Growth Regulator Effects on the Market Quality of Five Virginia-Type Peanut Cultivars1

Abstract The growth regulator succinic acid 2, 2-dimethylhydrazide (SADH) was applied to the foliage of five virginia-type peanut (Arachis hypogaea L.) cultivars in 1980, 1981, and 1982 in Martin County, North Carolina, and Suffolk, Virginia. Treated and untreated peanuts at each location were harvested on two dates each year. Market grade, yield, and value/ha evaluations were made on the cultivars Florigiant, NC 6, NC 7, VA 81B, and NC 8C. Yield and value/ha within each cultivar were statistically different across years and locations. The growth regulator significantly reduced the percentage of fancy pods for all cultivars except VA 81B while significantly increasing the percentage of extra large kernels for all cultivars except NC 8C. The percentage of total kernels was not affected with Florigiant or NC 7, but significant reductions were observed with growth regulator application to NC 6, VA 81B, and NC 8C. The yield and value/ha of Florigiant and NC 6 increased significantly with growth regulator applications. Yield/ha of NC 7 increased with growth regulator application but was not statistically different; however, the NC 7 value/ha increased significantly. Growth regulator applications on NC 8C and VA 81B affected neither yield nor value/ha. Thus, applications of the growth regulator SADH can be a beneficial peanut production practice for some cultivars; however, the response within cultivars was inconsistent across years and locations.

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Effects of Intrarow Spacing on Yield and Market Quality of Peanut (Arachis hypogaea L.) Genotypes1

Peanut Science ◽

10.3146/i0095-3679-8-2-8 ◽

1981 ◽

Vol 8 (2) ◽

pp. 110-112 ◽

Cited By ~ 4

Author(s):

D. A. Knauft ◽

A. J. Norden ◽

N. F. Beninati

Keyword(s):

Arachis Hypogaea ◽

Yield Reduction ◽

Market Quality ◽

Good Production ◽

Arachis Hypogaea L ◽

Significant Yield ◽

Production Practices

Abstract Pod yields and grading data were analyzed for six peanut (Arachis hypogaea L.) genotypes grown in 91 cm rows while using three intrarow distances; 10.2 cm, 15.2 cm and 30.5 cm. Yields were analyzed for a 6-year period from 1975 to 1980 and grading data were analyzed for a 7-year period from 1974 to 1980. Three genotypes (Dixie Runner, UF714021 and UF439-16-6-3) showed no significant yield differences (all differences reported at the 5% level) among spacings. Florunner and Florigiant produced the same yields at 10.2 cm spacings as they did at 15.2 cm. Both cultivars showed a significant yield reduction at the 30.5 cm spacing. Early Bunch yields were significantly higher at 15.2 cm than at 30.5 cm, while the yield at 10.2 cm was intermediate, but was not significantly different from either 15.2 or 30.5 cm. Grading data included percentages of extra large kernels (ELK), total sound mature kernels, and Virginia pods. The percentage of ELK for Florigiant at 15.2 cm was significantly greater than the 30.5 cm spacing. Changes in intrarow spacings of the six gentoypes in this study produced no significant differences in any grading data with that exception. All the currently grown cultivars in these tests had yields with plant spacings at 15.2 cm that were not significantly different from yields at 10.2 cm. With good quality seeds and good production practices a considerable savings could be made with little or no yield reduction by planting at spacings near 15 cm.

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Potential for Improved Control of Southern Stem Rot of Peanut with Resistance and Fungicides1

Peanut Science ◽

10.3146/pnut.12.1.0002 ◽

1985 ◽

Vol 12 (1) ◽

pp. 4-7 ◽

Cited By ~ 1

Author(s):

B. B. Shew ◽

M. K. Beute ◽

J. E. Bailey

Keyword(s):

North Carolina ◽

Disease Resistance ◽

Arachis Hypogaea ◽

Sclerotium Rolfsii ◽

Stem Rot ◽

Arachis Hypogaea L ◽

Disease Loci ◽

Moderate Resistance

Abstract Potential for improved control of southern stem rot caused by Sclerotium rolfsii Sacc.on peanut (Arachis hypogaea L.) was evaluated by combining moderate resistance with fungicide use. Various fungicides including carboxin, oxycarboxin, propiconazol, OAC 3890, and PCNB were applied to peanut lines NC 8C, NC Ac 18016, and Florigiant in North Carolina during 1980, 1981, and 1982. Consistently fewer disease loci occurred on NC Ac 18016 than on NC 8C or Florigiant. At least one fungicide reduced stem rot incidence in two of three years tested, but fungicide use did not result in greater yields. Effects of disease resistance and fungicides on suppression of stem rot development were additive.

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