The effect of time of planting on occurrence of internal brown spot in the potato variety Arran Banner in Lebanon

1960 ◽  
Vol 37 (1) ◽  
pp. 23-27 ◽  
Author(s):  
A. A. Ahmadi ◽  
H. Mobarak ◽  
John Osgusthorpe
Keyword(s):  
Potato Variety ◽  
Brown Spot ◽  
Internal Brown Spot

Factors influencing incidence of internal brown spot in Russet Burbank potatoes

1984 ◽  
Vol 61 (6) ◽  
pp. 335-343 ◽  
Author(s):  
W. M. Iritani ◽  
L. D. Weller ◽  
N. R. Knowles
Keyword(s):  
Russet Burbank ◽  
Brown Spot ◽  
Internal Brown Spot ◽  
Factors Influencing

The dependence of internal brown spot development upon calcium fertility in potato tubers

1996 ◽  
Vol 39 (1) ◽  
pp. 165-178 ◽  
Author(s):  
Nora L. Olsen ◽  
Larry K. Hiller ◽  
Loretta J. Mikitzel
Keyword(s):  
Brown Spot ◽  
Potato Tubers ◽  
Internal Brown Spot

scholarly journals Enhancing Potato Tuber Calcium Concentration Through Calcium Application May Reduce the Incidence of Internal Brown Spot and Hollow Heart

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 759A-759 ◽  
Author(s):  
Matthew D. Kleinhenz ◽  
Christopher C. Gunter ◽  
Jiwan P. Palta
Keyword(s):  
Calcium Concentration ◽  
Sandy Loam ◽  
Hollow Heart ◽  
Calcium Nitrate ◽  
Brown Spot ◽  
Internal Quality ◽  
Internal Defects ◽  
Internal Brown Spot ◽  
Liquid Calcium ◽  
Cultivar Atlantic

A direct comparison was made of several commercially available calcium sources applied on two different schedules for their effectiveness in increasing tuber medullary and periderm tissue calcium concentrations in 170–284-g tubers of the cultivar Atlantic grown on a Plainfield sandy loam. Plots (6 x 3 m) were arranged in a CR design in 1993 and a RCBD in 1994 (eight replications). Paired measurements of tuber Ca concentration and internal quality (±hollow heart, ±internal brown spot) were made on individual tubers produced in plots with no additional or additional Ca (168 kg Ca/ha) supplied from either gypsum, liquid calcium nitrate, or NHIB. Two Ca and N application schedules were compared: 1) application at emergence and hilling (non-split), 2) application at emergence, hilling, and 4 and 8 weeks after hilling (split). All plots received 224 kg H/ha balanced with ammonium nitrate. In general, tuber yield and grade were unaffected by treatments in 1993 and 1994, but overall percent A-grade was lowest and percent B-grade highest in 1993 compared with 1994 data. In 1993, all treatments receiving Ca had greater mean tuber medullary and periderm tissue Ca concentration values and a greater percentage of tubers with an elevated Ca concentration compared with non-Ca-supplemented controls. The overall incidence of tuber internal defects was 5% in 1993. All split schedule treatments receiving Ca showed 0% internal defects. In contrast, nearly 8% of the tubers from control plots showed some defect. The medullary tissue Ca concentration of 65% of the tubers having either defect was below the median value of Ca concentration for the entire experiment in 1993. Similar evaluations are underway for the 1994 crop. These data suggest that tuber calcium concentration may be related to the incidence of these internal defects.

Relationships Between Internal Brown Spot and Skin Roughness in Potato Tubers Under Field Conditions

2018 ◽  
Vol 61 (4) ◽  
pp. 327-339
Author(s):  
Francesco Raimo ◽  
Alfonso Pentangelo ◽  
Catello Pane ◽  
Bruno Parisi ◽  
Giuseppe Mandolino
Keyword(s):  
Field Conditions ◽  
Brown Spot ◽  
Potato Tubers ◽  
Internal Brown Spot

scholarly journals Enhancing Tuber Calcium Concentration May Reduce Incidence of Blackspot Bruise Injury in Potatoes

HortScience ◽  
2006 ◽  
Vol 41 (5) ◽  
pp. 1213-1221 ◽  
Author(s):  
Björn H. Karlsson ◽  
Jiwan P. Palta ◽  
Peter M. Crump
Keyword(s):  
Calcium Concentration ◽  
Water Soluble ◽  
Brown Spot ◽  
Wall Structure ◽  
Tuber Quality ◽  
Tuber Tissue ◽  
Internal Brown Spot ◽  
Pooled Data ◽  
Blackspot Bruise ◽  
Tissue Calcium

Our previous research has provided evidence that in-season calcium applications can increase tuber calcium and improve tuber quality with reduced internal defects. To determine if increasing the tuber calcium concentration also mitigates tuber bruise incidence, five commercially relevant potato (Solanum tuberosum L.) cultivars (`Russet Burbank', `Atlantic', `Snowden', `Superior', and `Dark Red Norland') were grown during three seasons, 1999–2001. Three split applications of a calcium/nitrogen water soluble blend totaling 168 kg·ha–1calcium were made starting at hilling. All plots, including controls, received an equal amount of total nitrogen in a season. Tubers were allowed to be bruised during normal machine harvest standard to commercial production in Wisconsin. Over 100 tubers from each replication (5–10 replications/treatment) were cut and examined for the incidences of bruise and internal brown spot. Paired samples of medullary tissue were taken for measuring calcium concentration. As expected, tuber tissue calcium concentration increased significantly, in all cultivars and in all years, with in-season calcium application. Bruise incidence varied among cultivars and seasons. Although tuber calcium concentration varied among seasons, `Atlantic' and 'Snowden' consistently had the lowest calcium concentration, whereas `Superior' and `Dark Red Norland' consistently had the highest calcium concentration. Meta-analysis of pooled data for three years showed that blackspot bruise incidence was significantly reduced with calcium application in `Atlantic', `Burbank', and `Snowden'. On the other hand, `Dark Red Norland' and `Superior' had low incidence of bruise and were unaffected by calcium applications. Regression analyses of pooled data from all cultivars for three years revealed a significant quadratic relationship between blackspot bruise and tuber tissue calcium as well as between blackspot bruise and internal brown spot. A linear to plateau plot of medullary calcium concentration versus blackspot bruise incidence revealed that bruise incidence is minimized between 200 and 250 μg/kg (dry wt)–1 tuber calcium concentration. To our knowledge, ours is the first study providing evidence for reducing bruise by improving tuber calcium. Variations in the bruise incidences among cultivars generally followed tuber calcium concentration suggesting a genetic control. Given the role of calcium in improved membrane health and enhanced wall structure, and as a modulator of physiological responses, it is not surprising that internal brown spot and bruise incidences are reduced by in-season application to calcium-deficient cultivars.

scholarly journals INTERNAL BROWNING IN `ATLANTIC' POTATO TUBERS AS AFFECTED BY CALCIUM, IRRIGATION, AND STRAW-MULCHING

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1093d-1093
Author(s):  
C.R Roberts ◽  
Dean E. Knavel ◽  
John Snyder ◽  
Terry Jones ◽  
Dave Spalding
Keyword(s):  
Brown Spot ◽  
Potato Tubers ◽  
Straw Mulching ◽  
Internal Brown Spot ◽  
Affected Tissue ◽  
Internal Browning

Internal brown spot (IBS) was found consistently in the `Atlantic' cultivar at Lexington in 1967, 1968 and 1989, and at Owensboro and Quicksand, KY in 1987, Treatments of foliar and soil applied CaSO4 in 1987, soil-applied CaSO4 in 1988, and straw mulching in 1989 did not reduce IBS. Irrigation increased IBS because of larger tubers and increased Ca content of plants as compared with non-irrigated plants. Tubers showing IBS had higher Ca content in affected tissue than in non-affected tissue. Both IBS and Ca content of leaves increased as the plants aged.

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