The effect of applications of manganese sulphate to a neutral soil upon the yield of tubers and the incidence of common scab in potatoes

McGregor, A. J.; Wilson, G.C.S.

doi:10.1007/bf01378098

Cited by 19 publications

(4 citation statements)

References 3 publications

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“…All of these practices increase the solubility of Mn, and situations where scab is severe with these practices appear to reflect the presence of too little readily reducible Mn for standard practices to have any effect (58,108). The low incidence of scab on acid soils is at least partially attributed to the concentration of soluble Mn released, and the occurrence of scab on acid soils is limited to soils with a low Mn content (100,101).…”

Section: Correlation Oj Disease With Environmentaljactors Which Also mentioning

confidence: 99%

The Role of Manganese in Resistance to Plant Diseases

Huber¹,

Wilhelm²

1988

Manganese in Soils and Plants

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Section: Correlation Oj Disease With Environmentaljactors Which Also mentioning

confidence: 99%

The Role of Manganese in Resistance to Plant Diseases

Huber¹,

Wilhelm²

1988

Manganese in Soils and Plants

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“…Addition of ALS to site W increased the concentration of manganese in both leaf tissue and tubers in the year of application. Increased levels of exchangeable manganese may be directly toxic to pathogens or may increase the resistance of plants to pathogen attack by improving metabolism (21)(22)(23)(24). If manganese was a factor involved in scab reduction at site W, it appeared not to be a factor at site V, however, where no elevated manganese levels in leaf tissue were found.…”

Section: Locationmentioning

confidence: 99%

Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment in four Ontario potato fields

Soltani

Conn

Abbasi

et al. 2002

Canadian Journal of Plant Pathology

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Single applications of ammonium lignosulfonate (ALS, ca. 6 t solids/ha) were made at four commercial potato fields in Ontario (sites K, V, W, and G in 1998, 1999, 2000, and 2000, respectively). Potato tubers were planted 2-4 weeks after ALS incorporation. The effects on potato scab, verticillium wilt, tuber yield, soil chemistry, and soil microbiology were determined in the year of application, and for a second crop at sites K (1999), V (2000), and G (2001). Potato scab severity was significantly reduced (50-80%) by ALS treatment in the year of application at all sites. Significantly less scab was present for the second crop at sites K and G. The incidence of Verticillium dahliae infected plants was also significantly decreased (40-50%) by ALS treatment at all sites in the year of application and for the second crop at site K. Ammonium lignosulfonate significantly increased total tuber yield by 2.5 times at site G in 2000. There was no effect on tuber yield at the other sites. However, marketable yield (tubers with <5% surface scab) was significantly increased three-to seven-fold over the control plots at all sites in the year of application. Although marketable yield was consistently higher in subsequent crops at all sites, it was only statistically significant at site G. Soil pH was immediately reduced following application of ALS by 0.4-0.6 units at all sites except site W, where it had no effect. Soil pH returned to control levels by the second season at all sites except site G, which remained one log unit lower than the control treatment. Numbers of soil microorganisms increased two-to eight-fold at all sites within weeks of ALS application. Fungal numbers increased the most and remained elevated for two seasons at site K compared with control plots. The results of this study clearly demonstrate that use of ALS as a soil amendment can significantly reduce the severity of potato scab and verticillium wilt in potato crops.

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“…A different explanation is that the important effect of organic amendment is to alter the availability of manganese in the soil, this in turn affecting growth of S. scabies. Spatz (1955), Guntz & Coppenet (1957), Mortvedt (1962), Mortvedt, Fleischfresser, Berger & Darling (1960, and McGregor & Wilson (1964) have shown that broadcast applications of manganese sulphate can control common scab, although other trials have given no control (R. D. Watson, 1967, personal communication). Mortvedt et al (1961) suggested that high concentrations of soluble manganese could explain why scab is normally less prevalent in acid soils.…”

Section: Introductionmentioning

confidence: 99%

Organic manuring for potato scab control and its relation to soil manganese

Rogers

1969

Annals of Applied Biology

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SUMMARY The suggestion that organic amendment of soil controls scab by reducing insoluble soil manganese to soluble forms toxic to Streptomyces scabies was investigated in pot and field experiments by assessing numbers of manganese‐reducing micro‐organisms in soil. Dried grass meal (2 tons/acre) gave significant control of scab but increases in soluble manganese were insufficient to account for this control. Populations of micro‐organisms in soil increased after adding grass meal but decreased again by the time tubers were initiated and scab infection began. The results suggest that manganese reduction could affect scab if soil contained easily reducible manganese, because dried grass meal increased the numbers of manganese‐reducing micro‐organisms.

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The effect of applications of manganese sulphate to a neutral soil upon the yield of tubers and the incidence of common scab in potatoes

Cited by 19 publications

References 3 publications

The Role of Manganese in Resistance to Plant Diseases

The Role of Manganese in Resistance to Plant Diseases

Reduction of potato scab and verticillium wilt with ammonium lignosulfonate soil amendment in four Ontario potato fields

Organic manuring for potato scab control and its relation to soil manganese

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