimes with fewer applications. Leaf spot epidemics were suppressed in reduced tillage (strip-till) plots compared with conventional tillage plots and were suppressed in MDR-98 and C-99R cultivars compared with the standard runner-type cultivar, Georgia Green. Within tillage and cultivar combinations, leaf spot intensity typically was lower in plots treated with fungicides at standard intervals (seven total applications) than in those treated at extended intervals (four total applications). However, in most cases, leaf spot control in extended interval treatments in the strip-till system was comparable to that in the standard interval treatments in conventional tillage. Based on these results, the number of fungicide applications could be reduced without compromising control of leaf spot when reduced tillage is used, especially if combined with moderately resistant cultivars. Suppression of leaf spot epidemics in the strip-till plots did not coincide with higher yields in either year. In 2001, yields were lower in strip-till plots than in conventional tillage plots. Yields were typically higher in the cultivar C-99R than in Georgia Green, regardless of the tillage treatment 
650 4 |a Journal Article 
650 4 |a conservation tillage 
650 4 |a deep turning 
650 4 |a integrated disease management 
650 4 |a partial resistance 
700 1 |a Culbreath, A K  |e verfasserin  |4 aut 
700 1 |a Stevenson, K L  |e verfasserin  |4 aut 
700 1 |a Brenneman, T B  |e verfasserin  |4 aut 
700 1 |a Gorbet, D W  |e verfasserin  |4 aut 
700 1 |a Phatak, S C  |e verfasserin  |4 aut 
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